Washington Dulles International Airport (IAD) is located in Northern Virginia, approximately 26 miles (42 kilometers) west of downtown Washington, D.C. It spans parts of Loudoun and Fairfax counties, primarily in the unincorporated community of Dulles in Loudoun County, with a smaller portion in Chantilly in Fairfax County

. The airport's address is 1 Saarinen Circle, Dulles, VA 20166, USA. It serves as a major international airport for the Washington, D.C. metropolitan area and is one of three major airports in the region along with Ronald Reagan Washington National Airport and Baltimore/Washington International Airport

. The airport was opened in 1962 and named after John Foster Dulles, a former U.S. Secretary of State

. In summary:

• Location: Dulles, Virginia, USA
• Distance from Washington, D.C.: About 26 miles (42 km) west
• Counties: Loudoun and Fairfax
• Nearby communities: Dulles (Loudoun County), Chantilly (Fairfax County)
• Address: 1 Saarinen Cir, Dulles, VA 20166