- Longs AirportIdent: VA32Serves: Edinburg
- Longs Airport North AirportIdent: OK21Serves: Pryor
- Longview Ranch AirportIdent: OG39Serves: Kimberly
- Longville Municipal AirportIdent: KXVGServes: Longville
- Lonnie Pool Field Weaverville AirportIdent: KO54Serves: Weaverville
- Lookingglass AirportIdent: 48ORServes: Roseburg
- Lookout AirportIdent: OL99Serves: Homer
- Lookout Mountain AirportIdent: 0GE3Serves: Wildwood
- Lookout Point AirportIdent: 82LSServes: Transylvania
- Lopez Island AirportIdent: S31Serves: Lopez
- Lorain County Regional AirportIdent: KLPRServes: Lorain/Elyria
- Lordsburg Municipal AirportIdent: KLSBServes: Lordsburg
- Lorentzen AirportIdent: 3NA2Serves: Washburn
- Lorenz AirportIdent: MN11Serves: Benson
- Loring International AirportIdent: ME16Serves: Limestone
- Los Alamos AirportIdent: KLAMServes: Los Alamos
- Los Banos Municipal AirportIdent: KLSNServes: Los Banos
- Los Cuernos Ranch AirportIdent: XA08Serves: Cotulla
- Lost Bridge AirportIdent: OA16Serves: North Bend
- Lost Bridge Village AirportIdent: 40ARServes: Garfield
- Lost Creek AirportIdent: 5Y4Serves: Luzerne
- Lost Creek AirportIdent: 82ORServes: Dexter
- Lost Mine AirportIdent: MO56Serves: Theodosia
- Lost Mountain AirportIdent: WV06Serves: Romney
- Lost River 1 AirportIdent: LSRServes: Lost River
- Lothert's Farm StripIdent: 56MNServes: Morton
- Lotus International AirportIdent: 8VA4Serves: Buckinham
- Lou Abbett Farms AirportIdent: II18Serves: La Crosse
- Loucks AirportIdent: 25NKServes: Hammondsport
- Louisa County Airport / Freeman FieldIdent: KLKUServes: Louisa
- Louisiana Regional AirportIdent: KL38Serves: Gonzales
- Louisville Municipal AirportIdent: K2J3Serves: Louisville
- Louisville Winston County AirportIdent: KLMSServes: Louisville
- Loup City Municipal AirportIdent: K0F4Serves: Loup City
- Loury Lester AirparkIdent: 6VA2Serves: Martinsville
- Love FieldIdent: 97FLServes: Weirsdale
- Lovers Lane AirportIdent: US-3782Serves: Garden City
- Lovettsville AirfieldIdent: VA61Serves: Lovettsville
- Low Pass AirportIdent: 4OK4Serves: Tuttle
- Lowcountry Regional AirportIdent: KRBWServes: Walterboro
- Lowe AirportIdent: 5KY5Serves: Cadiz
- Lowe AirstripIdent: CD01Serves: Cotopaxi
- Lowell AirportIdent: C97Serves: Lowell
- Lowell City AirportIdent: 24CServes: Lowell
- Lowell FieldIdent: 00AKServes: Anchor Point
- Lowell FieldIdent: 9GA5Serves: Americus
- Lowell Smith Jr AirportIdent: 3TX6Serves: Rio Vista
- Lower Chattahoochee Regional AirportIdent: K25JServes: Cuthbert
- Lower Creek AirportIdent: NC27Serves: Lenoir
- Lower Granite State AirportIdent: 00WServes: Colfax
- Lower Loon Creek AirportIdent: ID67Serves: Challis
- Lower Monumental State AirportIdent: W09Serves: Kahlotus
- Lowmiller AirportIdent: WY70Serves: Lovell
- Lowrance Ranch AirportIdent: 26TXServes: Truscott
- Loxahatchee AirportIdent: 7FD6Serves: Lake Worth
- Loy AirportIdent: 1IL8Serves: Donovan
- Lt Landing AirportIdent: 23GEServes: Dublin
- Lt Warren Eaton AirportIdent: KOICServes: Norwich
- Lt World AirportIdent: 00GAServes: Lithonia
- Lubec Municipal AirportIdent: 65BServes: Lubec