| A |
| Avro Transport Company | | | | | 1919 | 1920 | First regular airline in the UK |
| A2B Airways | | | | | 2005 | 2006 | Established as Flykeen Airways. Acquired by British NorthWest Airlines |
| AB Airlines | | 7L | AZX | AZTEC | 1993 | 1999 | Entered administration |
| AB Shannon | | | | | 1995 | 1996 | Established as Air Bristol in 1993. Operated BAC 1-11 |
| Aberdeen Airways (1934) | | | | | 1934 | 1937 | Became Allied Airways (Gandar Dower) |
| Aberdeen Airways (1989) | | SM | AAW | GRANITE | 1989 | 1992 | |
| Aberdeen London Express | | | | | 1994 | 1994 | Operated BAC 1-11 |
| ACE Freighters | | | | | 1964 | 1966 | |
| ACE Scotland | | | | | 1966 | 1966 | Subsidiary company of ACE Freighters |
| Aer Lingus UK | | EG | EUK | GREEN FLIGHT | 2021 | 2026 | The Northern Irish subsidiary of the Irish flag carrier, Aer Lingus, headquartered in Belfast. Manchester Airport base was closed resulting in cessation of operations |
| Aerofilms | | | | | 1919 | 1925 | Taken over by Hunting Aerosurveys |
| African Air Safaris | | | | | 1954 | 1959 | Established as Meredith Air Transport in 1952. Renamed Air Safaris. Operated Handley Page Hermes, Vickers VC.1 Viking |
| Air 2000 | | DP | AMM | JETSET | 1987 | 2003 | Renamed First Choice Airways |
| Air Alba | | | RLB | | 1991 | 1997 | Renamed Highland Airways |
| Air Anglia | | AQ | AQ | ANGLIAN | 1970 | 1980 | Merged with British Island Airways to form AirUK |
| Air Atlanta Europe | | 5A | EUK | SNOWBIRD | 2003 | 2006 | Merged into XL Airways UK |
| Air Atlantique | | | | | 1969 | 1990 | Established as General Aviation Services in 1969. Renamed Air Corbiere. Operated Douglas DC-3 |
| Air Belfast | | 7L | AZX | | 1995 | 1996 | Former Air Bristol, integrated into AB Airlines.[citation needed] |
| Air Bridge Carriers | | AB | | | 1972 | 1992 | Renamed Hunting Cargo Airlines. Operated AW.660 Argosy, Vickers Vanguard, L-188 Electra |
| Air Bristol | | 7L | AZX | | 1992 | 1997 | Formed by Brymon Airways's founder (Charles Stuart who died 1993), reorganized 1993 by British Aerospace. Doing business as AB Airlines from 1997. |
| Air Caledonian | | | CSF | | 2003 | 2005 | |
| Air Camelot | | | | | 1978 | 1986 | Operated Piper Apache |
| Air Cargo | | | | | 1991 | 1994 | Operated Douglas DC-8 |
| Air Cavrel | | | ACL | CAVREL | 1996 | 2002 | Operated Short 330[citation needed] |
| Air Charter Limited | | | | | 1947 | 1960 | To British United Airways |
| Air Commerce | | | | | 1938 | 1947 | To British European Airways |
| Air Commuter | | 3A | ACK | | 1982 | 1984 | Renamed Venture Airways. Operated BAe Jetstream, Cessna Citation I[citation needed] |
| Air Condor | | | | | 1960 | 1960 | Established as Shortcut Airlines. Operated Bristol Freighter, Douglas DC-4, Vickers VC.1 Viking |
| Air Contractors | | | | | 1946 | 1949 | Took part in the Berlin Airlift. Operated Douglas C-47A, Miles Aerovan |
| Air Cordial | | | | | 2000 | 2004 | Aircraft operated by Air Scandic |
| Air Couriers | | | | | 1938 | | |
| Air Dispatch | | | | | 1936 | 1940 | |
| Air Ecosse | | EC | ECS | AIR ECOSSE | 1977 | 1988 | Subsidiary of Fairflight Charters of Biggin Hill. |
| Air Enterprises | | | | | 1946 | 1955 | Operated de Havilland Dragon Rapide |
| Air Envoy | | | | | 1968 | 1971 | Renamed Central Air Services. Operated Douglas DC-3, Piper Aztec |
| Air Europe | | AE | AOE | AIR EUROPE | 1979 | 1991 | |
| Air Europe Express | | AX | AEE | | 1982 | 1991 | Established as Connectair in 1984 |
| Air Exel UK | | EXX | | | 1990 | 1992 | Operated Embraer Brasilia |
| Air Faisal | | | KV | | 1975 | 1978 | Operated Bristol Britannia |
| Air Ferry Limited | | | | | 1962 | 1968 | |
| Air Foyle HeavyLift | | GS | UPA | FOYLE | 1978 | 2006 | Formed as a joint venture between Air Foyle and HeavyLift Cargo Airlines. |
| Air Freight | | | | | 1967 | 1975 | Renamed Skyways Air Cargo |
| Air Freight Express | | 5Z | AFX | | 1999 | 2002 | Operated Boeing 747-200 |
| Air Gregory | | | | | 1963 | 1968 | Established as Gregory Air Taxis. Operated Cessna 172, Piper Aztec, Douglas C-47A, Piper Twin Comanche |
| Air Hanson | | | | | 1965 | 2000 | Operated BAC 1-11 |
| Air Hire | | | | | 1934 | 1935 | Established as Wrightson Air Hire in 1933. Operated de Havilland Leopard Moth |
| Air International | | AK | | | 1971 | 1973 | Operated Vickers Viscount |
| Air Kent | | | | | 1979 | 1979 | Operated Piper Navajo Chieftain |
| Air Kilroe | | 9R | AKL | KILROE | 1978 | 1992 | Merged into Eastern Airways. Operated BAe Jetstream |
| Air Kruise | | | | | 1946 | 1958 | |
| Air Links | | | | | 1958 | 1966 | Renamed Transglobe Airways. Operated Bristol Britannia, Handley Page Hermes |
| Air Luton | | | | | 1983 | 1986 | Operated Douglas C-47A, Piper Navajo |
| Air Manchester | | | | SUREWAY | 1982 | 1982 | |
| Air Medical | | | MCD | AIR MED | 1985 | 2016 | Operated Learjet 35, Piper Cheyenne, Piper PA-31T Cheyenne |
| Air Metro | | | | | 1988 | 1989 | Operated Swearingen Metro |
| Air Oxford | | | | | 1979 | 1982 | Operated Piper Chieftain, Piper Navajo |
| Air Safaris | | | | | 1960 | 1962 | |
| Air Sarnia | | SG | ASS | | 1985 | 1990 | Acquired EVA (Ellan-Vannin Airlines). Operated Britten-Norman Trislander |
| Air Scandic | | | SCY | AIRSCAN | 2003 | 2005 | |
| Air Scandic International Aviation | | | SCY | AIRSCAN | 1997 | 2003 | Merged into Air Scandic |
| Air Scotland | | | SCO | | 2003 | 2005 | |
| Air Shetland | | | | | 1978 | 1980 | Operated Embraer Bandeirante |
| Air Southwest | | SZ | WOW | SWALLOW | 2003 | 2011 | |
| Air Sylhet | | SL | SHR | SYLHET | 2007 | 2009 | |
| Air Swansea | | | | | 1980s | 1980s | Operated Piper Navajo |
| Air Swift Ltd | | | SWF | | 1986 | 1996 | Operated BAe Jetstream 31, Beech King Air |
| Air Tabernacle | | | | | 1996 | 1998 | Formed by a merger between Willow Air and Streamline Aviation. Operated Embraer Bandeirante |
| Air Taxi (Cumberland) | | | | | 1954 | 1961 | Operated de Havilland Dragon Rapide |
| Air Transport Charter | | | | | 1947 | 1950 | |
| Air UK Commuter | | | | | 1984 | 1992 | Operated Short 330 |
| Air UK Leisure | | MV | UKL | LEISURE | 1988 | 1993 | Renamed Leisure International Airways |
| Air Ulster | | | | | 1967 | 1970 | Operated Douglas C-47A, Vickers Viscount |
| Air Wales (1977) | | | | | 1977 | 1979 | |
| Air Wales | | 6G | AWW | RED DRAGON | 2000 | 2006 | |
| Aircraft Operating Company | | | | | 1924 | 1944 | Acquired by Hunting Aerosurveys |
| Aircraft Transport and Travel | | | | | 1916 | 1921 | A subsidiary of Airco, its assets were used to create Daimler Airway. Through numerous takeovers and mergers, it became a part of British Airways. |
| Airflight | | | | | 1948 | 1950 | |
| Airfreight Express | | 5Z | AFX | | 1999 | 2003 | Operated Boeing 747-200 |
| Airspan Travel | | | | | 1948 | 1952 | Operated Airspeed Consul |
| Airtours | | VZ | AIH | TOURJET then KESTREL from 1997 | 1991 | 2002 | Renamed MyTravel Airways |
| AirUK | | UK | UKA | UKAY | 1980 | 1998 | Renamed KLM uk |
| Airviews | | | | | 1953 | 1957 | Operated de Havilland Dragon Rapide, de Havilland Dove |
| Airways International Cymru | | AK | CYM | WELSHAIR | 1984 | 1988 | |
| Airwork Limited | | AW | | | 1928 | 1960 | Merged with Hunting-Clan Air Transport to form British United Airways |
