Type: 319-131 | Engines: 2 × IAE V2522-A5 | Serial №: 1460 | First flight: Mar 2, 2001 | United Airlines is a major American airline headquartered at the Willis Tower in Chicago, Illinois. United operates a large domestic and international route network. It has 8 hubs, with Chicago–O'Hare being its largest. Airlines is a founding member of the Star Alliance. The United brand name was established by the amalgamation of several airlines in the late 1920s, the oldest of these was founded in…