The airport has three terminals – Terminal 2, Terminal 3 and Terminal 4 – each with its own parking garage, shops, restaurants, and ground transportation. Sky Harbor’s easily accessible Rental Car Center houses all the airport rental car company counters and fleets. A multi-colored “Rental Car Shuttle” provides free transportation from the airport curb at the baggage claim level to the Rental Car Center, just west of Sky Harbor. A free shuttle system also provides travel between the terminals. Moreover, there are 23 domestic and international airlines operating at Sky Harbor, the two largest being US Airways and Southwest.