Typically, most car rentals require only a valid United States-issued driver’s license when you pick up a car rental at Philadelphia Airport. For international drivers, you will be required to present a valid driver’s license from your home country along with a valid passport. However, some Philadelphia Airport car rental locations may require additional documentation, including proof of insurance if you’re not purchasing a cover from them, among other documents. Checking the requirements of your car rental company in advance will save you time and frustration. Nevertheless, if you are at least 21 years old, you can access a car rental at Philadelphia Airport. However, if you are under 25, most vehicle rental companies may charge you an extra cost. Furthermore, the age restriction may apply for luxury, large-capacity SUVs, and other higher-category cars.