 Ronald Reagan Washington National Airport is the closest—located in Arlington County, Virginia, just across the Potomac River from Hains Point, and accessible via Washington Metro.The airport is conveniently located near to the downtown area; however, it has somewhat restricted flights to airports within the United States because of noise and security concerns.Most major international flights arrive and depart from Washington Dulles International Airport , located west of the city in Fairfax and Loudoun counties in Virginia.