Washington Dulles International Airport (IATA: IAD, ICAO: KIAD, FAA LID: IAD) is a public airport located 25 miles (40 km) west of the central business district of Washington, D.C., in Dulles, Virginia (Loudoun County and Fairfax County, Virginia, United States). It serves the greater Washington, D.C. metropolitan area. The airport is named after John Foster Dulles, United States Secretary of State under Dwight D. Eisenhower. The Dulles main terminal is a well-known landmark designed by Eero Saarinen.
Dulles airport occupies 11,830 acres (47.9 km2) of land, straddling the border of Fairfax County and Loudoun County, Virginia. It is located within two unincorporated communities, Chantilly and Dulles. The airport is west of Herndon and southwest of Sterling. Dulles airport is operated by the Metropolitan Washington Airports Authority.
Dulles is served by nearly a dozen U.S.-flagged carriers and nearly two dozen international carriers. Airlines serving Dulles provide non-stop service to over 80 domestic destinations and to over 40 international destinations. United Airlines maintains its East Coast hub at Dulles and handles 62% of passengers at the airport. JetBlue, which considers Dulles a focus city, handles 6% of passengers, and American Airlines is the airport's third largest carrier and handles 4%. The airport has 143 gates and 14 hard stand locations from which passengers can board or disembark using the airport's trademark PlaneMate airfield vehicles. On a typical day, Dulles sees 1,000 to 1,200 flight operations.