Paine Field (IATA: PAE, ICAO: KPAE, FAA LID: PAE), also known as Snohomish County Airport, is a small international airport serving part of the Seattle metropolitan area in the U.S. state of Washington. It is located in unincorporated Snohomish County, between the cities of Mukilteo and Everett, about 30 miles (48 km) north of Seattle. The airport was built in 1936 and began commercial service in 1939. The Army Air Corps began occupation of Paine Field for military use. The airport briefly returned to civilian use in the late 1940s, before conversion into an air force base during the Korean War. In 1966, the Boeing Company selected Paine Field for the site of its Everett assembly plant as part of the Boeing 747 program. By the 1970s, the airport had grown into a hub for light aviation and manufacturing, lacking commercial service.