Philadelphia — Washington, D.C. flights are offered by 3 airline(s) including Frontier Airlines, Delta Air Lines, JetBlue Airways.
The cheapest one-way flights are usually available on a Wednesday. The average price of a one-way flight is currently $ 123.46. The lowest price is $ 90.54 departing on local with Frontier Airlines. Philadelphia - PHL is the cheapest airport for flights Philadelphia – Washington, D.C..