| Airworld | | RL | AWD | ENVOY | 1994 | 1998 | Merged into Flying Colours Airlines then JMC Air |
| Alan Cobham Aviation | | | | | 1927 | 1928 | Founded by Alan Cobham |
| Alderney Air Charter | | | | | 1964 | 1975 | Founded by Peter Moss. Renamed Mossair. Operated Cessna Skymaster |
| Alderney Air Ferries | | | | | 1979 | 1982 | Renamed Metropolitan Airways. Operated BN-2 Islander |
| Alidair | | QA | | | 1972 | 1981 | Renamed Inter City Airlines. Operated Vickers Viscount |
| All Cargo Airlines | | UF | | | 1978 | 1979 | Operated Bristol Britannia |
| All Leisure Airways | | | ALT | JETWING | 1994 | 1997 | Acquired by TransAer International Airlines |
| Allied Airways (Gandar Dower) | | | | | 1937 | 1947 | Former Aberdeen Airways (1934). Merged to British European Airways |
| Allied British Airways | | | | | 1935 | 1935 | Formed by merger of Spartan Air Lines, United Airways Ltd, Hillman Airways |
| Alpha One Airways | | | | | 2005 | 2006 | Small regional airlines |
| Altavia Jet Services | | | | | 2009 | 2010 | Renamed Cello Aviation |
| Ambassador Airways | | B3 | AMY | AMBASSADOR | 1992 | 1994 | |
| Amberair (Amber Airways) | | DD | ABM | DIAMOND | 1988 | 1989 | Operated Boeing 737-200 |
| Anglian Air Charter | | | | | 1950 | 1970 | Merged with Norfolk Airways and Rig Air to form Air Anglia |
| Anglo Cargo | | ML | ANC | ANGLO | 1983 | 1992 | Operated Boeing 707-320, Boeing 757, BAC 1-11 |
| Anglo European Airways | | | | | 1940 | 1940 | Operated DH.90 Dragonfly originally G-AEDK of Anglo European Airways |
| Anglo Normandy Aviation | | | | | 1975 | 1979 | Acquired by Aurigny Air Services. Operated Piper Aztec |
| Aquila Airways | | | | | 1948 | 1958 | |
| Argus Air Transport | | | | | 1957 | 1960 | Renamed Autair |
| Astraeus Airlines | | 5W | AEU | FLYSTAR | 2002 | 2011 | |
| Atlanta Airways (UK) | | KG | | | 1996 | 1996 | Low cost subsidiary of Caledonian Airways. Operated Lockheed Tristar |
| Atlantic Air Transport | | | | | 1985 | 2007 | Renamed RVL Aviation. Operated Bristol Freighter |
| Atlantic Airlines | | | NPT | NEPTUNE | 1994 | 2013 | Renamed West Atlantic UK |
| Atlantic Airways (UK) | | | ALH | | 1993 | 1998 | Operated Fairchild Metroliner |
| Atlantic Bridge Aviation | | | | | 1990s | 1990s | Operated BN-2 Islander |
| Atlantic Cargo | | | | | 1993 | 1998 | Operated Lockheed L-188 Electra |
| Atlantic Express | | | SBV | RIPPLE | 1985 | 2007 | |
| Autair | | | OU | | 1953 | 1969 | Renamed Court Line Aviation |
| AV8 Air | | | MNF | RINGWAY | 2003 | 2004 | |
| B |
| BA CitiExpress | | TH | BRT | BRITISH | 2002 | 2006 | Renamed BA Connect |
| BA Connect | | TH | BRT | BRITISH | 2006 | 2007 | Merged into Flybe. |
| BAC Aircraft | | | ABR | | 1992 | 1995 | Renamed BAC Express Airlines |
| BAC Express Airlines | | | RPX | | 1995 | 2007 | Renamed HD Air Ltd |
| Baltic Airlines | | | | | 1986 | 1989 | Merged into British Air Ferries. Operated Vickers Viscount[citation needed] |
| Baylee Air Charter | | BC | | | 1971 | 1978 | Operated Piper Aztec |
| BBC Air | | | | | 1996 | 2009 | Operated de Havilland Dove |
| BEA Airtours | | KT | | | 1969 | 1974 | |
| BEA Helicopters | | | | | 1964 | 1974 | Operated Agusta-Bell 206, Sikorsky S-58T, Sikorsky S-61 |
| Benair | | | | | 1999 | 1999 | Established as Martini Airfreight Services in 1996. Operated Cessna 208B |
| Berkshire Aviation Company | | | | | 1919 | 1922 | Founded by East Hanney, John and Fred Holmes. Operated Avro 504 |
| Berkshire Aviation Tours | | | | | 1924 | 1929 | Amalgamated with Northern Air Transport. Operated Avro 504 |
| Berlin European UK | | WZ | RGN | | 1987 | 1991 | Acquired by Germania |
| Berlin Regional UK | | WZ | | | 1985 | 1990 | Operated Jetstream 31 |
| Birkett Air Services | | | | | 1933 | 1948 | Operated de Havilland Dragon Rapide |
| Birmingham European Airways | | VB | BEA | BIRMEX | 1989 | 1992 | Merged into Brymon Airways |
| Birmingham Executive Airways | | EB | BEX | | 1983 | 1989 | Renamed/merged to Birmingham European Airways |
| BKS Aero Charter | | | | | 1952 | 1953 | Renamed BKS Air Transport. Operated Douglas DC-3 |
| BKS Air Transport | | | | | 1952 | 1970 | Acquired by British European Airways and renamed Northeast Airlines |
| Blackpool and West Coast Air Services | | | | | 1933 | 1937 | Renamed West Coast Air Services |
| Blue-Air | | | | | 1958 | 1959 | Established as Independent Air Transport in 1954. Operated Beech 18, Douglas C-54B, Vickers VC.1 Viking |
| Blue Islands | | SI | BCI | BLUE ISLAND | 2006 | 2025 | Ceased trading |
| Blue-Line Airways | | | | | 1946 | 1949 | Operated Douglas C-47B, Avro Anson |
| bmi British Midland | | BD | BMA | | 2001 | 2012 | Merged into British Airways |
| bmi Regional | | WW / BM | GNT / BMR | | 2001 | 2015 | Renamed Flybmi |
| bmibaby | | WW | BMI | BABY | 2002 | 2012 | Acquired by British Airways and subsequently closed |
| BOAC Cargo Service | | | | | 1960 | 1960 | Operated Douglas DC-7 |
| BOAC-Cunard | | | | | 1962 | 1966 | |
| BOBWOOD | | | | | 1968 | 1969 | Renamed Tradewinds Airways. Operated Canadair CL-44 |
| Bon Accord Airways | | | BON | | 1992 | 1997 | Founded by John Begg. Operated Short 330-200, Short 360-100 |
| Bond Air Services | | | | | 1948 | 1949 | Operated de Havilland Express |
| Bostonair | | | | | 1982 | 1998 | Operated Cessna 310 |
| Bristol Air Taxis | | | | | 1968 | 1979 | Operated Piper Navajo |
| Britannia Airways | | BY | BAL | BRITANNIA | 1964 | 2005 | Renamed Thomsonfly |
| Britavia | | | | | 1948 | 1961 | |
| British Air Ferries (BAF) | | VF | BAF | AIR FERRY | 1967 | 1993 | Renamed/merged to British World Airlines |
| British Air Services | | | | | 1969 | 1979 | Operated Vickers Viscount, Hawker Siddeley Trident, Skyvan |
| British Air Transport (BAT) | | | | | 1932 | 1951 | |
| British Airtours | | KT | BKT | BEATOURS | 1974 | 1988 | Founded as BEA Airtours, to Caledonian Airways |
| British Airways Ltd | | | | | 1935 | 1940 | Merged with Imperial Airways to form British Overseas Airways Corporation (BOAC) |
| British Airways Ltd (2012–2015) | | BA | BAT | GHERKIN | 2012 | 2015 | |
| British Airways CitiExpress | | TH | BRT | | 2002 | 2006 | Renamed/merged to BA Connect |
| British Airways Express | | TH | MXE | | 1996 | 2002 | Renamed/merged to British Airways Citiexpress Isle of Man |
| British Airways Helicopters | | | | | 1964 | 1986 | Sold to Maxwell Aviation and renamed British International Helicopters |
| British Airways World Cargo | | | | | 2001 | 2014 | Merged with Iberia Cargo to form IAG Cargo |
| British American Air Services | | | | | 1938 | 1949 | Operated Fokker F.XXII, Handley Page Halifax, de Havilland Express |
| British Amphibious Airlines | | | | | 1932 | 1933 | |
| British Asia Airways | | BR | BAW | SPEEDBIRD | 1995 | 2001 | Part of British Airways |
| British Aviation Services | | | | | 1946 | 1962 | |
| British Caledonian | | BR | BCA | CALEDONIAN | 1971 | 1988 | Merged into British Airways |
| British Caledonian Charter | | JB | | | 1982 | 1985 | Merged into Cal Air International |
| British Cargo Airlines | | FF | | | 1979 | 1980 | Formed by merger of Transmeridian Air Cargo and IAS Cargo Airlines. Operated Canadair CL-44, DC-8-40 |
| British Caribbean Airways | | EO | | | 1986 | | |
