Delta Air Lines (DL, Atlanta Hartsfield Jackson) has applied for beyond-perimeter slot exemption at Washington National to enable the launch of flights to the US West Coast.

In its application to the US Department of Transportation (DOT), Delta said it wanted to switch its current Washington National-Salt Lake City service to Washington National-Los Angeles International, effective April 2017.

At present, Washington National's operations are subject to a Perimeter Rule which limits non-stop service to 1,250 statute miles (2,011 kilometres). However, recent federal exemptions have seen the following extra-peripheral cities being served: Austin-Bergstrom International, Denver International, Las Vegas Harry Reid, Los Angeles, Phoenix Sky Harbor, Salt Lake City, San Francisco, San Juan Luis Muñoz Marin, Seattle Tacoma International, and Portland International.