The closest airport to Washington, D.C., Ronald Reagan Washington National Airport (DCA) is in Arlington County, Virginia, 5 miles from the U.S. capital. It sends planes to over 110 destinations and is one of the busiest airports in the country, serving nearly 13 million passengers in 2024.Reagan National, often simply referred to as National or DCA by locals, is mandated by the federal government to serve only short-haul flights, with long-haul flights for D.C. reserved for Washington Dulles International ...