| British Continental Airways | | | | | 1935 | 1936 | Merged into British Airways in 1936. |
| British Eagle International Airlines | | EG | EGT | | 1963 | 1968 | |
| British European | | JY | JEA | JERSEY | 2000 | 2002 | Renamed Flybe |
| British European Airways (BEA) | | BE | BEE | BEALINE | 1946 | 1974 | Merged with British Overseas Airways Corporation to form British Airways |
| British Flying & Motor Services | | | | | 1927 | 1927 | Operated Airco DH.6 |
| British Global | | 7G | MKA | | 2008 | 2010 | Operated Boeing 747-200 |
| British Independent Airways | | | | | 1989 | 1991 | Operated HS 748 |
| British International Helicopters | | BS | BIH | BRINTEL | 2000 | 2012 | |
| British Island Airways (BIA) | | UK | BIA | BRITISLAND | 1970 | 1980 | Original BIA merged with Air Anglia, Air Wales and Air Westland to form AirUK |
| British Island Airways | | KD | BIA | BRITISLAND | 1982 | 1990 | Second BIA formed in 1982 from AirUK's charter operations |
| British Latin American Air Lines | | | | | 1944 | 1946 | Renamed British South American Airways |
| British Marine Air Navigation Co Ltd | | | | | 1923 | 1924 | Merged with Handley Page Transport, Instone Air Line and Daimler Airway to form Imperial Airways |
| British Mediterranean Airways | | KJ | LAJ | BEE MED | 1994 | 2004 | Renamed BMED[citation needed] |
| British Mediterranean Airways (B|MED) | | KJ | LAJ | | 2004 | 2007 | |
| British Midland Airways (BMA) | | BD | BMA | BEE MED | 1964 | 2001 | Renamed Bmi British Midland |
| British Midland Commuter | | BD | GNT | GRANITE | 1998 | 2001 | Renamed bmi Regional |
| British Midland International (bmi) | | BD | BMA | MIDLAND | 1938 | 2012 | Established as Air Schools, renamed British Midland Airways in 1964, renamed British Midland International in 2001. Integrated into British Airways |
| British Nederland Air Services | | | | | 1946 | 1951 | Operated Douglas C-47A |
| British NorthWest Airlines | | W9 | BNW | BRITISH NORTH | 2001 | 2006 | |
| British Oriental Air Charter | | | | | 1985 | 1986 | |
| British Overseas Air Charter | | | | | 1970 | 1974 | BOAC's charter service |
| British Overseas Airways Corporation (BOAC) | | BA | | SPEEDBIRD | 1939 | 1974 | Merged to form British Airways |
| British Regional Airlines | | | | | 1996 | 2002 | |
| British South American Airways | | | | | 1946 | 1949 | Renamed British Overseas Airways Corporation |
| British United (C.I.) Airways | | | | | 1963 | 1963 | Operated Handley Page Dart Herald |
| British United Air Ferries | | | | BUAF | 1963 | 1967 | Renamed British Air Ferries |
| British United Airways (BUA) | | BR | BUA | BRITISH UNITED | 1960 | 1970 | |
| British United Island Airways (BUIA) | | UK | | | 1968 | 1970 | Renamed British Island Airways |
| British Westpoint Airlines | | WP | | | 1963 | 1966 | |
| British World Airlines | | VF | BWL | BRITWORLD | 1993 | 2001 | See British United Air Ferries |
| Brooklands Aviation | | | | | 1933 | 1951 | Operated de Havilland Dragon Rapide |
| Brown Air Services | | | | | 1983 | 1987 | Renamed Capital Airlines (UK). Operated Cessna 441 Conquest II |
| Brymon Airways | | BC | BRY | BRYMON | 1972 | 2007 | Merged with British Regional Airlines and renamed British Airways Citiexpress |
| Brymon European Airways | | BC | BRY | | 1992 | 1993 | |
| Brymon Offshore Air Charter | | | | | 1999 | 1999 | Operated DHC 7 |
| Business Air | | | | | 1987 | 1996 | Based at Aberdeen; eventually evolved into bmi Regional |
| Buzz | | PL | BUZ | BUZZARD | 1999 | 2003 | Renamed Buzzaway |
| Buzzaway | | | UKA / BUZ | | 2003 | 2003 | Merged into Ryanair |
| By Air | | | | | 1919 | 1920 | Operated Armstrong Whitworth F.K.8 |
| C |
| C.L. Air Surveys | | | | | 1947 | 1959 | Operated Avro Anson, Handley Page Halifax |
| Cal Air International | | EN | CAI | CALJET | 1985 | 1988 | Renamed Novair International Airways |
| Caledonian Airways | | CA | | | 1961 | 1970 | Renamed Caledonian/BUA |
| Caledonian Airways (1988) | | KG | CKT | CALEDONIAN | 1988 | 1999 | Merged into JMC Air then Thomas Cook Airlines |
| Caledonian/BUA | | CA | | | 1970 | 1971 | Renamed British Caledonian |
| Cambrian Air Services | | | | | 1935 | 1955 | Renamed Cambrian Airways |
| Cambrian Airways | | CS | CAS | CAMBRIAN | 1955 | 1974 | Merged into British Airways |
| Capital Airlines | | BZ | CPG | CAPITAL | 1983 | 1990 | [citation needed] |
| CargoLogicAir | | P3 | CLU | FIREBIRD | 2015 | 2022 | Operated Boeing 747 |
| CASAIR | | | | | 1972 | 1982 | Operated Cessna Titan, Short 330 |
| CCF Aviation | | | | | 1963 | 1965 | Operated Piper Aztec |
| Cello Aviation | | | CLJ | CELLO | 2010 | 2018 | |
| Celtic Airways | | | CIC | CELTAIR | 1988 | 1993 | Became part of Airwork Services |
| Central Air Services | | | | | 1971 | 1973 | Operated Douglas DC-3, Piper Aztec |
| Centreline Air Services | | | | | 1978 | 1983 | Operated Cessna 310, Embraer Bandeirante, HS 748, Piper Navajo Chieftain |
| Channel Air Bridge | | | | | 1959 | 1962 | |
| Channel Air Ferries | | | | | 1936 | 1939 | Operated de Havilland Dragon |
| Channel Airways | | CW | | CHANNEL AIR | 1962 | 1972 | |
| Channel Islands Air Freight | | | | | 1940s | 1950s | Operated Miles Aerovan |
| Channel Island Airways | | | | | 1945 | 1947 | Formed by the merger of Jersey Airways and Guernsey Airways. Absorbed into British European Airways. Operated Bristol Freighter |
| Channel Express | | LS | EXS | CHANNEX | 1983 | 2006 | Renamed Jet2 |
| Chartair | | | | | 1946 | 1947 | Founded by Guy Lawrence. Renamed British American Air Services. Operated Handley Page Halifax |
| Chauffair | | | | | 1980 | 2001 | Jet charter business. Operated Hawker Siddeley HS.125 |
| Chieftain Airways | | PQ | | | 1986 | 1987 | Operated HS 748 |
| Chrisair | | | | | 1961 | 1968 | Operated DH.84, DH.89, Cessna 172, Piper Twin Comanche |
| Ciro Aviation | | | | | 1948 | 1948 | Took part in Berlin Airlift. Operated Douglas DC-3, DH.89 |
| Citelynx | | | | | 2005 | 2007 | |
| City Air Bus | | | | | 1994 | 1995 | Humberside to London City with two Dornier 228s, for three months.[citation needed] |
| City Star Airlines | | X9 | ISL | ISLANDIA | 2003 | 2008 | |
| CityFlyer Express | | CJ | CFE | FLYER | 1992 | 2002 | |
| Citywing | | | | | 2013 | 2017 | Established as Manx2 in 2006. Operated Let L-410 Turbolet |
| Classic Airways | | | CCN | CLASSIC JET | 1997 | 1998 | Operated Lockheed Tristar |
| Claydon Aviation | | | | | 1958 | 1959 | Operated Vickers VC.1 Viking |
| Club 328 | | | SDJ | SPACEJET | 2005 | 2008 | [citation needed] |
| Cobham Air Routes | | | | | 1935 | 1935 | Sold to Olley Air Service. Operated Westland IV |
| Cobham-Blackburn Airlines | | | | | 1929 | 1930 | Formed by the merger of Alan Cobham Aviation and North Sea Aerial and General Transport Company |
| Comed Aviation | | | | | 1994 | 2001 | Operated Embraer Bandeirante |
| Commercial Air Hire | | | | | 1935 | 1936 | Delivered newspapers to Europe. Operated Avro 642 Eighteen, de Havilland Dragon |
| Community Express Airlines | | 5V | UNI | COMMUNITY | 1993 | 1996 | [citation needed] |
| Continental Air Services | | | | | 1957 | 1960 | Operated Douglas C-54, Vickers VC.1 Viking |
| Continental Air Transport | | | | | 1957 | 1960 | Operated Douglas C-54, Vickers VC.1 Viking |
| Cougar Airlines | | | GCR | SPEEDCAT | 2001 | 2003 | |
