Airlines — I
- RSYI-Fly
- CSQIBC Airways
- IBEIberia Airlines
- IBSIberia Express
- IBRIbertour Servicios Aereos
- IBTIbertrans Aerea
- IWDIberworld
- IBXIbex Airlines
- IBCIbicenca Air
- AKIIbk-Petra
- IBLIBL Aviation
- BBLIBM Euroflight Operations
- YYYICAO
- RACIcar Air
- FRCIcare Franche Compte
- ICDIcaro
- IUSIcarus
- CICICC Canada
- ICBIcebird Airline
- ICJIcejet
- ICEIcelandair
- ICGIcelandic Coast Guard
- IDGIDG Technology Air
- IFLIFL Group
- RDEII Lione Alato Arl
- IJMIJM International Jet Management
- IKRIkaros DK
- IKKIKI International Airlines
- IKNIKON FTO
- CIOIl Ciocco International Travel Service
- ILVIl-Avia
- IDLIldefonso Redriguez
- IARIliamna Air Taxi
- ILWIllinois Airways
- ILPIlpo Aruba Cargo
- ILLIlyich-Avia
- IMRImaer
- ITXImair Airlines
- BLUIMP Aviation Services
- XGGIMP Group Aviation Services
- PNXImperial Airways
- IMTImtrec Aviation
- IIRINAVIA Internacional
- IDEIndependence Air
- IDPIndependent Air Freighters
- IILIndia International Airways
- IFCIndian Air Force
- IACIndian Airlines
- IDRIndicator Company
- IBUIndigo
- IGOIndiGo Airlines
- AXCIndochina Airlines
- IDXIndonesa Air Aisa X
- IDAIndonesia Air Transport
- AWQIndonesia AirAsia
- IDSIndonesia Sky
- IAAIndonesian Airlines
- IPNIndustri Pesawat Terbang Nusantara
- ITNIndustrias Titan
- IG1Indya Airline Group
- FFIInfinit Air
- INSInflite The Jet Centre
- IVAInnotech Aviation
- INCInsel Air International
- ICCInstituto Cartografico de Cataluna
- INTIntair
- INLIntal Avia
- FFLIntavia Limited
- IJTInteliJet Airways
- XRAIntensive Air
- IEAInter European Airways
- INXInter Express
- IINInter Islands Airlines
- CARInter RCA
- NTTInter Tropic Airlines
- ITAInter-Air
- ICNInter-Canadian
- UGLInter-Island Air
- IMAInter-Mountain Airways
- ITSInter-State Aviation
- ILNInterair South Africa
- NTEInteraire
- SUWInteravia Airlines
- IVTInteraviatrans
- ICTIntercontinental de Aviaci
- ICPIntercopters
- IFTInterflight
- IJTInterflight (Learjet)
- RFLInterfly
- IFFInterfreight Forwarding
- IGNInterguide Air
- ISNInterisland Airlines
- IWYInterisland Airways Limited
- MTFInterjet
- IHEInterjet Helicopters
- ITKInterlink Airlines
- IAKInternational Air Cargo Corporation
- ITCInternational Air Carrier Association
- EXXInternational Air Corporation
- IASInternational Air Service