Airlines — L
- LPRL
- LAHL A Helicopter
- LJYL J Aviation
- LRBL R Airlines
- FNTL-3 Communications Flight Internation Aviation
- LABL.A.B. Flying Service
- LEXL'Express
- PHOL&L Flygbildteknik
- ASKLa Ronge Aviation Services
- LVTLa Valenciana Taxi Aereo
- SKQLabcorp
- LALLabrador Airways
- LRCLACSA
- LDELADE - Lineas Aereas Del Estado
- JEVLagun Air
- BNXLAI - Linea Aerea IAACA
- HCALake Havasu Air Service
- LKLLakeland Aviation
- LKRLaker Airways
- LBHLaker Airways (Bahamas)
- LMRLamra
- LANLAN Airlines
- DSMLAN Argentina
- LCOLAN Cargo
- LNCLAN Dominica
- LXPLAN Express
- LPELAN Peru
- TCRLanaes Aereas Trans Costa Rica
- ISLLandsflug
- PAPLangtry Flying Group
- LKNLankair
- LSALANSA
- LZALanza Air
- LZTLanzarote Aerocargo
- LLLLao Air Company
- LAOLao Airlines
- LKALao Capricorn Air
- LPNLaoag International Airlines
- APTLAP Colombia - Lineas Aereas Petroleras
- LRDLaredo Air
- OTNLASTP
- LTCLatCharter
- LAFLatvian Air Force
- LDALauda Air
- LDILauda Air Italy
- LEPLaughlin Express
- LSULaus
- LARLawrence Aviation
- LAYLayang-Layang Aerospace
- LCBLC Busre
- LMMLCM AIRLINES
- LPLLease-a-Plane International
- LAQLebanese Air Transport
- LATLebanese Air Transport (Charter)
- LADLebanon Airport Development Corporation
- LCALeconte Airlines
- LEELeeming Flying Training Unit
- LIALeeward Islands Air Transport
- LGDLegend Airlines
- LWDLeisure Air
- LENLentini Aviation
- LORLeo-Air
- LELLeonsa De Aviacion
- LTYLiberty Airways
- LYWLibyan Airlines
- LCRLibyan Arab Air Cargo
- LAALibyan Arab Airlines
- LIQLid Air
- LCGLignes Aeriennes Congolaises
- LKDLignes Aeriennes Du Tchad
- LMELignes Mauritaniennes Air Express
- GCBLignes Nationales Aeriennes - Linacongo
- GDQLincoln Air National Guard
- LRTLincoln Airlines
- LSYLindsay Aviation
- LBLLine Blue
- NOTLinea Aerea Costa Norte
- NEGLinea Aerea de Fumig Aguas Negras
- LERLinea Aerea de Servicio Ejecutivo Regional
- LMCLinea Aerea Mexicana de Carga
- LNPLinea Aerea SAPSA
- LSELinea De Aeroservicios
- TUYLinea Turistica Aerotuy
- ALRLineas Aereas Alaire S.L.
- LCDLineas Aereas Azteca
- LCNLineas Aereas Canedo LAC
- LCMLineas Aereas Comerciales
- UMALineas Aereas del Humaya
- EDDLineas Aereas Ejectuivas De Durango
- EDRLineas Aereas Eldorado
- FEDLineas Aereas Federales
- LMNLineas Aereas Monarca
- LIJLineas Aereas San Jose
- LECLinex
- LAMLinhas A
- SMSLinhas Aereas Santomenses
- LAWLink Airways of Australia
- LOPLinton-on-Ouse Flying Training Unit
- LIOLÍO Flugmennt
- WGTLion Air Services