Aeroflot Flight 101/X-20 (Russian: Рейс 101/X-20 Аэрофлота Reys 101/X-20 Aeroflota) was a scheduled domestic passenger flight from Moscow to Alma-Ata via Omsk, Soviet Union, that crashed in low visibility conditions on 4 January 1965, killing 64 of the 103 people on board.