| Court Line | | OU | | COURTLINE | 1969 | 1974 | Originally Argus Air Transport, then became Autair (Luton), then Autair International Airways |
| Crewsair | | | | | 1950 | 1951 | Operated Douglas DC-3, Vickers VC.1 Viking |
| Crilly Airways | | | | | 1930s | 1936 | Aircraft purchased by British Airways Ltd and used to form British Airways Iberia Ltd |
| Culliford Airlines | | | | | 1947 | 1949 | Operated Avro Anson, Miles Aerovan |
| Cunard Eagle Airways | | EG | | | 1960 | 1963 | Renamed/merged to British Eagle |
| D |
| Daimler Air Hire | | | | | 1919 | 1921 | Acquired Aircraft Transport and Travel to form Daimler Airway |
| Daimler Airway | | | | | 1922 | 1924 | Merged with British Marine Air Navigation Co Ltd, Instone Air Line and Handley Page Transport to form Imperial Airways |
| Dan-Air | | DA | DAN | DANAIR | 1953 | 1992 | Merged into British Airways |
| Dan-Air Skyways | | | | | 1972 | 1974 | Subsidiary of Dan-Air. Operated HS 748 |
| de Havilland Aeroplane Hire | | | | | 1922 | 1922 | Operated Airco DH.9C |
| Debonair | | 2G | DEB | DEBONAIR | 1993 | 1999 | |
| Denham Air Taxi Services | | | | | 1976 | 1980 | Established as Gregory Air Taxis in 1963. Operated Piper Aztec |
| Dennis Aviation | | | | | 1946 | 1956 | Operated Airspeed Consul, Avro Anson, Percival Proctor |
| Derby Airways | | | | | 1959 | 1964 | Renamed British Midland International. Operated Handley Page Marathon, Canadair Argonaut |
| Derby Aviation | | | | | 1949 | 1959 | Renamed Derby Airways |
| Devonair | | | | | 1952 | 1962 | Operated de Havilland Tiger Moth |
| Dominie Airways | | | | | 1967 | 1967 | Subsidiary of Treffield Aviation. Operated de Havilland Dragon Rapide |
| Don Everall Aviation | | | | | 1947 | 1960 | Merged into Air Safaris. Operated de Havilland Dragon Rapide, Douglas DC-3, Miles Messenger, Vickers VC.1 Viking |
| Donaldson International Airways | | DI | | DONALDSON | 1964 | 1974 | |
| Dragon Airways | | | | | 1953 | 1958 | Absorbed by Silver City Airways. Operated de Havilland Dragon Rapide, de Havilland Heron |
| Duo Airways | | VB | DUO | FLY DUO | 2003 | 2004 | |
| E |
| Eagle Airways (UK) | | EG | | | 1953 | 1960 | Renamed/merged to Cunard Eagle Airways |
| Eagle Aviation | | | | | 1948 | 1960 | Renamed Cunard Eagle Airways. Operated Avro York, Douglas DC-6A, Handley Page Halifax, Vickers VC.1 Viking |
| East Anglian Flying Services | | | | | 1947 | 1962 | Renamed Channel Airways |
| Eastern Air Transport | | | | | 1932 | 1934 | Founded by Michael Scott. Operated de Havilland Fox Moth |
| Eastern Airways (1997-2025) | | T3 | EZE | EASTERN | 1997 | 2025 | Entered administration |
| Eastern Airways (1972-1982) | | EN | | | 1972 | 1982 | Merged with Genair and CASAIR |
| Eastern Airways (1978-1981) | | CE / EN | | | 1978 | 1981 | |
| Edinburgh Air Charter | | | | | 1998 | 2006 | Renamed Air Charter Scotland. Operated Cessna 310, Cessna 402, Cessna 404 |
| Edinburgh Air Services | | | | | 1971 | 1979 | Operated Reims Cessna F172, Cessna 150 |
| Edwin Air Cargo | | | | | 2018 | 2019 | Operated Antonov An-26 |
| Elan Air | | | | | 1982 | 1989 | Renamed DHL Air UK |
| Emerald Airways | | | | | 1965 | 1967 | Acquired by Hibernian Airlines. Operated de Havilland Heron, Douglas C-53D[citation needed] |
| Emerald Airways | | G3 | JEM | GEMSTONE | 1992 | 2006 | |
| Emerald European Airways | | YE | | | 1994 | 1995 | |
| Eros Airlines | | | | | 1957 | 1964 | Operated Vickers VC.1 Viking |
| Euravia | | EY | | | 1961 | 1964 | Renamed Britannia Airways |
| Euroair Transport | | EZ / VC | URO / EUZ | | 1977 | 1997 | Operated Embraer Bandeirante |
| Euroceltic Airways | | 5Q | ECY | ECHELON | 2001 | 2003 | Operated Fokker F27, Fokker 50 |
| Eurocity Express | | II | ECE | | 1986 | 1988 | Founded by British Midland as Eurocity Express and renamed as London City Airways |
| Eurodirect | | 9R | EUD | | 1994 | 1995 | |
| Euroflite | | | | | 1980 | 1984 | Acquired by London European Airways. Operated BAe Jetstream 31, BAe 125, Cessna 404 |
| EuroManx | | 3W | EMX | CATCHER | 2002 | 2008 | |
| European Airways | | | | | 1995 | 2001 | Operated BAC 1-11, BAe Jetstream 31 |
| European Aviation Air Charter | | E7 | EAF | EUROCHARTER | 1994 | 2008 | Established as European Aviation in 1989 |
| European Skytime | | | | | 2000 | 2012 | |
| Euroscot Express | | MY | EUJ | SCOTAIR | 1997 | 2001 | Operated BAC 1-11, ATR 72 |
| Euroworld Airways | | | | | 1991 | 1992 | Renamed/merged to CityFlyer Express |
| Euroworld International Airline Operations | | | | | 1972 | 1988 | Operated Bristol Britannia |
| Excalibur Airways | | EQ | EXC | CAMELOT EXCALIBUR | 1992 | 1996 | |
| Excel Airways | | JN | XLA | EXPO | 2000 | 2006 | Renamed XL Airways UK |
| Executair | | | | | 1957 | 1961 | Operated Westland Widgeon |
| Executive Air Transport | | | | | 1960 | 1972 | |
| Executive Express | | EX | | | 1975 | 1982 | Operated Beech King Air, Cessna 421 |
| Express Air Freight | | | | | 1975 | 1980 | Operated Douglas DC-3 |
| Express Air Services | | LS | EXS | | 1978 | 1983 | Renamed Channel Express |
| Express Parcel Systems | | | | | 1983 | 1992 | Operated Fokker F27 |
| F |
| F & J Mann Airways | | | | | 1960 | 1961 | Renamed Westpoint Aviation. Operated Douglas DC-3 |
| Fairflight | | | | | 1950 | 1951 | Acquired by Surrey Flying Services |
| Fairflight Charters | | FC | | | 1968 | 1989 | Operated Shorts 360 |
| Falcon Airways | | | | | 1959 | 1961 | AOC revoked due to safety concerns |
| Federated Air Transport | | | | | 1954 | 1961 | Operated de Havilland Dragon Rapide, Avro Anson |
| Field Survey Flight | | | FAS | | 1989 | 1992 | Operated Fokker F27 |
| Finglands Aviation | | | | | 1950 | 1952 | Operated Avro Anson I |
| First Choice Airways | | DP | FCA | JETSET | 2003 | 2008 | Merged with Thomsonfly to create Thomson Airways |
| Flight One | | | | | 1973 | 1989 | Operated Scottish Aviation Twin Pioneer |
| Flight Refuelling | | | | | 1934 | 1953 | Operated Avro Lancaster |
| Flightline | | B5 | FLT | FLIGHTLINE | 1989 | 2008 | Contract passenger and ad hoc charters |
| Fly Europa | | | | | 2001 | 2002 | Operated Boeing 737-200 |
| Fly Salone | | 5L | | | 2015 | 2016 | |
| Flybe (1979–2020) | | BE | BEE | JERSEY | 1979 | 2020 | Entered administration |
| Flybe (2022-2023) | | BE | BEE | JERSEY | 2022 | 2023 | Entered administration |
| Flybmi | | BM | BMR | MIDLAND | 1987 | 2019 | Entered administration |
| Flyglobespan | | Y2 | GSM | GLOBESPAN | 2002 | 2009 | |
| Flying Colours Airlines | | MT | FCL | COLOURS | 1996 | 2000 | Merged with Caledonian Airways to form JMC Air |
| Flyjet | | F7 | FJE | ENVOY | 2002 | 2007 | |
| Flykeen Airways | | | JFK | KEENAIR | 2002 | 2005 | Became A2B Airways |
| FlyWhoosh | | W2 | WEA | | 2007 | 2007 | |
| FordAir | | | FOB | | 1996 | 2008 | Operated BAe 146-300, Avro RJ100 |
| FR Aviation | | | | | 1985 | 1995 | Operated Beech Super King Air |
| G |
| GB Airways | | GT | GBL | GEEBEE | 1981 | 2008 | |
| Genair | | EN | GEN | GENAIR | 1981 | 1984 | Operated British Caledonian Commuter Services |
| General Aviation Services | | | | | 1969 | 1975 | |
| Genesis Airways | | | | | 1994 | 1995 | Established as Prospair in 1990. Operated BAe Jetstream |
| Gibair | | | | | 1947 | 1981 | Renamed/merged to GB Airways[citation needed] |
