The initial Perimeter Rule limited non-stop service to/from Reagan National to 650 statute miles, with some exceptions for previously existing service. By the mid-1980s, Congress had expanded Reagan National non-stop service to 1,250 statute miles (
49 U.S. Code § 49109). Ultimately, Reagan National serves primarily as a "short-haul" airport while Washington Dulles International Airport serves as the region's "long-haul" growth airport.
Congress must propose and approve federal legislation to allow the U.S. Department of Transportation to issue "beyond-perimeter" exemptions which allows an airline to operate non-stop service to cities outside the perimeter. As a result of recent federal exemptions, non-stop service is now offered between Reagan National and the following cities: Austin, Denver, Las Vegas, Los Angeles, Phoenix, Salt Lake City, San Francisco, San Juan, Seattle and Portland, Ore.