United Airlines operates a hub-and-spoke network with eight major U.S. hubs plus several international gateways. The primary U.S. hubs are:
- Chicago O’Hare International Airport (ORD)
- Denver International Airport (DEN)
- Houston George Bush Intercontinental Airport (IAH)
- Los Angeles International Airport (LAX)
- Newark Liberty International Airport (EWR)
- San Francisco International Airport (SFO)
- Washington Dulles International Airport (IAD)
Additionally, United maintains a smaller hub in Guam (Antonio B. Won Pat International Airport, GUM) which serves as a mid-pacific gateway. Internationally, United emphasizes key gateways at Frankfurt (FRA) and London Heathrow (LHR), along with other major international gateways like São Paulo (GRU), Tokyo airports (HND/NRT), and others, as part of its broader network. These hubs support United’s transcontinental and international operations, feeding traffic to both domestic and international destinations.
