| 1 | Delta Air Lines, INC. | Unitedkingdom | Shepherd'S Bush | Metro Building | London | W6 8DL | N/A | 1964 | $58,048,000,000 | 74,000 | N/A | N/A | N/A |
| 2 | United Airlines, INC. | Unitedkingdom | Eastcote and East Ruislip | 1 World Business Centre Heathrow | London | TW6 2FA | N/A | 1994 | $57,063,000,000 | 107,300 | N/A | N/A | N/A |
| 3 | American Airlines INC | Unitedkingdom | West Drayton | Waterside | London | UB7 0GB | americanairlines.***** | 1982 | $54,204,000,000 | 797 | N/A | N/A | N/A |
| 4 | International Consolidated Airlines Group, S.A. | Unitedkingdom | West Drayton | Waterside (haa2), Po Box 365 | London | UB7 0GB | iairgroup.***** | 2011 | $32,014,556,863 | 69,762 | N/A | N/A | N/A |
| 5 | Qatar Airways Group Q.c.s.c. | Unitedkingdom | Marylebone | Qatar Airways House | London | W1S 2QR | qatarairways.***** | 2004 | $23,528,397,076 | 640 | N/A | N/A | N/A |
| 6 | Societe Air France | Unitedkingdom | Hatton | Plesman House | London | TW14 9RL | airfrance.***** | 1933 | $18,736,151,234 | 200 | N/A | N/A | N/A |
| 7 | British Airways PLC | Unitedkingdom | Harmondsworth | Waterside | London | UB7 0GB | mybapension.***** | 1983 | $18,467,591,376 | 40,521 | N/A | N/A | N/A |
| 8 | Deutsche Lufthansa Aktiengesellschaft | Unitedkingdom | Eastcote and East Ruislip | World Business Centre | London | TW6 2FA | N/A | 1955 | $16,830,292,266 | 35,517 | N/A | N/A | N/A |
| 9 | Air Canada | Unitedkingdom | Feltham | Po Box 447 | London | TW13 9DZ | aircanada.***** | 1948 | $15,864,076,160 | 37,100 | N/A | N/A | N/A |
| 10 | Qantas Airways LIMITED | Unitedkingdom | Shepherd'S Bush | Qantas Airways Ltd | London | W6 8BJ | qantas.***** | 1934 | $14,520,853,686 | 6,000 | N/A | N/A | N/A |
| 11 | Singapore Airlines LIMITED | Unitedkingdom | Chiswick | Building 11 Chiswick Park | London | W4 5YS | singaporeair.***** | 1972 | $14,151,684,966 | 617 | N/A | N/A | N/A |
| 12 | Cathay Pacific Airways LIMITED | Unitedkingdom | Hammersmith | Waterfront | London | W6 9RU | cathaypacific.***** | 1965 | $13,413,865,291 | 30,100 | N/A | N/A | N/A |
| 13 | K.L.M. Royal Dutch Airlines | Unitedkingdom | Hatton | Plesman House | London | TW14 9RL | klm.***** | 1935 | $13,098,000,550 | 29,186 | N/A | N/A | N/A |
| 14 | Korean Air Lines CO. LIMITED | Unitedkingdom | Marylebone | 61 Curzon Street | London | W1J 8PD | koreanair.***** | 1969 | $12,831,175,524 | 146 | N/A | N/A | N/A |
| 15 | All Nippon Airways CO., LTD | Unitedkingdom | Shepherd'S Bush | 4th Floor | London | W6 7AP | N/A | 2013 | $12,803,551,208 | 1 | N/A | N/A | N/A |
| 16 | Easyjet Airline Company LIMITED | Unitedkingdom | Luton | 89 Hangar 89 | Luton | LU2 9PF | easyjet.***** | 2000 | $12,494,268,130 | 15,267 | N/A | N/A | N/A |
| 17 | Japan Airlines CO. LTD | Unitedkingdom | Moorgate | Standon House | London | E1 8AA | jal.***** | 1952 | $12,366,501,070 | 288 | N/A | N/A | N/A |
