Fergus Falls Municipal Airport (IATA: FFM, ICAO: KFFM, FAA LID: FFM), also known as Einar Mickelson Field, is a public airport located three miles (5 km) west of the central business district (CBD) of Fergus Falls, a city in Otter Tail County, Minnesota, United States. It covers 731 acres (296 ha) and has two runways. It is primarily used for general aviation. The airport was formerly served by Northwest Airlink and United Express.