The airport has over 25,000 parking spaces and parking rates that are among the lowest anywhere in the country. In 2001, additional 5,600 spaces were added with the new Terminal A/B Garage situated between terminals A and B. In 2005, with the addition of Terminal E a new garage with 2,500 more spaces was added. Terminal C covered parking is also available. All vehicles entering the A/B and Terminal C garages will be searched by security personnel.
The Houston Airport System also operates Parking Cents, the city's economy lot, which provides parking at the corner of Greens Road and John F. Kennedy Blvd., with free shuttle service to the terminals. In addition to the Parking Cents lot, there are also a number of Off-Airport parking facilities with courtesy shuttles that travelers can choose from.
At the Passenger Pick Up Waiting Lot, located off of Will Clayton Parkway, you can wait - free - under the supervision of a security officer until your arriving party have picked up their checked bags.
The Parking Cents Lot can accommodate oversized vehicles such as campers, large trucks, etc. The entrance for these vehicles is at the north gate located off JFK Boulevard's feeder road.
Source: www.fly2houston.com