| 18 | Jet2.com LIMITED | Unitedkingdom | Collingham | Holiday House | Leeds, West Yorkshire | LS11 9AW | jet2.***** | 1986 | $7,945,269,416 | 13,476 | N/A | N/A | N/A |
| 19 | Eva Airways CORPORATION | Unitedkingdom | Saint Johns Wood | Evergreen House | London | NW1 2DT | evaair.***** | 1993 | $6,803,762,927 | 18,267 | N/A | N/A | N/A |
| 20 | Thai Airways International Public Company LIMITED | Unitedkingdom | Hounslow | Room Lo:0144 | London | TW6 1EW | thaiairways.***** | 1975 | $5,426,087,033 | 796 | N/A | N/A | N/A |
| 21 | China Airlines LIMITED | Unitedkingdom | Clapton | Minstrel House | London | EC2A 3DQ | china-airlines.***** | 1985 | $5,109,108,518 | 386 | N/A | N/A | N/A |
| 22 | Heathrow Airport LIMITED | Unitedkingdom | Eastcote and East Ruislip | The Compass Centre | London | TW6 2GW | heathrow.***** | 1930 | $4,414,068,724 | 7,968 | N/A | N/A | N/A |
| 23 | Virgin Atlantic Airways LIMITED | Unitedkingdom | Crawley | Virgin Atlantic Airways | West Sussex | RH10 9DF | virgin.***** | 1984 | $4,184,998,587 | 7,629 | N/A | N/A | N/A |
| 24 | Vietnam Airlines Joint Stock Company | Unitedkingdom | London | 7 Lower Grosvenor Place | London | SW1W 0EN | vietnamairlines.***** | 2006 | $3,753,134,473 | 9 | N/A | N/A | N/A |
| 25 | Finnair OYJ | Unitedkingdom | City of London | Angel Building, | London | EC1V 1NY | finnair.***** | 1972 | $3,248,412,833 | 5,223 | N/A | N/A | N/A |
| 26 | Air Europa Lineas Aereas, Sociedad Anonima | Unitedkingdom | Parsons Green | Suite 8, Fulham Business Exchange | London | SW6 2TL | aireuropa.***** | 2006 | $3,137,044,607 | 3,996 | N/A | N/A | N/A |
| 27 | PJSC Aeroflot | Unitedkingdom | Hounslow | Room 6112 North East Pod | London | TW6 3FB | aeroflot.***** | 1956 | $3,012,696,578 | 11 | N/A | N/A | N/A |
| 28 | Cargolux Airlines International S A | Unitedkingdom | Hatton | 602 Central Way | London | TW14 0RX | cargolux.***** | 1979 | $2,974,582,000 | 2,485 | N/A | N/A | N/A |
| 29 | Ethiopian Airlines Group | Unitedkingdom | Brentford | Unit 2 Burgoyne House | London | TW8 0GB | ethiopianairlines.***** | 1972 | $2,578,258,046 | 11 | N/A | N/A | N/A |
| 30 | El Al Israel Airlines LIMITED | Unitedkingdom | Saint Johns Wood | Blackburn House | London | NW6 1RZ | elal.***** | 1997 | $2,530,100,000 | 6,178 | N/A | N/A | N/A |
| 31 | Malaysian Airline System Berhad | Unitedkingdom | South Kensington | 247-249 Cromwell Road | London | SW5 9GA | malaysiaairlineseurope.***** | 1973 | $1,966,593,815 | 70 | N/A | N/A | N/A |
| 32 | British Airways Holidays LIMITED | Unitedkingdom | Crawley | Crawley Borough Council | West Sussex | RH10 1UZ | britishairways.***** | 1955 | $1,954,072,222 | 696 | N/A | N/A | N/A |
| 33 | Egyptair Airlines Company | Unitedkingdom | West Kensington | Kensington Centre | London | W14 8UD | egyptair.***** | 1961 | $1,849,278,053 | 606 | N/A | N/A | N/A |
