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- L.A.B. Flying Service (1956 - 2008)
- L'Express Airlines (1989 - 1992)
- Lake Central Airlines (1949 - 1968, to Allegheny Airlines)
- Lakeland Airlines (1980 - 1984)
- Las Vegas Airlines (1973 - 1987)
- Legend Airlines (1996 - 2000)
- Leisure Air (1992 - 1995)
- Liberty Express Airlines ((1994 - 1997, to Air Midwest)
- Lone Star Airlines (1960) & (1984 - 1998)
- Lynx Air International (1989 - 2009)
Read more about this topic: List Of Defunct Airlines Of The United States