Flight 611 may refer to:
- United Air Lines Flight 611, first incident involving the Boeing 737, 19 July 1970
- Southwest Air Lines Flight 611, landing accident on 26 August 1982
- China Airlines Flight 611, crashed on 25 May 2002
- DHL Flight 611, collided with Bashkirian Charter Flight 2937 in the Überlingen mid-air collision on 1 July 2002
- Air India Express Flight 611, tail strike and antenna collision on takeoff due to captain seat failure on 11 October 2018