Mexico City MEX to Rio de Janeiro, RJ RIO flight with COPA Airlines

United Airlines, established in 1926, is a major U.S. airline headquartered in Chicago, Illinois. Operating an extensive domestic and international network, United serves more destinations than any other airline, connecting travelers across six continents. The airline's eight hubs include Chicago–O'Hare, Denver, Houston–Intercontinental, Los Angeles, Newark, San Francisco, Washington–Dulles, and Guam. As a founding member of the Star Alliance, United offers a comprehensive range of services, including regional flights through United Express, catering to both leisure and business travelers. The airline is committed to sustainability, investing in sustainable aviation fuel and innovative technologies to reduce its environmental impact.

Avianca is the national and largest airline of Colombia, and one of the oldest airlines in the world, tracing its origins back to 1919. It serves as the flagship of a group of airlines across the Americas, operating under a codesharing system. Avianca boasts an extensive network of destinations throughout the Americas, with its main hub located at El Dorado International Airport in Bogotá. The airline is a member of the Star Alliance, offering various classes of service from economy to business and first-class. Its fleet includes modern aircraft such as the Airbus A320 family, Airbus A330, and Boeing 787 Dreamliner.

Aerolíneas Argentinas is Argentina's state-owned flag carrier and largest airline, operating since 1950. It serves over sixty domestic and international destinations across South America, the Caribbean, North America, and Europe. The airline's main operational hubs are Aeroparque Jorge Newbery for domestic and regional flights, and Ministro Pistarini International Airport (Ezeiza) for long-haul services, both located in Buenos Aires. Aerolíneas Argentinas is a member of the SkyTeam alliance, joining in 2012 as its first and only South American partner. The group also includes cargo services (Aerolíneas Cargo and Jet Paq) and a tourism operator (Optar).

LATAM Airlines Peru, a subsidiary of LATAM Airlines Group, is a major airline based in Lima, Peru, and the dominant carrier in the Peruvian domestic market. It operates scheduled domestic and international flights, with its main hub at Jorge Chávez International Airport. The airline was formerly known as LAN Perú S.A. until 2015, when it was dissolved and rebranded as LATAM Airlines as part of the merger between LAN Airlines and TAM Airlines. LATAM Airlines Group, the parent company, is the largest airline group in South America.

Aeromexico, Mexico's flag carrier, was established in 1934 as Aeronaves de México. It operates over 600 daily flights from its main hub at Mexico City International Airport to 89 cities across three continents, including destinations in Mexico, the United States, Latin America, Europe, Canada, and Asia. As a founding member of the SkyTeam airline alliance, Aeromexico partners with 20 airlines, offering access to over 1,000 destinations in 177 countries. The airline's fleet includes Boeing 787 and 737 jet airliners, and Embraer 190 models.