Winona Municipal Airport (IATA: ONA, ICAO: KONA), also known as Max Conrad Field, is a public airport located three miles (five km) northwest of the central business district (CBD) of Winona, Minnesota and adjacent to Goodview along the Mississippi River, in Winona County, Minnesota, USA. It serves general aviation for Winona and the surrounding area. The airport covers 575 acres (233 ha) and has two runways.