| Gibraltar Airways | | GT | | GIBAIR | 1931 | 1989 | Operated Saro Windhover |
| Gill Airways | | 9C | GIL | GILLAIR | 1995 | 2001 | Established as Gill Aviation in 1969 |
| Gill Aviation | | | | | 1969 | 1989 | Renamed Gillair. Operated Cessna 402 |
| Gillair | | | | | 1989 | 1995 | Established as Gill Aviation in 1969. Renamed Gill Airways |
| Giro Aviation | | | | | 1920 | 1964 | Operated de Havilland Fox Moth, Avro Avian |
| Glass Eels | | | | | 1970 | 2012 | Operated Cessna 208 Caravan |
| Global Supply Systems | | XH | GSS | JET LIFT | 2001 | 2014 | |
| Glos-Air | | | | | 1970s | 1980s | Operated Westland Whirlwind |
| Go Fly | | GO | GOE | GO FLIGHT | 1998 | 2003 | |
| Guernsey Airlines[de] | | GE | GER | | 1977 | 1988 | Operated Vickers Viscount, Shorts 330 and 360, Handley Page Herald |
| Gold Air International | | | | | 1998 | 2010 | Executive charter airline. Established as HawkAir in 1994. Operated Bombardier Learjet 45 |
| Grahame-White Aviation Company | | | | | 1911 | 1919 | Established as Grahame-White, Blériot & Maxim in 1911. Operated Farman III, Blériot XI |
| Grayson Air Services | | | | | 1947 | 1947 | Operated Airspeed Consul |
| Great Western & Southern Airlines | | | | | 1938 | 1947 | Took over Channel Air Ferries routes. Absorbed into BEA. Operated de Havilland Dragon Rapide, Westland IV |
| Great Western Railway Air Services | | | | | 1933 | 1934 | Operated Westland IV |
| Gregory Air Services | | | | | 1963 | 1965 | Renamed Air Gregory. Operated Aero Commander 500, Hawker Siddeley HS-125, Douglas DC-3 |
| Guernsey & Jersey Airways | | | | | 1937 | 1940 | Operated de Havilland Express |
| Guernsey Airways | | | | | 1934 | 1945 | Merged with Jersey Airways to form Channel Island Airways. Absorbed into British European Airways. Operated Saro Windhover, Saro Cloud |
| H |
| Handley Page Transport | | | | | 1919 | 1924 | Merged with British Marine Air Navigation Co Ltd, Instone Air Line and Daimler Airway to form Imperial Airways |
| Harvest Air | | | | | 1974 | 1988 | Founded by Nigel Brendish. Operated Douglas DC-3, BN-2 Islander, Piper Aztec |
| HawkAir | | | | | 1974 | 1988 | Executive charter airline. Merged into Gold Air International. Operated Cessna 421, Piper Aztec |
| Haywards Aviation | | | | | 1970 | 1979 | Operated BN-2 Islander, de Havilland Dove |
| HD Air | | | RPX | RAPEX | 2007 | 2015 | Established as BAC Aircraft in 1992 |
| Heathrow Jet Charter | | | HJC | RHINOAIR | 1997 | 1998 | |
| Heavylift Cargo Airlines (UK) | | NP | HLA | HEAVYLIFT | 1980 | 2006 | Established as TAC Heavylift in 1978. Renamed HC Airlines. Operated Airbus A300, Boeing 707, Canadair CL-44, Douglas DC-8, Short Belfast |
| Highland Airways Limited | | | | | 1933 | 1937 | Merged to Scottish Airways and eventually British European Airways |
| Highland Airways | | 8H | HWY | HIWAY | 1991 | 2010 | |
| Highland Express Airways | | VY | TTN | TARTAN | 1986 | 1987 | |
| Hillman's Airways | | | | | 1931 | 1935 | Merged with Spartan Air Lines and United Airways Limited to form Allied British Airways |
| Hornton Airways | | | | | 1946 | 1950 | Operated Airspeed Consul, de Havilland Dragon Rapide, Douglas C-47A, Miles M.65 Gemini, Percival Proctor |
| Hot Air (UK) | | | | | 1988 | 1989 | Subsidiary of Baltic Airlines. Operated Vickers Viscount |
| Humber Airways | | HM | HUA | HUMBER AIR | 1968 | 1975 | Operated BN-2 Islander |
| Hunting Aerosurveys Ltd | | | | | 1944 | 1960 | Founded by Percy Hunting. Merged with Hunting Geophysics to form Hunting Surveys |
| Hunting Air Travel[de] | | | | | 1945 | 1951 | Operated Vickers Viking; replaced by Hunting Air Transport[de] |
| Hunting Air Transport[de] | | | | | 1951 | 1953 | replaced by Hunting-Clan Air Transport |
| Hunting Cargo Airlines | | AG | ABR | CONTRACT | 1992 | 1998 | Renamed Air Contractors |
| Hunting-Clan Air Transport | | HC | | | 1951 | 1960 | Founded as Hunting Air Travel[de]. Merged with Airwork Services to form British United Airways |
| Hunting Geophysics | | | | | 1956 | 1960 | Merged with Hunting Aerosurveys to form Hunting Surveys |
| Hunting Surveys | | | | | 1960 | 2001 | Formed by the merger of Hunting Aerosurveys with Hunting Geophysics |
| I |
| IAS Cargo Airlines | | FF | | | 1967 | 1979 | |
| Imperial Airways | | | | | 1924 | 1939 | Merged with British Airways Ltd to form British Overseas Airways Corporation (BOAC) |
| Independent Air Transport | | | | | 1954 | 1958 | Renamed Blue-Air. Operated Avro Anson, de Havilland Dragon Rapide, de Havilland Dove, Douglas DC-4, Vickers VC.1 Viking |
| Inland Flying Service | | | | | 1929 | 1931 | Renamed Portsmouth, Southsea & Isle of Wight Aviation |
| Inner Circle Air Lines | | | | | 1935 | 1935 | |
| Instone Air Line | | | | | 1919 | 1924 | Merged with British Marine Air Navigation Co Ltd, Handley Page Transport and Daimler Airway to form Imperial Airways |
| Instone Air Line (1981) | | | | | 1981 | 1996 | Operated Bristol Freighter |
| Inter City Airlines | | QA | | | 1981 | 1983 | Established as Alidair in 1972. Operated Cessna Citation II, Short 330, Vickers Viscount |
| Inter European Airways | | IP | IEA | ASPRO | 1986 | 1993 | Merged with Airtours International |
| Interflight | | | | | 1985 | 2018 | Established as Berrad Aviation in 1974. Operated BAe 125, Learjet 35 |
| Interline | | | | | 1994 | 1996 | Established as Aztec Charter in 1993. Operated Jetstream 31 |
| International Air Charter | | | | | 1971 | 1973 | Operated Douglas DC-3, Piper Aztec, Vickers Viscount |
| International Air Freight | | | | | 1937 | 1938 | Operated Curtiss T-32 Condor II |
| International Airways | | | | | 1946 | 1949 | Operated Airspeed Consul, Avro Anson, de Havilland Dragon Rapide |
| Intra Airways | | JY | | | 1969 | 1979 | |
| Invicta Air Cargo | | | | INDIA MIKE | 1964 | 1969 | Merged with BMA and became cargo division.Operated Bristol Britannia, Douglas C-54B |
| Invicta Airlines | | | | | 1964 | 1971 | Renamed Invicta International Airlines |
| Invicta International Airlines | | IM | | INVICTA | 1971 | 1981 | Assets sold to Seabourne Aviation |
| Irelfly | | | | | 1966 | 1966 | Operated Douglas C-47B |
| Island Air Charters (UK) | | | | | 1947 | 1947 | Operated de Havilland Dragon Rapide |
| Island Air Services | | | | | 1947 | 1959 | Operated de Havilland Dragon Rapide |
| Isle of Man Air Services | | | | | 1937 | 1947 | |
| Isles of Scilly Skybus | | 5Y | IOS | | 1984 | 2008 | Renamed Skybus. Operated BN-2 Islander |
| J |
| J-MAX | | | | | 2000s | 2000s | Operated Hawker 800 |
| Janes Aviation (1987-1992) | | | | | 1987 | 1992 | Operated Douglas DC-3, Dart Herald |
| Janes Aviation (2006-2010) | | | JAN | JANES | 2006 | 2010 | Operated Hawker Siddeley HS 748 |
| Janus Airways | | | | | 1982 | 1987 | Acquired by Euroair. Operated Vickers Viscount, Dart Herald |
| Jersey Air Ferries | | | | | 1983 | 1984 | Operated Vickers Viscount |
| Jersey Airlines | | JY | | | 1948 | 1963 | Absorbed by British United Island Airways |
| Jersey Airways | | | | | 1933 | 1945 | To British European Airways |
| Jersey European Airways | | BE | JEA | JERSEY | 1979 | 2000 | Renamed British European |
| Jersey Ferry Airlines | | | | | 1982 | 1987 | Operated BN-2 Islander, de Havilland Heron, Scottish Aviation Twin Pioneer |
