United Airlines Holdings is based in Chicago. It is the holding company for both United Airlines and Continental Airlines. United Airlines transports people and cargo not only throughout North America but also destinations in Asia, Europe, the Middle East and Latin America. The carrier's hubs are at Newark Liberty International Airport, Chicago O'Hare International Airport , Denver International Airport , George Bush Intercontinental Airport, Los Angeles International Airport , A.B. Won Pat International Airport, San Francisco International Airport and Washington Dulles International Airport.