Flight 51
Flight 51 may refer to:
- Aeroflot Flight 51, crashed on 30 December 1967
 - United Nations Flight 51, crashed on 9 August 1974
 - ACE Air Cargo Flight 51, crashed on 8 March 2013
 - Siberian Light Aviation Flight 51, crashed on 12 September 2021
 
Flight 51 may refer to: