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- Ransome Airlines (1967 - 1995)
- Rahm Rescue (?-1971)
- Red Baron Airlines (1979 - 1980)
- Red Carpet Airlines
- Red Dodge Aviation
- Reeve Aleutian Airways (1932 - 2001)
- Regent Air
- RegionsAir (1996 - 2007)
- Reno Air (1990 - 99, to American Airlines)
- Republic Airlines (1979 - 1986, to Northwest Airlines)
- Rich International Airways (1971 - 1996)
- Riddle Airlines (1945 - 1965, to Airlift International
- Rio Airways (1970 - 1987)
- Robertson Air Service (1927 - 1933)
- Rocky Mountain Airways (1964 - 1986)
- Russia Jet Direct (2005)
- Ryan International Airlines (ceased operations January 11, 2013)
Read more about this topic: List Of Defunct Airlines Of The United States