| 34 | Kenya Airways PLC | Unitedkingdom | Eastcote and East Ruislip | World Business Centre | London | TW6 2RT | kenya-airways.***** | 1977 | $1,454,238,925 | 5,242 | N/A | N/A | N/A |
| 35 | Kuwait Airways Company | Unitedkingdom | West Drayton | 1 Heathrow Boulevard | London | UB7 0DQ | kuwaitairways.***** | 1965 | $1,420,146,040 | 41,252 | N/A | N/A | N/A |
| 36 | Nats Holdings LIMITED | Unitedkingdom | Anthill Common | 4000 Parkway | Hampshire | PO15 7FL | nats.***** | 2001 | $1,355,557,926 | 4,715 | N/A | N/A | N/A |
| 37 | Azerbaijan Airlines Closed Joint Stock Company | Unitedkingdom | Rotherhithe | 8 Baden Pl | London | SE1 1YW | N/A | 2009 | $1,162,626,834 | 7 | N/A | N/A | N/A |
| 38 | Easyjet UK LIMITED | Unitedkingdom | Luton | Hangar 89 | Luton | LU2 9PF | easyjet.***** | 2017 | $1,137,415,077 | 932 | N/A | N/A | N/A |
| 39 | Nats (en Route) Public LIMITED Company | Unitedkingdom | Anthill Common | 4000 Parkway | Hampshire | PO15 7FL | nats.***** | 2000 | $1,133,047,065 | 3,483 | N/A | N/A | N/A |
| 40 | Air Algerie | Unitedkingdom | Marylebone | 10 Baker Street | London | W1U 3BT | N/A | 1970 | $1,124,379,773 | 8 | N/A | N/A | N/A |
| 41 | Boeing Commercial Aviation Services Europe LIMITED | Unitedkingdom | London | 25 Victoria Street | London | SW1H 0EX | boeing.***** | 2012 | $1,110,550,000 | 395 | N/A | N/A | N/A |
| 42 | Sri Lankan Airlines LIMITED | Unitedkingdom | Eastcote and East Ruislip | 1 Stanstead Road | London | TW6 3XY | N/A | 1979 | $1,093,824,705 | 5,935 | N/A | N/A | N/A |
| 43 | Aer Lingus LIMITED | Unitedkingdom | Hounslow | Passenger Reservations | London | TW3 3JB | aerlingus.***** | 1967 | $1,024,028,304 | 3,906 | N/A | N/A | N/A |
| 44 | Overseas Air Travel LIMITED | Unitedkingdom | West Drayton | Po Box 365 | London | UB7 0GB | N/A | 1995 | $949,427,899 | 5 | N/A | N/A | N/A |
| 45 | Middle East Airlines Airliban S.A.L. | Unitedkingdom | Marylebone | 72-73 Margaret Street | London | W1W 8ST | mea.***** | 1958 | $766,328,000 | 1,770 | N/A | N/A | N/A |
| 46 | Ge Caledonian LIMITED | Unitedkingdom | Prestwick | Shawfarm Industrial Estate | South Ayrshire | KA9 2RX | prestwickaerospace.***** | 1978 | $750,720,000 | 897 | N/A | N/A | N/A |
| 47 | Asl Airlines Belgium (UK Branch) | Unitedkingdom | Hardingstone | South Portway Close | Northamptonshire | NN3 8RB | N/A | 2000 | $744,096,259 | 439 | N/A | N/A | N/A |
| 48 | Dnata Catering UK LIMITED | Unitedkingdom | Manchester | Building 319 | Manchester, Greater Manchester | M90 5EX | alphalsg.***** | 2012 | $707,385,973 | 3,925 | N/A | N/A | N/A |
| 49 | Manchester Airport PLC | Unitedkingdom | Manchester | Olympic House | Manchester, Greater Manchester | M90 1QX | manchesterairport.***** | 2001 | $645,590,420 | 2,728 | N/A | N/A | N/A |
| 50 | Air Mauritius LIMITED | Unitedkingdom | Brentford | Profile West | London | TW8 9ES | airmauritius.***** | 1967 | $638,226,806 | 5,000 | N/A | N/A | N/A |
