Ronald Reagan Washington National Airport is a public airport located in Crystal City, in Arlington County, Virginia, United States, 5 miles from Washington, D.C. It is the closest airport to Washington, D.C., the nation's capital, the 24th-busiest airport in the nation, the busiest airport in the Washington metropolitan area, and the second busiest in the Washin…Ronald Reagan Washington National Airport is a public airport located in Crystal City, in Arlington County, Virginia, United States, 5 miles from Washington, D.C. It is the closest airport to Washington, D.C., the nation's capital, the 24th-busiest airport in the nation, the busiest airport in the Washington metropolitan area, and the second busiest in the Washington–Baltimore combined statistical area.