Southwest Airlines Co. operates as a passenger airline company that provides scheduled air transportation services in the United States and near-international markets. As of December 31, 2023, the company operated a total fleet of 817 Boeing 737 aircraft; and served 121 destinations in 42 states, the District of Columbia, and the Commonwealth of Puerto Rico, as well as ten near-international countries, including Mexico, Jamaica, the Bahamas, Aruba, the Dominican Republic, Costa Rica, Belize, Cuba, the Cayman Islands, and Turks and Caicos. It also provides inflight entertainment and connectivity services on Wi-Fi enabled aircraft; and Rapid Rewards loyalty program that enables program members to earn points for dollars spent on Southwest base fares. In addition, the company offers a suite of digital platforms to support customers' travel needs, including websites and apps; and SWABIZ, an online booking tool. Further, it provides ancillary services, such as Southwest's EarlyBird Check-In, upgraded boarding, and transportation of pets and unaccompanied minors. Southwest Airlines Co. was incorporated in 1967 and is headquartered in Dallas, Texas.

LATAM Airlines Group S.A., together with its subsidiaries, provides passenger and cargo air transportation services in Chile, Peru, Ecuador, Colombia, Brazil, other Latin American countries, the Caribbean, North America, Europe, and Oceania. It offers other services, such as ground handling, courier, logistics, and maintenance services. As of December 31, 2023, the company provides passenger transport services to 148 destinations in 26 countries and cargo services to 166 destinations in 33 countries; and operated 333 fleet of aircraft. The company was formerly known as LAN Airlines S.A. and changed its name to LATAM Airlines Group S.A. in June 2012. LATAM Airlines Group S.A. was founded in 1929 and is headquartered in Santiago, Chile.

American Airlines Group Inc., through its subsidiaries, operates as a network air carrier. The company provides scheduled air transportation services for passengers and cargo through its hubs in Charlotte, Chicago, Dallas/Fort Worth, Los Angeles, Miami, New York, Philadelphia, Phoenix, and Washington, D.C., as well as through partner gateways in London, Doha, Madrid, Seattle/Tacoma, Sydney, and Tokyo. It operates a mainline fleet of 965 aircraft. 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 1926 and is headquartered in Fort Worth, Texas.

Alaska Air Group, Inc., through its subsidiaries, operates airlines. It operates through three segments: Mainline, Regional, and Horizon. The company offers scheduled air transportation services on Boeing jet aircraft for passengers and cargo in the United States, and in parts of Canada, Mexico, Costa Rica, Belize, Guatemala, and the Bahamas; and for passengers across a shorter distance network within the United States, Canada, and Mexico. Alaska Air Group, Inc. was founded in 1932 and is based in Seattle, Washington.

Sun Country Airlines Holdings, Inc., an air carrier company, operates scheduled passenger, air cargo, charter air transportation, and related services in the United States, Latin America, and internationally. It operates through two segments, Passenger and Cargo. The company also provides crew, maintenance, and insurance services through ad hoc, repeat, short-term, and long-term service contracts; and loyalty program rewards. As of December 31, 2023, its fleet consisted of 60 Boeing 737-NG aircraft, which includes 42 passenger fleet, 12 cargo, and 6 leased to unaffiliated airlines aircraft. The company serves leisure, and visiting friends and relatives passengers; charter and cargo customers; military branches; collegiate and professional sports teams; wholesale tour operators; schools; companies; and other individual entities through its website, call center, and travel agents. Sun Country Airlines Holdings, Inc. was founded in 1983 and is headquartered in Minneapolis, Minnesota.

Controladora Vuela Compañía de Aviación, S.A.B. de C.V., through its subsidiary, Concesionaria Vuela Compañía de Aviación, S.A.P.I. de C.V., provides air transportation services for passengers, cargo, and mail in Mexico and internationally. The company operates approximately 590 daily flights on routes connecting 43 cities in Mexico, 22 cities in the United States, 4 cities in Central America, and 2 cities in South America. As of December 31, 2022, it leased 116 aircrafts and 23 spare engines. The company also offers merchandising, travel agency, and loyalty program, as well as specialized and aeronautical technical services. Controladora Vuela Compañía de Aviación, S.A.B. de C.V. was incorporated in 2005 and is headquartered in Mexico City, Mexico.

Azul S.A., together with its subsidiaries, provides air transportation services in Brazil and internationally. As of December 31, 2023, the company operated approximately 1,000 daily departures to 160 destinations through a network of 300 non-stop routes with an operating fleet of 183 aircraft and a passenger contractual fleet of 189 aircraft. It is involved in the cargo or mail, passenger charter, intellectual property owner, frequent-flyer program, airline operations, travel packages, funding, and aircraft financing activities; and provision of maintenance and hangarage services for aircraft, engines, parts and pieces. The company was incorporated in 2008 and is headquartered in Barueri, Brazil.

Mesa Air Group, Inc. operates as the holding company for Mesa Airlines, Inc. that provides regional air carrier scheduled passenger services. The company offers scheduled flight and cargo services. As of September 30, 2023, it operated a fleet of 80 aircraft with approximately 296 daily departures to 86 cities in the United States and Mexico. Mesa Air Group, Inc. was founded in 1982 and is headquartered in Phoenix, Arizona.