| 51 | A J Walter Aviation LIMITED | Unitedkingdom | Slinfold | Aj Walter Aviation Headquarter | West Sussex | RH13 0AS | ajw-aviation.***** | 1961 | $619,237,000 | 514 | N/A | N/A | N/A |
| 52 | Biman Bangladesh Airlines LIMITED | Unitedkingdom | Marylebone | 17 Conduit Street | London | W1S 2BJ | biman-airlines.***** | 1973 | $590,145,753 | 15 | N/A | N/A | N/A |
| 53 | Cargolux Airlines International SA | Unitedkingdom | Hatton | 602 Central Way North Feltham Trading Est | London | TW14 0RX | N/A | N/A | $556,828,754 | 1,087 | N/A | N/A | N/A |
| 54 | Ba Euroflyer LIMITED | Unitedkingdom | West Drayton | Waterside | London | UB7 0GB | N/A | 2021 | $543,532,602 | 759 | N/A | N/A | N/A |
| 55 | Wizz Air UK LIMITED | Unitedkingdom | Sundon Park | Percival House | Luton | LU2 9NU | N/A | 2017 | $534,663,773 | 827 | N/A | N/A | N/A |
| 56 | Swissport UK Holding LIMITED | Unitedkingdom | Runcorn | Swissport House Hampton Court | Halton | WA7 1TT | swissport.***** | 2010 | $516,809,865 | 7,458 | N/A | N/A | N/A |
| 57 | Chapman Freeborn Holdings LIMITED | Unitedkingdom | Horley | 3 City Place | Surrey | RH6 0PA | chapmanfreeborn.***** | 2009 | $479,903,650 | 419 | N/A | N/A | N/A |
| 58 | Bristow Helicopters LIMITED | Unitedkingdom | Redhill | Redhill Aerodrome | Surrey | RH1 5JZ | bristowgroup.***** | 1955 | $443,437,479 | 1,005 | N/A | N/A | N/A |
| 59 | Swissport Gb LIMITED | Unitedkingdom | Runcorn | Swissport House | Halton | WA7 1TT | swissport.***** | 1952 | $441,978,597 | 7,109 | N/A | N/A | N/A |
| 60 | Bae Systems (overseas Holdings) LIMITED | Unitedkingdom | Frimley | Victory Point | Surrey | GU16 7EX | baesystems.***** | 1993 | $427,700,795 | 12 | N/A | N/A | N/A |
| 61 | Do & CO. Event & Airline Catering LIMITED | Unitedkingdom | Hatton | 200 Great South West Road | London | TW4 6FD | doco.***** | 2003 | $397,719,126 | 1,767 | N/A | N/A | N/A |
| 62 | London Luton Airport Operations LIMITED | Unitedkingdom | Sundon Park | Percival House | Luton | LU2 9NU | london-luton.***** | 1998 | $369,672,678 | 769 | N/A | N/A | N/A |
| 63 | Avtrade Holdings LIMITED | Unitedkingdom | Hassocks | Avtrade Global Headquarters | West Sussex | BN6 9JQ | avtrade.***** | 2001 | $368,279,309 | 291 | N/A | N/A | N/A |
| 64 | Ryanair UK LIMITED | Unitedkingdom | Bardfield End Green | Enterprise House | Essex | CM24 1QW | N/A | 1985 | $354,425,684 | 491 | N/A | N/A | N/A |
| 65 | Edinburgh Airport LIMITED | Unitedkingdom | Edinburgh | Edinburgh Airport | City of Edinburgh | EH12 9DN | yosushi.***** | 1976 | $349,995,209 | 873 | N/A | N/A | N/A |
| 66 | Ba Cityflyer LIMITED | Unitedkingdom | Didsbury | 1st Floor Pioneer House Towers Business Park | Manchester, Greater Manchester | M20 2BA | ba.***** | 1991 | $349,459,362 | 648 | N/A | N/A | N/A |