| Jetstream Express | | JX | JXT | VANNIN | 2007 | 2007 | |
| jetXtra.com | | | | | 2012 | 2017 | Virtual airline |
| JJ Airways | | | | | 2001 | 2001 | Founded by Keith Newnham. Renamed Cougar Air Cargo. Operated Boeing 727-200 |
| JMC Air | | MT | JMC | TOPJET | 2000 | 2003 | Rebranded to Thomas Cook Airlines |
| Jota Aviation | | | ENZ | ENZO | 2009 | 2022 | Ceased operations |
| K |
| Kearsley Airways | | | | | 1946 | 1950 | Took part in the Berlin airlift. Operated Douglas C-47B |
| Keegan Aviation | | | | | 1961 | 1964 | Operated Canadair North Star, Cessna 310, de Havilland Dove, De Havilland Dragon Rapide |
| Keenair Charter | | 5Q | JKF | KEENAIR | 1968 | 2002 | Renamed Flykeen Airways. Operated Embraer Bandeirante |
| Kemps Aerial Survey | | | | | 1964 | 1969 | Operated Avro Anson, Reid and Sigrist R.S.4 single aircraft built |
| Kestrel International | | | | | 1971 | 1972 | Operated Douglas DC-3, Vickers Viscount |
| KLM uk | | UK | UKA | | 1999 | 2002 | Merged with KLM Cityhopper |
| Knight Air | | | KNT | | 1994 | 1997 | Established as Knightway Air Charter in 1982. Fatal crash on 24 May 1995 of scheduled flight Leeds to Aberdeen. Operated Cessna 550 Citation II, Embraer Bandeirante |
| Kondair Cargo | | | | | 1977 | 1989 | Taken over by TNT Aviation Services. Operated Britten-Norman Trislander, Cessna 404 Titan |
| L |
| Laker Airways | | GK | LKR | LAKER | 1965 | 1982 | |
| Lakeside North West | | | LKS | | 1992 | 1993 | Operated BAe Jetstream 31 |
| Lancashire Aircraft Corporation | | | | | 1946 | 1958 | Acquired by Silver City Airways. Operated Airspeed Consul, Avro York, Bristol Freighter, de Havilland Express, de Havilland Dragon Rapide, Douglas C-47B, Handley Page Halifax, Percival Proctor |
| Lanzair | | | | | 1973 | 1976 | Operated Lockheed L-649 Constellation |
| LeCocq's Airlink | | | | | 1999 | 2003 | Renamed Rockhopper Airlines. Operated BN-2 Islander, Trislander |
| Leisure International Airways | | MV | UKL | LEISURE | 1993 | 1998 | Merged into Air 2000 |
| Lennard Aviation | | | | | 1964 | 1966 | Operated Piper Aztec, Piper Twin Comanche, BN-2 Islander |
| Links Air | | | LNQ | FASTLINK | 1983 | 2016 | Operated BAe Jetstream 31 |
| Little Red | | VS | VIR | VIRGIN | 2013 | 2015 | |
| Lloyd International Airways | | LW | | | 1961 | 1972 | |
| Loch Lomond Seaplanes | | | | | 2007 | 2025 | Ceased trading |
| London Aero and Motor Services | | | | | 1946 | 1947 | Founded by Graham Humby. Merged with the South African charter airline Alpha Airways. Operated Handley Page Halifax |
| London City Airways | | II | LCY | STOL | 1986 | 1990 | Founded by British Midland as Eurocity Express and later reabsorbed by British Midland |
| London European Airways | | UQ | LON | EUROPEAN | 1986 | 1991 | Operated for a while as Ryanair Europe. |
| London, Scottish & Provincial Airways | | | | | 1934 | 1934 | 1934 crash. Operated Airspeed Courier |
| Love Air | | 4J | LOV | LOVEAIR | 1991 | 2000 | Operated BAe Jetstream 31 |
| Lundy & Atlantic Air Services | | | | | 1936 | 1936 | Operated Short Scion |
| Luton Airways | | | | | 1958 | 1959 | Operated de Havilland Dragon Rapide |
| Luxury Air Tours | | | | | 1932 | 1933 | Operated de Havilland Dragon |
| Lynton Aviation | | | LYN | LYNTON | 1987 | 2003 | Founded by Christopher Tennant. Established as Magec Aviation in 1985. Operated Eurocopter AS355 Écureuil 2, BAe 125, Mitsubishi MU-300 Diamond |
| M |
| Macavia International Corporation | | | | | − | − | Operated HS 748, Douglas C-118 |
| Macedonian Aviation | | | | | 1972 | 1974 | Founded by Roger Byron-Collins. Operated de Havilland Dove, Douglas DC-3 |
| Maersk Air UK | | VB | MSK | BLUESTAR | 1993 | 2003 | Renamed Duo Airways[citation needed] |
| Magec Aviation | | | MGC | MAGEC | 1982 | 1999 | Merged into Lynton Aviation. Operated BAe 125, Falcon 900 |
| Maitland Air Charters | | | | | 1959 | 1960 | Founded by Jock Maitland. Renamed Maitland Drewery. Operated Aero Ae-45, Percival Prentice, Percival Proctor |
| Maitland Drewery | | | | | 1960 | 1961 | Operated Aero Ae-45, Vickers Viscount, Vickers VC.1 Viking |
| Malinair | | WG | MAK | MALIN | 1985 | 1987 | [citation needed] |
| Manchester Aviation | | | | | 1921 | 1923 | Operated Airco DH.6 |
| Mannin Airways | | | | | 1948 | 1949 | Merged with Ulster Aviation to form North West Airlines. Operated de Havilland Dragon Rapide |
| Manx Air Charters | | | | | 1947 | 1953 | Renamed Manx Airlines (1953). Operated de Havilland Dragon Rapide |
| Manx Airlines (1953) | | | | | 1953 | 1958 | Established as Manx Air Charters. Acquired by Silver City Airways |
| Manx Airlines | | JE | MNX | MANX | 1982 | 2002 | |
| Manx Airlines Europe | | JE | MXE | EUROMANX | 1995 | 1996 | Renamed/merged to British Regional Airlines / British Airways Express[citation needed] |
| Manx2 | | NM | BPS | | 2006 | 2013 | Renamed Citywing |
| Markoss Aviation | | | MKO | | 2001 | 2008 | Operated BAe 125, BAe 125 800, Bombardier CRJ200 |
| Martini Airfreight Services | | | INI | | 1996 | 1999 | Renamed Benair. Operated Cessna Grand Caravan |
| Mayflower Air Services | | | | | 1961 | 1964 | Acquired by British Westpoint Airlines. Operated de Havilland Dragon Rapide |
| McAlpine Aviation | | | MAL | | | 1992 | |
| Mediterranean Express | | | MEE | | 1986 | 1988 | Acquired by Trans European Airways. Operated BAC 1-11 |
| Melba Airways | | | | | 1949 | 1952 | Operated Airspeed Consul, de Havilland Dove, de Havilland Dragon Rapide |
| Mercury Airlines | | | | | 1957 | 1964 | Established as Overseas Air Transport (Jersey). Acquired by British Midland. Operated Douglas DC-3, de Havilland Heron |
| Meredith Air Transport | | | | | 1952 | 1954 | Became Air Safaris. Operated a single Douglas DC-3 |
| Meridian Airmaps | | | | | 1952 | 1989 | Aerial survey. Went in liquidation. Operated Avro Anson, Miles Aerovan |
| Merlin Air Services | | | | | 1952 | 1989 | Operated Cessna Caravan |
| Merlot International Aviation | | | | | 1972 | 1974 | Operated BAe 125, Agusta-Bell 206 |
| Metropolitan Air Movements | | | | | 1960 | 1964 | Operated de Havilland Heron, de Havilland Dove, de Havilland Dragonfly |
| Metropolitan Airways | | | | | 1982 | 1985 | Established as Alderney Air Ferries. Operated BN-2 Islander, DHC-6 Twin Otter, Short 330 |
| Mid-Fly | | | | | 1964 | 1966 | Operated de Havilland Dragon Rapide, Piper Aztec, Piper Tri-Pacer, Piper Colt, Piper Cherokee |
| Midland Air Cargo | | | | | 1970 | 1973 | Operated Bristol Freighter |
| Midland & Scottish Air Ferries | | | | | 1933 | 1934 | Scotland's first airline |
| MK Airlines | | 7G | BGB | BRITISH GLOBAL | 2006 | 2010 | |
| Modern Transport | | | | | 1949 | 1950 | Operated de Havilland Dragon Rapide |
| Monarch Airlines | | ZB | MON | MONARCH | 1967 | 2017 | Entered administration |
| Morton Air Services | | | | | 1945 | 1967 | Absorbed into British United Island Airways |
| Mossair | | | | | 1975 | 1980 | Established as Alderney Air Charter in 1964. Operated de Havilland Dove |
| Murray Chown Aviation | | | | | 1949 | 1953 | Acquired by Cambrian Air Services. Operated de Havilland Dragon Rapide, Percival Proctor |
| MyTravel Airways | | VZ | MYT | KESTREL | 2002 | 2008 | Merged into Thomas Cook Airlines |
