Ronald Reagan Washington National Airport (IATA: DCA, ICAO: KDCA, FAA LID: DCA) is a major airport 3 miles (5 km) south of downtown Washington, D.C., in Arlington County, Virginia. It is the nearest commercial airport to Washington, D.C and serves the Baltimore-Washington Metropolitan Area. For decades it was called Washington National Airport; it was renamed in 1998 to honor former U.S. President Ronald Reagan.