Washington Dulles International Airport (IATA: IAD, ICAO: KIAD, FAA LID: IAD) is a public airport in Dulles, Virginia, 26 miles (41.6 km) west of downtown Washington, D.C. The airport serves the Baltimore-Washington-Northern Virginia metropolitan area centered on the District of Columbia.
It is named after John Foster Dulles, Secretary of State under Dwight D. Eisenhower. The Dulles main terminal is a well-known landmark designed by Eero Saarinen. Operated by the Metropolitan Washington Airports Authority, Dulles Airport occupies 11,830 acres (47.9 km2) straddling the border of Fairfax County and Loudoun County, Virginia.