Aero Flight 311 (
AY311), often referred to as the
Kvevlax air disaster, was a scheduled domestic passenger flight operated by Aero O/Y (now
Finnair) between
Kronoby,
Finland and
Vaasa. The aircraft, a
Douglas DC-3C, crashed near
Kvevlax on January 3, 1961, killing all twenty-five people on board. The disaster remains the deadliest civilian aviation accident in the history of Finland. The investigation revealed that both pilots were
intoxicated and should not have been flying.