 | Interglobe Aviation Ltd. dba Indigo | 2006 | 107 |
 | IBERIA | 1927 | 78 |
 | Interjet | 2005 | 63 |
 | Iran Air | 1962 | 46 |
 | Iraqi Airways | 1945 | 31 |
 | Icelandair | 1937 | 30 |
 | Iran Aseman Airlines | 1980 | 30 |
 | Indian Air Force | - | 21 |
 | IBC Airways, Inc. | 1991 | 13 |
 | Island Aviation Services Ltd. | 2008 | 10 |
 | Iranian Naft Airlines | 1992 | 9 |
 | IBEX Airlines Co., Ltd. | 1999 | 9 |
 | InselAir | 2006 | 9 |
 | InselAir Aruba N.V. dba InselAir Aruba | 2012 | 7 |
| Indonesia Air Transport | 1968 | 6 |
 | Israir | 1989 | 5 |
 | Iran Air Tours | 2002 | 4 |
 | IHY Izmir Havayollari A.S. | 2006 | 4 |
 | Inter-Aviation Services dba Interair South Africa | 1993 | 3 |
 | ISLAND TRANSVOYAGER INC. | 2015 | 3 |
 | Islena de Inversiones S.A. de C.V. dba Islena Airlines | 1981 | 2 |
 | iFly Airlines | - | - |
 | Indonesia AirAsia X | 2014 | 2 |
 | IRS Airlines | - | 1 |
 | Icaro Express | 1971 | 1 |
| Imperial Aerotransporte | - | - |
| Ilerdair | - | - |
| Image Air Charter | - | - |
| INAER Euskadi | - | - |
| Island Helicopters | - | - |
| Interjet Helicopters | - | - |
| Inversiones Y Promociones Ducoy | - | - |
| Island Airlines | - | - |
| Isle Grande Flying School | - | - |
| Inter Build | - | - |
| Island Development Company | - | - |
| ICAO | - | - |
| Israeli Air Force | - | - |
| ICC Canada Ltd | - | - |
| Ibex Air Charter | - | - |
 | interCaribbean Airways, Ltd. | - | - |
| International Air Serivces | - | - |
| ICAR | - | - |
| Infinit Air | - | - |
| Inter Air | - | - |
| IMD Airways | - | - |
| IBL Aviation | - | - |
| ILPO Aruba Cargo | - | - |
| Ilas | - | - |
| International Flight Training Academy | - | - |
| Inter-Island Air | - | - |
| Intervuelos | - | - |
 | IBS Software Services Americas, Inc. | - | - |
| Inversia Air | - | - |
| Ixair | - | - |
 | Intercontinental Airways (Gambia) | - | - |
| Istithmar World Aviation | - | - |
| International SOS Windhoek | - | - |
| International Federation of Red Cross And Red Crescent Societies (IFRC) | - | - |
| IKI International Airlines | - | - |
| Icelandic Coast Guard | - | - |
| iFly | - | - |
| Illinois Department of Transportation | - | - |
| International Notam Office | - | - |
 | IBA International Business Airlines | - | - |
| Interisland Airlines | - | - |
| Inter (Colombia) | - | - |
| Inter Aviation | - | - |
| Iliamna Air Taxi | - | - |
| Ivoire Aero Services | - | - |
| I.D.G. Technology Air | - | - |
| International Flight Resources | - | - |
| Irving Oil Transport | - | - |
| Italfly | - | - |
| Innotech Aviation | - | - |
| International Jet Services | - | - |
| International Business Aircraft | - | - |
| Irish Aviation Authority, Flight Check Department | - | - |
 | Ivoirienne de Transport Aerien | - | - |
 | InterSky Luftfahrt GmbH | - | - |
| Imperial Jet | - | - |
| Iowa Airways | - | - |
 | Itek Air | - | - |
 | INAER Helicopter France | - | - |
| Intercity Air | - | - |
| IVV Femida | - | - |
| Island Aviation And Travel | - | - |
| INAER Helicopteros Off-Shore | - | - |
| InvestAvia Airline | - | - |
| Icaro Servicios Aereos | - | - |
| Indicator Company | - | - |
| Ibex-U.L. | - | - |
| IBM | - | - |
 | Inter Iles Air | - | - |
| Iconair | - | - |
| IASCO Flight Training | - | - |
| Insignia Aviacion | - | - |
| InterJet Hellenic | - | - |
| Inter-Air | - | - |
| Ildefonso rodriguez | - | - |
| IMP Group Aviation Services | - | - |
| IAS Medical | - | - |
| Ion Tiriac | - | - |
| Interaire | - | - |
| International Security Assistance Force | - | - |
| Interaviation Charter | - | - |
| Irving Oil | - | - |
| Infinity Airlines | - | - |
| Irish Air Corps | - | - |
| Inter Island Airlines | - | - |
| Island Oil Exploration | - | - |
| Inter-Mountain Airways | - | - |
| Interjet | - | - |
| Interlace Airlines | - | - |
| Icec Tour | - | - |
| Ivoire Jet Express | - | - |
| Imagine Air Jet Services | - | - |
| Ibk-Petra | - | - |
| International Company for Transport, Trade and Public Works | - | - |
| IACA | - | - |
| Instituto Cartografico de Cataluna | - | - |
| Isles Of Scilly Skybus | - | - |
| Interport Corporation | - | - |
| Intergaz | - | - |
| Island Helicopters | - | - |
| Icejet | - | - |
| Interfreight Forwarding | - | - |
| Industrias Titan | - | - |
| IPEC Aviation. | - | - |
| Imtrec Aviation | - | - |
| India International Airways | - | - |
| Intervuelos Nacionales | - | - |
| IFL Group | - | - |
| International Jet Aviation Services | - | - |
| Interflight | - | - |
| International Air | - | - |
| Il Ciocco International Travel Service | - | - |
| Ibertour Servicios Aereos | - | - |
| IAMC | - | - |
 | Izhavia Public Stock Company | - | - |
| Island Wings | - | - |
| Ibertrans Aerea | - | - |
| Iraq Gate | - | - |
| Interguide Air | - | - |
| IL-Avia | - | - |
| IFA - Instituto de Formacao Aeronautica | - | - |
| Island Air Express | - | - |
| Inter Island Air Charter | - | - |
| Independent Air Freighters | - | - |
| Inter Tropic Airlines | - | - |
| Intercopters | - | - |
| Intersky | - | - |
| Inter RCA | - | - |
| ITAB - International Trans Air Business | - | - |
| INAER Helicopter Portugal | - | - |
| International Charter Xpress | - | - |
| International Air Service Co. | - | - |
| International Air Cargo Corporation (IACC) | - | - |
| Island Air Charters | - | - |
| International Trans-Air | - | - |
| Island Air | - | - |
| Ikaros DK | - | - |
| InterJet West | - | - |
| International Jet Management | - | - |
| Innu Mikun Airlines | - | - |
 | International Air Transport Association - IATA | - | - |
| Icare Franche Comte | - | - |
| Ilyich-Avia | 2002 | - |