Washington, D.C. — Philadelphia flights are offered by 3 airline(s) including Spirit Airlines, Southwest Airlines, United Airlines.
The cheapest one-way flights are usually available on a Tuesday. The average price of a one-way flight is currently $ 140.16. The lowest price is $ 120.63 departing on local with Spirit Airlines. Washington, D.C. - BWI is the cheapest airport for flights Washington, D.C. – Philadelphia.