American Airlines, Inc. (AA) is a major United States-based airline, operating an extensive international and domestic network, and is the world's largest airline by fleet size and revenue, and the second-most by number of destinations, only after United Airlines. It operates from its main hub at Dallas/Fort Worth, and its hubs at Charlotte, Los Angeles, New York-JFK, Miami, Chicago-O'Hare, Philadelphia, Phoenix, and Washington, D.C., while its primary maintenance base is at Tulsa International Airport. The company, which is headquartered in Fort Worth, Texas, also has a significant presence in Atlanta, Boston, London-Heathrow, New York-LaGuardia, Raleigh-Durham, San Antonio, and San Francisco. The airline primarily competes with Delta, United, and Southwest.
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