HPLASOps - $12 plus $25 flat rate Center City to Airport cab fare (not including tip).
The best answer will really depend on where you (TA) will be originating in NYC and how much money and time you have. NJTransit - Septa - Septa R1 is probably the least expensive, but it is a LOOONG ride. Any faster train with Amtrak will cost $$$. I have seen van services that offer the ride for approx $55 but I really couldn't recommend anyone (it may be worth a Google search). I'd rent a car personally, but anytime after 3pm in the South Jersey/Philly area on a weekday may prove hectic to navigate, let alone weather and traffic.
Fares from LGA
are expensive. I've been lucky at least once finding a one-way HVN-PHL
fare for $79 + taxes.
You land a million planes safely, then you have one little mid-air and you never hear the end of it - Pushing Tin