Dulles, often referred to as Washington Dulles International Airport, is the primary airport serving the Washington, D.C. metropolitan area. It is important to note that Dulles itself is a single airport rather than a region with multiple airports. While there are other airports in the vicinity of Washington, D.C., such as Ronald Reagan Washington National Airport (DCA) and Baltimore/Washington International Thurgood Marshall Airport (BWI), Dulles remains a key transportation hub for domestic and international flights.