Ronald Reagan Washington National Airport ( IATA : DCA , ICAO : KDCA , FAA LID : DCA ) is a public airport 3 miles ( 4.8 km ) south of downtown Washington , D.C. , in Arlington County , Virginia .
Washington National Airport ( IATA : DCA , ICAO : KDCA , FAA LID : DCA ) is an airport near Washington , D.C. .