- Lucas AirportIdent: 38KServes: Lucas
- Lucas FieldIdent: 79KYServes: Nicholasville
- Lucchetti Ranch AirportIdent: 8CL2Serves: Elk Grove
- Luce County AirportIdent: KERYServes: Newberry
- Lucin AirportIdent: 02UTServes: Lucin
- Luckinbill AirstripIdent: WY06Serves: Cody
- Lucky Dog AirportIdent: US-12718Serves: Dodge City
- Lucky G AirportIdent: 4TA5Serves: Holliday
- Lucky L Ranch AirportIdent: CD99Serves: Steamboat Springs
- Lucky Lairds Landing AirportIdent: 81GAServes: Villa Rica
- Lucky Star Ranch AirportIdent: TX04Serves: Brenham
- Ludlow AirportIdent: 5CA4Serves: Barstow
- Lufker AirportIdent: 49NServes: East Moriches
- Luginbuel Hee Haw AirportIdent: 68ARServes: Luginbuel Hee Haw Airport
- Luke AirportIdent: 3NY5Serves: Binghamton
- Lumar FieldIdent: FA29Serves: Perry
- Lumberton AirportIdent: OH77Serves: Wilmington
- Lumpkin County Wimpys AirportIdent: K9A0Serves: Dahlonega
- Luna Landing AirportIdent: NM26Serves: Deming
- Lunacity Ranch AirfieldIdent: 02TTServes: Cumby
- Lund AirportIdent: 93IAServes: Jewell
- Lundgren Hereford Ranch AirportIdent: 9KS6Serves: Gove
- Lunenburg County AirportIdent: KW31Serves: Kenbridge
- Luray Caverns AirportIdent: KW45Serves: Luray
- Lusardi FieldIdent: 4OR7Serves: Salem
- Luscombe Acres AirportIdent: 6XS2Serves: Alvarado
- Lusk Municipal AirportIdent: KLSKServes: Lusk
- Lutgen AirportIdent: 20SDServes: White
- Luther AirportIdent: 1D5Serves: Chittenango
- Lutz AirportIdent: 9OH7Serves: Findlay
- Luv FieldIdent: 47XAServes: Taylor
- Lux FieldIdent: 25CDServes: Hartsel
- Lux StripIdent: MN28Serves: Cosmos
- Lyall-Roberts AirportIdent: 37CLServes: Pauma Valley
- Lykens Valley Flying Association AirportIdent: US-7296Serves: Elizabethville
- Lykes Brighton AirportIdent: 8FD5Serves: Okeechobee
- Lynch FieldIdent: 44MUServes: Granby
- Lynch's Landing AirportIdent: MD61Serves: Nottingham
- Lynden AirportIdent: 38WServes: Lynden
- Lynn AirportIdent: 18WVServes: Independence
- Lynn FieldIdent: US-8022Serves: Bedford
- Lyon AirportIdent: LS14Serves: Thornwell
- Lyons FieldIdent: OI52Serves: Jamestown
- Lyons Landing AirportIdent: 5GA2Serves: Whitesburg
- Lyons-Rice County Municipal AirportIdent: KLYOServes: Lyons
- Lz Carroll STOLportIdent: 4NC9Serves: Gold Hill
- LZ Fairwinds AirportIdent: LL78Serves: Rockford
- LZ Juliet Bravo AirportIdent: 5XA1Serves: Valley Mills
- Lz Ranch AirportIdent: 14WAServes: Olympia
- LZ Tango Charlie AirportIdent: 08TTServes: Fredericksburg
- M & F Landing AirportIdent: WI52Serves: Greenleaf
- M & M Land Company AirportIdent: TE15Serves: Menard
- M K FieldIdent: 6GE4Serves: Hogansville
- M Sansom Ranch AirportIdent: US-0762Serves: Paint Rock
- M Y Ranch AirportIdent: 80TSServes: Crockett
- M-4 AirportIdent: US-1134Serves: Willis
- M. Bodvig AirstripIdent: NA71Serves: Tappen
- M. Graham Clark Downtown AirportIdent: KPLKServes: Branson / Hollister
- M.A.M Trail AirportIdent: IL65Serves: Little York
- M.C.R. AirportIdent: 40OIServes: Lodi