National Airlines was used by several airlines including:
- National Airlines (N8) (IATA: N8, ICAO: NCR, call sign: National Cargo) (2008-) based in the United States.
- National Airlines (1999-2002) (IATA: N7, ICAO: ROK, call sign: Red Rock) (1999-2002) based in the United States.
- National Airlines (1934–1980) (IATA: NA, ICAO: NAL, call sign: National) (1934-1980) based in the United States.
- National Airlines (YJ) (IATA: YJ, ICAO: NTN) based in South Africa.
- National Airlines (1931) (1931-1940) based in the United States acquired by Delta Air Lines.
- National Airlines (1983) (1983-1986) based in the United States.
- National Airlines (Chile) (1992-1998) based in Chile.