Originally Posted by
fairviewroad
To the OP: If all you are doing is going to/from the Independence Mall area, you may find that two one-way Regional Rail tickets are all you need. It's painfully unclear on the SEPTA website whether these can be purchased at the airport stations At any rate, the OP could ride to Jefferson Station and back for roughly the same price as an Independence Pass.
All airport trains go to Jefferson Station near all the tourist things, it takes about 30 minutes. I was at PHL in August and they had ticket machines on the track level. Credit cards and one way tickets only, IIRC it was around nine bucks each way.