| 67 | Air One Aviation LIMITED | Unitedkingdom | Hampton | 1 Becketts Place | London | KT1 4EQ | chartersphere.***** | 2009 | $345,620,779 | 25 | N/A | N/A | N/A |
| 68 | Loganair LIMITED | Unitedkingdom | Howwood | Lightyear Building | Renfrewshire | PA3 2SJ | loganair.***** | 1962 | $335,233,132 | 899 | N/A | N/A | N/A |
| 69 | A.N.A. Airline Management LTD | Unitedkingdom | Crawley | Eagle House | West Sussex | RH10 1DD | network-airline.***** | 2010 | $314,835,371 | 21 | N/A | N/A | N/A |
| 70 | Aar International, INC. | Unitedkingdom | Hounslow | 1 World Business Centre, 1206 Newall Road | London | TW6 2BP | aarcorp.***** | 1978 | $302,783,000 | 8 | N/A | N/A | N/A |
| 71 | Nats (services) LIMITED | Unitedkingdom | Anthill Common | 4000 Parkway Technical Centre | Hampshire | PO15 7FL | nats.***** | 1996 | $268,556,316 | 893 | N/A | N/A | N/A |
| 72 | Iran Air - The Airline Of The Islamic Republic Of Iran | Unitedkingdom | Shepherd'S Bush | 177-179 Hammersmith Road | London | W6 8BS | heathrow.***** | 1971 | $267,587,781 | 30 | N/A | N/A | N/A |
| 73 | Amedeo Air Four Plus LIMITED | Unitedkingdom | Saint Peter Port | Ground Floor Dorey Court | Guernsey | GY1 2HT | N/A | 2015 | $258,661,874 | 6 | N/A | N/A | N/A |
| 74 | Raf Lyneham - Main Number | Unitedkingdom | Chippenham | Lyneham | Wiltshire | SN15 4PZ | N/A | 2012 | $244,399,601 | 3,000 | N/A | N/A | N/A |
| 75 | Cyprus Airways Public LTD | Unitedkingdom | Hounslow | Room 253 Terminal One | London | TW6 1AS | N/A | 1971 | $243,231,629 | 2 | N/A | N/A | N/A |
| 76 | Civil Aviation Authority | Unitedkingdom | Gatwick | Aviation House | Gloucestershire | RH6 0YR | caa.***** | 1972 | $235,786,864 | 1,490 | N/A | N/A | N/A |
| 77 | Gama Aviation PLC | Unitedkingdom | Farnborough | 25 Templer Avenue | Hampshire | GU14 6FE | gamaaviation.***** | 2010 | $231,872,000 | 817 | N/A | N/A | N/A |
| 78 | Dnata LIMITED | Unitedkingdom | Colnbrook | Dakota House | Slough | SL3 0QX | N/A | 1995 | $230,092,363 | 2,334 | N/A | N/A | N/A |
| 79 | Bristol Airport LIMITED | Unitedkingdom | Bristol | Motor Transport Section | City of Bristol | BS48 3DY | bristolairport.***** | 1930 | $222,499,865 | 332 | N/A | N/A | N/A |
| 80 | Signature Aviation LIMITED | Unitedkingdom | Sundon Park | Terminal 1, Percival Way | Luton | LU2 9PA | N/A | 1897 | $218,979,676 | 35 | N/A | N/A | N/A |
| 81 | Royal Brunei Airlines Sdn BHD | Unitedkingdom | Horley | Suite 9a | Surrey | RH6 9ST | flyroyalbrunei.***** | 1978 | $217,284,230 | 218 | N/A | N/A | N/A |
| 82 | Baa Southampton Airport - Main Number | Unitedkingdom | Eastleigh | Southampton Airport Pre Security, Mitchell Way | Hampshire | SO18 2NL | southamptonairport.***** | 1989 | $216,303,979 | 2,500 | N/A | N/A | N/A |
| 83 | Menzies Aviation (UK) LIMITED | Unitedkingdom | Saint Giles | 21-22 Bloomsbury Square | London | WC1A 2NS | N/A | 1833 | $213,140,385 | 3,496 | N/A | N/A | N/A |