| MyTravelLite Airlines | | VZ | MYL | MY LITE | 2002 | 2005 | Reintegrated into its parent airline MyTravel Airways |
| N |
| National Airways (UK) | | | | | 1982 | 1988 | Renamed National Commuter Airways. Operated Beech King Air, Beech Baron, Trislander, Embraer Bandeirante, Short 330 |
| National Commuter Airways | | | | | 1988 | 1989 | Acquired by Region Airways. Operated Embraer Brasilia, Short 330, Short 360 |
| Newman Airways | | | | | 1945 | 1951 | Operated de Havilland Dragon Rapide |
| Nexus Airlines | | | | | 2005 | 2005 | |
| Norfolk Airways | | | | | 1950 | 1970 | Merged with Anglian Air Charter and Rig Air to form Air Anglia. Operated Piper Aztec |
| North Eastern Airways | | | | | 1935 | 1947 | Absorbed into BEA. Operated Airspeed Envoy, de Havilland Dragon Rapide |
| North Sea Aerial & General Transport Company | | | | | 1919 | 1936 | Established as North Sea Aerial Navigation Company. Operated Blackburn Segrave, Blackburn Kangaroo |
| North Sea Air Transport | | | | | 1946 | 1949 | Operated Avro Anson, de Havilland Dragon Rapide, Lockheed 12A, Lockheed 14 |
| North West Airlines (UK) | | | | | 1949 | 1957 | Formed by the merger of Mannin Airways and Ulster Aviation. Operated Miles Aerovan, de Havilland Dragon Rapide, Douglas C-47A |
| North-South Airlines | | | | | 1959 | 1962 | Operated de Havilland Heron |
| Northair | | NT | | | 1964 | 1979 | Acquired by Capital Airlines (UK), Operated Piper Aztec, Piper Twin Comanche |
| Northeast Airlines | | NS | | NORJET | 1970 | 1976 | Merged into British Airways |
| Northern & Scottish Airways | | | | | 1934 | 1937 | Merged to Scottish Airways and eventually British European Airways |
| Northern Air Charter | | | | | 1947 | 1948 | Operated Airspeed Consul, de Havilland Dragon Rapide |
| Northern Air Lines | | | | | 1924 | 1925 | Went into liquidation. Operated Airco DH.9, de Havilland DH.50 |
| Northern Air Transport | | | | | 1929 | 1932 | Founded by John Leeming. Operated Avro 504 |
| Northern Airlines (UK) | | | TLR | | 1991 | 1994 | Operated BN-2 Islander |
| Northern Aviation | | | | | 2004 | 2009 | Operated Beech Super King Air, Piper Seneca, Cessna Golden Eagle |
| Northern Executive Aviation | | | NEX | NEATAX | 1962 | 2013 | Operated Beech Super King Air, BN-2 Islander, Falcon 900, Learjet 35, Piper Aztec, Piper Twin Comanche |
| Norwegian Air UK | | DI | NRS | RED NOSE | 2015 | 2021 | Merged into Norse Atlantic UK |
| Novair International Airways | | EN | NGK | STARJET | 1988 | 1990 | |
| O |
| Olley Air Service | | | | | 1934 | 1947 | Operated de Havilland Dragon Rapide, de Havilland Dove |
| OpenSkies | | EC | BOS | MISTRAL | 2007 | 2009 | |
| Orion Airways (1956) | | | | | 1956 | 1960 | Founded by Captain Peter Palmer. Blackbushe Airport based. Operated Vickers VC.1 Viking |
| Orion Airways | | KG | ORN | ORION | 1979 | 1989 | East Midlands Airport based Jet operator |
| OurJet | | | | | 2003 | 2003 | Operated BAe 125 |
| Overseas Aviation | | | | | 1957 | 1961 | Operated Canadair C-4 Argonaut, Vickers VC.1 Viking |
| Oxford Aero Charter (Oxaero) | | | | | 1998 | 2001 | Operated Cessna Citation, Piper Navajo Chieftain |
| P |
| Palmair European | | | | | 1999 | 2010 | |
| Palmair Flightline | | | | | 1993 | 1999 | Renamed Palmair European. Operated BAe 146 |
| Paramount Airways | | QJ | PAT | PARAMOUNT | 1987 | 1989 | Entered receivership |
| Peach Air | | KG | KGC | GOLDCREST | 1997 | 1998 | Merged with Flying Colours Airlines to form JMC Air |
| Pegasus Airlines (UK) | | | | | 1959 | 1961 | Operated Vickers VC.1 Viking |
| Pelican Cargo | | | | | 1978 | 1981 | Operated Boeing 707 |
| Peregrine Air Services | | PJ | PSS | | 1969 | 1990 | Operated BAe Jetstream 31, Beech Super King Air, Cessna Titan, Grumman Gulfstream I, Piper Aztec |
| Peters' Aviation | | NP | | | 1969 | 1979 | Operated de Havilland Dove, de Havilland Heron, Piper Cherokee |
| Platinum Air 2000 | | | | | 1998 | 2001 | Operated BAe Jetstream 31, Beech Super King Air, Cessna Citation II |
| Platinum Air Charter Executive | | | PLM | PLATINUM EXEC | 1999 | 2001 | Operated BAe Jetstream 31 |
| Polar Airways[de] | | | | | 1982 | 1983 | Operated Vickers Viscounts |
| Polyfoto Air Taxi Services | | | | | 1963 | 1966 | Operated Piper Apache, Piper Twin Comanche, Cessna Skylark |
| Portsmouth, Southsea & I.O.W. Aviation | | | | | 1932 | 1939 | Established as Inland Flying Service. Renamed Portsmouth Aviation. Operated Westland IV |
| Prime Airlines | | | PRM | PRIME AIR | 2001 | 2002 | Formed by HeavyLift Cargo Airlines |
| Princess Air | | 8Q | PRN | WHISPERJET | 1989 | 1991 | Charter airline passenger/freight with two aircraft |
| Progressive Airways | | | | | 1970 | 1971 | Established as Tyler Aviation. Operated de Havilland Dove, de Havilland Heron |
| Prospair | | | | | 1990 | 1994 | Renamed Genesis Airways. Operated BAe Jetstream 31 |
| Provincial Airways | | | | | 1933 | 1935 | |
| Q |
| Quest Airlines | | | | | 2004 | 2005 | Operated BAe Jetstream 31 |
| R |
| Railway Air Services | | | | | 1933 | 1947 | Nationalised and merged into British European Airways |
| Redcoat Air Cargo | | RY | | | 1977 | 1982 | |
| Reed Aviation (UK) | | | | | 1996 | 2006 | Operated HS 748 |
| Regionair | | JA | RGL | | 1987 | 1991 | Scheduled passenger Southend to Brussels/Rotterdam/Paris |
| Rig Air | | | | | 1970 | 1970 | Merged with Anglian Air Charter and Norfolk Airways to form Air Anglia. Operated Douglas C-47 |
| RM Aviation | | | RMN | | 1974 | 1999 | Operated Beech King Air, Cessna Citation V |
| Rockhopper Airlines | | | | BLUE ISLAND | 2003 | 2006 | Renamed Blue Islands |
| Ryburn Air | | | | | 1974 | 1979 | Operated Hughes 369, Partenavia P.68 |
| S |
| Sabre Airways | | JN | SBE | SABRE | 1994 | 2001 | Renamed XL Airways UK |
| Sagittair | | | | | 1969 | 1972 | Operated Beech D18S, AW.660 Argosy |
| Sandown and Shanklin Flying Services | | | | | 1935 | 1936 | Founded by Ernest Byrne. Acquired Shanklin Flying Services |
| Scillonia Airways | | | | | 1966 | 1969 | Seasonal services. Operated de Havilland Dragon Rapide |
| Scillonian Air Services | | | | | 1963 | 1964 | Operated Aero Commander 500 |
| Scimitar Airlines | | JA | | | 1979 | 1982 | |
| ScotAirways | | CB | SAY | | 1999 | 2011 | Renamed Suckling Airways |
| Scottish Airlines | | | | | 1946 | 1961 | Prestwick based |
| Scottish Airways | | | | | 1937 | 1947 | Merged into British European Airways |
| Scottish European Airways | | WW | SEU | | 1988 | 1990 | Established as Scottish Executive Airways in 1984. Operated HS 748 |
| Securicor Air | | | | | 1983 | 1990 | Operated Beech Baron, Dart Herald, Piper Navajo Chieftain |
| SelectAir | | | | | 2004 | 2006 | Operated Piper Chieftain |
| Severn Airways | | | | | 1975 | 1975 | Went in liquidation. Operated de Havilland Dove |
| SFC Air Taxis | | | | | 1992 | 1998 | Operated Piper Seneca |
| Shanklin Flying Services | | | | | 1992 | 1998 | Acquired by Sandown and Shanklin Flying Services. Operated Spartan Cruiser |
| Shortcut Airlines | | | | | 1958 | 1960 | Renamed Air Condor. Operated Bristol Freighter |
| Silver City Airways | | SS | | | 1947 | 1962 | Became part of British United Air Ferries |
| Silverjet | | Y7 | SLR | SILVERJET | 2006 | 2008 | Bankruptcy, business class only |
