washington airport code

The Washington D.C. metropolitan area is served by three major airports, each with its own unique airport code:
DCA: Ronald Reagan Washington National Airport (closest to downtown D.C.)
IAD: Washington Dulles International Airport (the main international airport)
BWI: Baltimore/Washington International Thurgood Marshall Airport (located further away in Maryland, often has cheaper flights)
When booking flights, you can use these three-letter IATA codes to specify your destination or departure point.