Washington Dulles International Airport (IATA: IAD, ICAO: KIAD, FAA LID: IAD), typically referred to as Dulles International Airport, Dulles Airport, Washington Dulles, or simply Dulles (/ ˈdʌlɪs/ DUL-iss), is an international airport in the Eastern United States, located in Loudoun County and Fairfax County in Virginia ...