American Airlines is one of the biggest scheduled passenger carriers in the world and has one of the largest fleets in the world. It is owned by the AMR Corporation, whose company headquarters are at Dallas/Fort Worth International Airport. Texas. The Airline Group consists of American's passenger and cargo divisions and AMR Eagle Inc. a subsidiary of AMR. American Airlines' international operation is supported by a vast domestic network; local feeder services are provided by American Eagle which has four feeder subsidiaries — Executive Airlines. Flagship Airlines, Simmons Airlines and Wings West Airlines. These companies work smaller operations with a connecting turboprop service reaching out into every corner of the United States.