About the airport Owned by King County and managed by the county's Department of Executive Services, King County International Airport-Boeing Field is one of the busiest general aviation airports in the country. It serves all sizes and types of aircraft, fills a wide range of commercial and recreational needs, and is home base for about 150 businesses - including air cargo companies, flight schools, charter operations, and helicopter services. Our tenants also include hundreds of small aircraft owners who use their planes for recreation and business.