Question: Which airport is closer to Washington D.C., Washington Dulles International Airport or Gainesville Regional Airport?
Sentence (from "Washington Dulles International Airport"): Washington Dulles International Airport (IATA: IAD, ICAO: KIAD, FAA LID: IAD) is an international airport in Loudoun and Fairfax counties in Virginia, United States, 26 miles (42 km) west of downtown Washington, D.C. The airport serves the Baltimore–Washington metropolitan area, centered on the District of Columbia.
Relevant evidence: Yes