American Airlines Group Inc., through its subsidiaries, operates as a network air carrier. It provides scheduled air transportation services for passengers and cargo. As of December 31, 2016, the company operated a mainline fleet of 930 aircraft. It serves 350 destinations in approximately 50 countries, principally from its hubs in Charlotte, Chicago, Dallas/Fort Worth, Los Angeles, Miami, New York, Philadelphia, and Phoenix, as well as in Washington, D.C. The company was formerly known as AMR Corporation and changed its name to American Airlines Group Inc. in December 2013. American Airlines Group Inc. was founded in 1934 and is headquartered in Fort Worth, Texas.