Most airports feature on-site parking and secured off-site parking. Another type of parking is meet-and-greet parking, where the traveler pulls up to the terminal, hands his keys to a staff member, and the staff member drives his car to a secure lot.
Most of the on-site airport parking fills up fast, and prices for it are higher than off-site options. While off-site parking is further from the airport, it is also cheaper and many airports offer a free shuttle service to the terminals. The shuttle services for off-site parking lots run by airports are often cramped, private lots offer a higher level of service and often feature valets to carry luggage and transport vehicles to parking spaces.