Rates in Philadelphia begin around $20 a day and $120 a week for an economy car with air-conditioning, an automatic transmission, and unlimited mileage. This does not include airport surcharges and the tax on car rentals, which is 9%.
In Philadelphia and the surrounding areas you must be 21 to rent a car, and rates may be higher if you're under 25. Child seats are compulsory for children under eight. Non-U.S. residents need a reservation voucher (for prepaid reservations that were made in the traveler's home country), a passport, a driver's license, and a travel policy that covers each driver, when picking up a car.