American Airlines Group Inc, formerly known as AMR Corp was incorporated in October 1982 and operates in the airline industry. It is a holding company engaged in operation of a network air carrier through its subsidiaries American Airlines, Inc. (American), US Airways Group, Inc. It operates the airline as measured by revenue passenger miles (RPMs) and available seat miles (ASMs). It has hubs in Charlotte, Chicago, Dallas/Fort Worth, Los Angeles, Miami, New York City, Philadelphia, Phoenix and Washington, D.C. Together with American Eagle and US Airways Express, it operates an average of nearly 6,700 flights per day to 350 destinations in 50 countries. In 2015, the Company had approximately 201 million passengers boarding its mainline and regional flights, respectively. As of 31 December 2015, it operated 946 mainline aircraft and was supported by regional airline subsidiaries and third-party regional carriers, which operated an additional 587 regional aircraft. It operates in five main domestic markets, which includes Chicago, Dallas/Fort Worth, Los Angeles, Miami, and New York City. The Company is subject to domestic and international regulatory requirements.