Is Dulles Airport in Washington, D.C.?

No. Washington Dulles International Airport (IAD) is located in Chantilly, Virginia, approximately 26 miles (42 km) west of downtown Washington, D.C.

While it serves the D.C. metropolitan area—alongside Reagan National (DCA) and Baltimore/Washington (BWI)—it lies outside the District's borders in Fairfax and Loudoun counties.

Travel time to central D.C. is typically 40–60 minutes by car via the Dulles Access Road and I-66, or via the Silver Line Metro (opened 2022).