My sister's flight has been delayed and she will be spending the night in Philadelphia. So of course I had on thought: Cheesesteak! She probably won't want to travel far since she has to fly out the next morning.
I know Pat's and Geno's are the "famous" ones, but they seem a bit far. Plus, being from Los Angeles, she will not do public transportation. Anything decent closer to the airport, maybe a short cab ride away?