Boeing Field, officially King County International Airport (IATA: BFI, ICAO: KBFI, FAA LID: BFI), is a public airport owned and operated by King County, five miles south of downtown Seattle, Washington. The airport is sometimes referred to as KCIA, but this is not the airport identifier. The airport has some passenger service, but is mostly used by general aviation and cargo. It is named for the founder of Boeing, William E. Boeing.
The airport's property is mostly in Seattle just south of Georgetown, with its southern tip extending into Tukwila. It covers 634 acres (257 ha) and has more than 375,000 operations yearly.
It is in the National Plan of Integrated Airport Systems for 2011–2015, which called it a primary commercial service airport. Federal Aviation Administration records say the airport had 34,597 passenger boardings (enplanements) in calendar year 2008, 35,863 in 2009 and 33,656 in 2010.