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FAQ: Washington, DC Airports. Flying into Washington, DC. There are three major airports in the Washington, DC region: Ronald Reagan Washington National Airport (airport code: DCA), Washington Dulles International Airport (airport code: IAD) and Baltimore/Washington International Thurgood Marshall Airport (airport code: BWI). All three offer multiple U.S. and international flights daily.
Best Answer: Im from DC area, and it would be Ronald Reagan Washington National Airport, commonly known as National Airport, is located in Arlington County, Virginia and is the closest airport to downtown Washington, DC.