| 84 | Titan Airways LIMITED | Unitedkingdom | Bardfield End Green | Endeavour House | Essex | CM24 1SJ | titan-airways.***** | 1988 | $202,178,419 | 108 | N/A | N/A | N/A |
| 85 | Norse Atlantic UK LTD | Unitedkingdom | Crawley | Astral Towers | West Sussex | RH10 9XA | N/A | 2021 | $200,910,000 | 402 | N/A | N/A | N/A |
| 86 | Abm Aviation UK LIMITED | Unitedkingdom | Eastcote and East Ruislip | World Business Centre 2 | London | TW6 2SF | blackjackpromotions.***** | 2003 | $180,433,859 | 3,896 | N/A | N/A | N/A |
| 87 | Bristow Technical Services LIMITED | Unitedkingdom | Redhill | Redhill Aerodrome | Surrey | RH1 5JZ | bristowgroup.***** | 1953 | $159,342,652 | 300 | N/A | N/A | N/A |
| 88 | Glasgow Airport LIMITED | Unitedkingdom | Howwood | St. Andrews Drive | Renfrewshire | PA3 2TJ | interrent.***** | 1986 | $157,199,136 | 138 | N/A | N/A | N/A |
| 89 | Esken LIMITED | Unitedkingdom | Saint Peter Port | Po Box 286, Floor 2 | Guernsey | GY1 4LY | N/A | 2002 | $147,855,848 | 756 | N/A | N/A | N/A |
| 90 | Mag Airport LIMITED | Unitedkingdom | Manchester | 6th Floor | Manchester, Greater Manchester | M90 1QX | alitravels.***** | 2019 | $147,172,457 | 423 | N/A | N/A | N/A |
| 91 | Offshore Helicopter Services UK LIMITED | Unitedkingdom | Moorgate | C/o Brodies Llp | London | EC1A 7BN | bondoffshorehelicopters.***** | 2001 | $144,844,908 | 336 | N/A | N/A | N/A |
| 92 | European Cargo LIMITED | Unitedkingdom | Parley | Aviation Park | Bournemouth | BH23 6BS | N/A | 1989 | $136,275,000 | 277 | N/A | N/A | N/A |
| 93 | Farnborough Airport LIMITED | Unitedkingdom | Farnborough | Farnborough Airport | Hampshire | GU14 6XA | tagfarnborough.***** | 1997 | $132,003,190 | 186 | N/A | N/A | N/A |
| 94 | Menzies Aviation Holdings LIMITED | Unitedkingdom | Saint Giles | 21-22 Bloomsbury Square | London | WC1A 2NS | N/A | 2000 | $131,623,536 | 179 | N/A | N/A | N/A |
| 95 | Iag Cargo LIMITED | Unitedkingdom | Eastcote and East Ruislip | Carrus Cargo Centre | London | TW6 2JS | iagcargo.***** | 2012 | $128,712,824 | 588 | N/A | N/A | N/A |
| 96 | Aer Lingus (U.K.) LIMITED | Unitedkingdom | Sydenham Intake | Aer Lingus | Belfast | BT3 9JH | N/A | 2012 | $121,305,964 | 200 | N/A | N/A | N/A |
| 97 | East Midlands International Airport LIMITED | Unitedkingdom | Derby | Pathfinder House | Derby | DE74 2SA | eastmidlandsairport.***** | 1986 | $121,193,755 | 683 | N/A | N/A | N/A |
| 98 | Chc Scotia LIMITED | Unitedkingdom | Moorgate | C/o Cms Cameron Mckenna Nabarro Olswang Llp | London | EC4N 6AF | chcheli.***** | 1968 | $116,784,898 | 272 | N/A | N/A | N/A |
| 99 | Netjets UK LIMITED | Unitedkingdom | Ladbroke Grove | 5 Young Street | London | W8 5EH | netjets.***** | 2003 | $110,302,280 | 1 | N/A | N/A | N/A |
| 100 | Aerotron Group (holdings) LIMITED | Unitedkingdom | Crawley | Westley House | West Sussex | RH10 9GA | aerotron.***** | 2005 | $107,414,520 | 207 | N/A | N/A | N/A |