Flight 604 may refer to:
Allegheny Airlines Flight 604, crashed 1965 in Pennsylvania after takeoff (engine failure, failures by flight crew) Ethiopian Airlines Flight 604, crashed 1988 at Bahar Dar airport (bird strike, double engine failure) Flash Airlines Flight 604, crashed 2004 in the Red Sea after takeoff Sonicblue Airways Flight 604, crashed 2006 near Vancouver (turbine blade fatigue failure)