The incident happened along Northbound I-95 just inside the Philadelphia city limits just after 9:00 p.m. Friday.
State Police say a 61-year-old man was trying to walk back to the airport when he crossed I-95 and was hit in the northbound left lane.
The man, whose name is not being released, was pronounced dead at the scene.
Police say they found debris, possibly from a Chrysler vehicle, at the accident scene.
Black front end molding and what appears to be a black license plate with the word GARMAN was also found at the scene.
Anyone with information should called Pennsylvania State Police at 215-452-5216.