Washington, D.C. — Philadelphia flights are offered by 2 airline(s) including Spirit Airlines, Southwest Airlines.
The cheapest one-way flights are usually available on a Tuesday. The average price of a one-way flight is currently $ 139.19. The lowest price is $ 121.93 departing on local with Spirit Airlines. Washington, D.C. - BWI is the cheapest airport for flights Washington, D.C. – Philadelphia.