Régional was formed on 30 March 2001 with the merger of Regional Airlines, Flandre Air, and Proteus Airlines.
United Airlines | American Airlines | Continental Airlines | Northwest Airlines | Trans World Airlines | Pakistan International Airlines | Southwest Airlines | Singapore Airlines | Trans Australia Airlines | Pacific Southwest Airlines | Malaysia Airlines | Turkish Airlines | Japan Airlines | Proteus | China Airlines | Canadian Airlines | American Eagle Airlines | American Airlines Flight 11 | Western Airlines | LAN Airlines | Kingfisher Airlines | Vietnam Airlines | United Airlines Flight 175 | SkyWest Airlines | Regional Express Airlines | Cameroon Airlines | United Airlines Flight 93 | TACA Airlines | ATA Airlines | American Airlines Arena |