Ronald Reagan Washington National Airport, referred to colloquially as Reagan Airport, Reagan National, and National Airport, is a civil airport located in Crystal City, Virginia, in Arlington County, Virginia, 5 miles (8.0 km) from Washington, D.C. It is the closest airport to Washington, D.C., the nation's capital, the 23rd-busiest airport in the nation, and the busiest airport in both the Washington metropolitan area and the Washington–Baltimore combined statistical area.

An IATA airport code, also known as an IATA location identifier, IATA station code, or simply a location identifier, is a three-letter geocode designating many airports and metropolitan areas around the world, defined by the International Air Transport Association (IATA). The characters prominently displayed on baggage tags attached at airport check-in desks are an example of a way these codes are used.