Everything everyone else says about Philadelphia International Airport, I agree 100%.
I travel for business, almost weekly, and this is the worst airport of the bunch! Everything from parking, to baggage handling, to on-time departure (now, that's a joke) is a major hassle at PHL.
I highly recommend using one of the "Valet Parking" lots around the airport. The one I use all the time is Winner Airport Valet Parking, on Essington Avenue. For about $10.00 a day, these folks will take you to the airport from their lot, handle your bags at curbside checking, then take your car back to their lot. While you're vacationing, they'll change your oil, wash your car, or do other services, for an extra fee.
When you return from vacation, simply call from the airport after getting your bags, or use your cellphone while walking to the curb with your carry-on. AND (here's the best part), you can elect to "drive off" from the airport...for only an extra $10.00 (hey, the guy has to get back to the lot somehow...). I love coming back, and leaving directly from the airport, from the arrivals curb.
If you have
AAA, they provide a 10% discount. If you have coupons from other lots, they'll honor them.
Simply arrive at their lot about 30 minutes before you'd normally get to the airport for your flight out.
To get to Winner, get off of I-95 at Island Avenue, and go north on Island to Bertram. Turn right at the light at Bertrum and go two lights to Essington Avenue and turn left. Travel about a mile, and look for the red blinkiing lights for Winner Airport Valet Parking...it's on the left.
I hope this helps!