Dulles International Airport (IAD)1 Saarinen Circle, Sterling, VA 20166
Washington Dulles International Airport (IAD), gateway to Washington D.C. and northern Virginia, is located 26 miles from downtown Washington, D.C. in Fairfax County, Virginia. Allegiant flies from the main terminal at IAD which offers a host of familiar options for shopping and dining both pre and post-security. Parking at IAD is a breeze with options ranging from valet to long term to economy. Parking can even be reserved in advance.