| Sivewright Airways | | | | | 1946 | 1951 | Operated Avro Anson, de Havilland Dragon Rapide, Douglas DC-3, Miles Aerovan, Miles Gemini |
| Sky Charters | | | | | 1962 | 1965 | Operated de Havilland Dove |
| Sky-Trek Airlines | | 5Q | STD | | 1997 | 2000 | Renamed LyddAir |
| Skydrift Air Charter | | | SDL | | 2004 | 2010 | Operated Embraer Bandeirante, Piper Aztec, Piper Navajo Chieftain |
| Skysouth | | | SDL | | 2006 | 2009 | |
| Skyways Coach-Air Limited | | SX | | | 1956 | 1971 | Renamed Skyways International |
| Skyways International | | SY | | | 1971 | 1972 | |
| Skyways Limited | | | | | 1946 | 1962 | Taken over by Euravia |
| Solair Flying Services | | | | | 1962 | 1964 | Operated de Havilland Dragon Rapide |
| Somerton Airways | | | | | 1946 | 1951 | Founded by Russell Gunton Ltd. Acquired by Morgan Aviation. Renamed Somerton Airways. Operated Percival Proctor, Austers, de Havilland Dragon Rapide |
| South Coast Airways | | | GAD | | 1995 | 2002 | Operated Douglas DC-3 |
| South East Air (SEA) | | XX | | | 1987 | 1988 | Operated Dart Herald |
| South West Aviation | | UX | | | 1966 | 1973 | |
| Southampton Air Services | | | | | 1946 | 1946 | Operated Douglas DC-2 |
| Southern Aircraft | | | | | 1946 | 1946 | Operated Avro Anson, de Havilland Dragon Rapide |
| Southern Airways Ltd | | | | | 1936 | 1939 | |
| Southern International Air Transport | | CS | | | 1974 | 1983 | Operated Vickers Viscount |
| Spacegrand | | | | | 1979 | 1985 | Amalgamated into Jersey European Airways. Operated DHC-6 Twin Otter |
| Spartan Air Lines | | | | | 1933 | 1935 | Merged with United Airways Limited to form British Airways Ltd |
| Starways | | | | | 1948 | 1963 | Acquired by British Eagle |
| Strathallan Air Services | | | | | 1966 | 1967 | Operated Douglas C-47B |
| Streamline Aviation | | | SSW | STREAMLINE | 1980 | 2002 | Acquired by Emerald Airways. Operated Short 330, Short 360 |
| Suckling Airways | | CB | SAY | SUCKLING | 1984 | 2013 | Integrated into its parent company Loganair |
| Sunjet Airlines | | | SUJ | SUNJET | 2002 | 2003 | Renamed Now Airlines. Operated Boeing 737-300 |
| Surf Air Europe | | | FLJ | | 2017 | 2018 | Parent company of the US Surf Air. Operated Embraer Phenom 300 |
| T |
| TAC Heavylift | | | | | 1978 | 1980 | Renamed HeavyLift Cargo Airlines. Operated Short Belfast |
| TBG Airways | | | | | 1996 | 1997 | Operated Lockheed Tristar |
| TEA UK | | EQ | TUK | | 1989 | 1991 | Operated Boeing 727-200 |
| Tempair International Airlines | | | | | 1972 | 1976 | |
| Thomas Cook Airlines | | MT | TCX | THOMAS COOK | 2003 | 2019 | Entered liquidation |
| Thomson Airways | | BY | TOM | TOMSON | 2008 | 2016 | Renamed TUI Airways |
| Thomsonfly | | BY | TOM | | 2005 | 2008 | Merged with First Choice Airways to form Thomson Airways |
| Thurston Aviation | | HZ | | | 1968 | 1989 | Operated Piper Navajo, Beech Super King Air, Piper Apache, Percival Prentice |
| Tippers Air Transport | | | | | 1964 | 1967 | Operated Avro Anson |
| TMAC Seabird Air Cargo | | | | | 1972 | 1975 | Operated Canadair CL-44 |
| TNT Aviation Services | | | | | 1987 | 2000 | Subsidiary of TNT Express. Operated Airbus A300B4 |
| Tradair | | | | | 1957 | 1962 | Taken over by Channel Airways, Southend based, Viking aircraft |
| Tradewinds Airways | | IK | IKA | TRADEWINDS | 1967 | 1990 | |
| Trans Euro Air | | | | | 2004 | 2009 | Operated ATR 42-300F, Cessna Titan, Piper Navajo |
| Trans European Aviation | | | | | 1959 | 1962 | Renamed Trans European Airways in 1961 |
| Trans Meridian Flying Services | | | | | 1962 | 1979 | Renamed Transmeridian Air Cargo. Operated Canadair CL-44, Douglas DC-6, Douglas DC-7 |
| Trans World Charter | | | | | 1948 | 1951 | Operated Vickers VC.1 Viking |
| Transair | | | | | 1947 | 1960 | Absorbed into British United Airways (BUA) |
| Transglobe Airways | | | | | 1959 | 1968 | Operated Bristol Britannia, Canadair CL-44 |
| Transmeridian Air Cargo | | KK | | TRANSMERIDIAN | 1971 | 1981 | Merged with IAS Cargo Airlines to form British Cargo Airlines |
| Treffield Aviation | | | | | 1965 | 1966 | Founded by Lord Trefgarne and Charles Masefield. Renamed Treffield International and declared bankruptcy in 1967. Operated Avro Anson |
| Trent Valley Aviation | | | | | 1946 | 1948 | Based at Nottingham Airport. Took part in the Berlin Airlift. Operated Douglas DC-3 |
| Tyler Aviation | | | | | 1970 | 1970 | Renamed Progressive Airways. Operated de Havilland Dove, de Havilland Heron |
| Tyne Tees Air Charter | | | | | 1960 | 1962 | Renamed Tyne Tees Airways. Operated de Havilland Dove, de Havilland Dragon Rapide |
| U |
| UK International Airlines | | IH | UKI | MAGENTA | 2005 | 2007 | [citation needed] |
| Ulster Aviation | | | | | 1946 | 1949 | Merged with Mannin Airways to form North West Airlines (UK) |
| United Airways Limited | | | | | 1934 | 1935 | Merged into Allied British Airways |
| V |
| Varsity Express | | | | | 2010 | 2010 | |
| Venture Airways | | CD | ACK | | 1984 | 1984 | Established as Air Commuter. Operated HS 748 |
| Veritair | | | | | 1982 | 2008 | Established as Air Commuter. Operated HS 748 |
| Vernair | | VC | ATS | | 1967 | 1986 | Transported racehorses. Operated Short Skyvan |
| Virgin Atlantic Little Red | | VS | VIR | VIRGIN | 2013 | 2015 | Operated on a wet-lease by Aer Lingus |
| Virgin Sun Airlines | | V2 | VIR | VIRGIN | 1998 | 2001 | Sold to Air 2000 |
| W |
| Waves | | | | | 2016 | 2018 | |
| Welsh Airways | | | | | 1985 | 1988 | Operated Partenavia P.68 |
| Westair International | | | | | 1989 | 1994 | Operated Dart Herald |
| Western Airways | | | | SHOVEL | 1932 | 1940 | Continued non-airline operations until 1978 |
| Western Airways (Norman Edgar) | | | | | 1934 | 1938 | Established as Bristol Air Taxi. Renamed Western Airways. Operated de Havilland Puss Moth, de Havilland Dragon |
| Western Aviation (UK) | | | | | 1928 | 1928 | Operated Avro 504 |
| Westminster Airways | | | | | 1946 | 1949 | |
| Westpoint Aviation | | | | | 1960 | 1963 | Established as F & J Mann Airways in 1960. Renamed British Westpoint Airlines. Operated de Havilland Dragon Rapide, Douglas DC-3 |
| Westward Airways | | | | | 1971 | 2009 | |
| Whoosh | | W2 | | | 2007 | 2007 | Formed in partnership with White Eagle Aviation, Poland. Started services 29 May 2007 using White Eagle's AOC. Ceased all ops on 9 December 2007. |
| Wight Airlines | | | | | 2006 | 2006 | Operated BN-2 Islander, Piper Navajo |
| William Dempster | | | | | 1947 | 1953 | Operated Avro Tudor |
| Willowair | | | WLO | WILLOWAIR | 1992 | 1996 | Acquired by Streamline Aviation. Operated Embraer Bandeirante |
| Wolverhampton Aviation | | | | | 1948 | 1954 | Merged into Derby Aviation. Operated Miles Gemini, Miles Hawk Trainer, de Havilland Dragon Rapide |
| World Air Freight | | | | | 1947 | 1948 | Operated Handley Page Halifax |
| World Airlines | | W2 | WRD | ECLIPSE | 1995 | 1996 | |
| X |
| XL Airways UK | | JN | XLA | EXPO | 2006 | 2008 | Bankruptcy, was Sabre Airways |
| Y |
| Yeoward Line Aviation | | | | | 1972 | 1982 | Subsidiary of Yeoward Brothers Ltd. Operated Piper Seneca |
| Yorkshire European Airways | | | | | 1992 | 1993 | Operated Embraer Bandeirante Flights between Southampton, Leeds/Bradford and Edinburgh |
| Z |
| Zoom Airlines Limited | | ZX | UKZ | FLYZOOM | 2007 | 2008 | |