All 25 people on board Aero Flight 311 died in Finland's worst civilian air accident when the aircraft crashed near Kvevlax.

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

Kvevlax is a church village in the municipality of Korsholm, Finland. It is located approximately 15 kilometres (9 mi) north of the city of Vaasa. Kvevlax became an independent parish in 1857. Until 1 January 1973 it was an independent municipality. Kvevlax has a lower grade primary education school, a kindergarten, a running track, a football pitch and an ice rink. There are two local grocery shops, a library and a bank.