Flight Rio de Janeiro - Buenos Aires prices from $120.53

Air Canada is the largest airline in Canada, providing scheduled and charter air transportation for passengers and cargo to over 200 destinations worldwide. The airline operates a fleet of over 400 aircraft, including narrow-body and wide-body jets, and serves both domestic and international routes. Air Canada is a member of the Star Alliance, a global airline network that provides passengers with access to over 1,000 destinations in 190 countries. The airline offers a range of services, including in-flight entertainment, Wi-Fi, and a loyalty program called Aeroplan. Air Canada is headquartered in Montreal, Quebec, and has hubs in Toronto, Vancouver, and Calgary.

British Airways is the flag carrier airline of the United Kingdom, headquartered in London. It is one of the largest airlines in Europe and operates flights to over 180 destinations worldwide. The airline was founded in 1974 and has since grown to become a major player in the aviation industry. British Airways is known for its high-quality service, comfortable seating, and extensive route network. The airline operates a fleet of over 250 aircraft, including the Airbus A380 and Boeing 787 Dreamliner. British Airways is a member of the Oneworld airline alliance and has codeshare agreements with several other airlines.

Fly Emirates is the national airline of the United Arab Emirates (UAE) and one of the largest airlines in the world. It operates over 3,600 flights per week to more than 150 destinations in over 80 countries. The airline is known for its luxurious amenities, including private suites, gourmet dining, and in-flight entertainment. It is also a major sponsor of sports teams and events, including football clubs such as Real Madrid and Arsenal, as well as the ATP tennis tour. Fly Emirates has won numerous awards for its service, including being named the World's Best Airline by Skytrax in 2016.

Hahn Air is a German airline that operates as a scheduled and charter carrier. However, it is best known for its role as a ticketing and distribution service provider for other airlines. Hahn Air has agreements with over 350 airlines worldwide, allowing them to sell their flights through Hahn Air's global distribution system (GDS). This enables travel agents to book flights on airlines that may not be available through traditional GDS systems. Hahn Air also offers its own branded flights to a limited number of destinations in Europe. The airline was founded in 1994 and is headquartered in Dreieich, Germany.

LATAM Airlines is a South American airline that was formed in 2012 through the merger of Chilean airline LAN and Brazilian airline TAM. It is the largest airline in Latin America, operating flights to over 140 destinations in 25 countries. The airline has a fleet of over 300 aircraft, including Boeing 787 Dreamliners and Airbus A350s. LATAM Airlines is a member of the Oneworld airline alliance and has codeshare agreements with several other airlines. The airline offers a range of services, including economy, premium economy, business, and first-class cabins, as well as a frequent flyer program called LATAM Pass.

Qatar Airways is the national airline of Qatar, based in Doha. It was founded in 1993 and has since grown to become one of the world's leading airlines, with a fleet of over 200 aircraft flying to more than 160 destinations worldwide. Qatar Airways is known for its luxurious and award-winning service, offering passengers a range of amenities such as lie-flat seats, gourmet cuisine, and in-flight entertainment. The airline is a member of the oneworld alliance and has partnerships with several other airlines, allowing passengers to easily connect to destinations around the world. Qatar Airways has won numerous awards for its service, including being named the world's best airline by Skytrax in 2019.