American Airlines Group is a holding company. Through its subsidiaries, the company's business activity is the operation of a primary network carrier, providing scheduled air transportation for passengers and cargo. The company's regional carriers provide scheduled air transportation under American Eagle. The American Eagle carriers include the company's regional carriers Envoy Aviation Group Inc., PSA Airlines, Inc. and Piedmont Airlines, Inc., as well as third-party regional carriers including Republic Airline Inc., Mesa Airlines, Inc., SkyWest Airlines, Inc. and Compass Airlines, LLC. The company's cargo division provides freight and mail services, with facilities and interline connections available across the globe.

Delta Air Lines provides scheduled air transportation for passengers and cargo. The company serves the Transatlantic, Transpacific and Latin America markets directly on the company and through joint ventures with airline partners. Internationally, the company has hubs and market presence in Amsterdam, London-Heathrow, Mexico City, Paris-Charles de Gaulle and Seoul-Incheon. These arrangements are commercial joint ventures that include joint sales and marketing coordination, co-location of airport facilities and other commercial cooperation arrangements. The company has other businesses arising from its airline operations, including providing maintenance and engineering support for its regional aircraft.

Southwest Airlines operates Southwest Airlines, a passenger airline that provides scheduled air transportation in the United States and near-international markets. The company has Boeing 737 aircraft in its fleet and serves destinations in various states, the District of Columbia, the Commonwealth of Puerto Rico, and other near-international countries such as Mexico, Jamaica, The Bahamas, Aruba, Dominican Republic, Costa Rica, Belize, Cuba, the Cayman Islands, and Turks and Caicos. The company principally provides point-to-point service, which allows for direct nonstop routing. The company also provides a suite of digital platforms to support Customers' needs prior to and during the course of their travel.

United Airlines Holdings is a holding company and its principal, wholly-owned subsidiary is United Airlines, Inc. (United). The company is engaged in the transportation of people and cargo throughout North America and to destinations in Asia, Europe, Africa, the Pacific, the Middle East and Latin America. The company, through United and its regional carriers, operates flights to airports, with its hubs at Newark Liberty International Airport, Chicago O'Hare International Airport, Denver International Airport, George Bush Intercontinental Airport, Los Angeles International Airport, A.B. Won Pat International Airport, San Francisco International Airport and Washington Dulles International Airport.