American Airlines, Inc. (AA) is a major U.S. airline headquartered in Fort Worth, Texas. It operates an extensive international and domestic network, with scheduled flights throughout North America, the Caribbean, South America, Europe, and Asia. Its route network centers around five "cornerstone" hubs in Dallas/Fort Worth, New York, Los Angeles, Miami and Chicago. Its primary maintenance base is located at Tulsa International Airport (TUL). American is part of the Oneworld airline alliance, and coordinates fares, services and scheduling with British Airways and Iberia in the transatlantic market and with Japan Airlines and Qantas in the transpacific market. American Eagle Airlines, SkyWest, Inc., SkyWest Airlines and ExpressJet Airlines operate regional flights for American Airlines under the "American Eagle" brand. Chautauqua Airlines also feeds the American Airlines network under the AmericanConnection brand.