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- List of United Airlines Hubs in the United States
- United Airlines Hub Airport Passenger Traffic
United Hubs: Summary & Terminal Maps+−
- 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)
- Guam International Airport (GUM)
- United Airlines International Hubs
- Star Alliance Member Airline Hubs
United Airlines, headquartered in Chicago, Illinois, is the world’s 3rd largest airline, operating flights to 230+ domestic destinations and over 115 international destinations in 48 countries across five continents. It operates eight major hubs, with Chicago O’Hare being the largest in terms of passenger volume and departures.
This article provides and overview of each of the 8 United hubs, including a terminal map and passenger volume.
List of United Airlines Hubs in the United States
The eight United Airlines hubs in the USA are:
| Airline | City | Hub(s) |
|---|---|---|
| United Airlines | Chicago, Illinois | Chicago O’Hare International Airport (ORD) |
| Denver, CO | Denver International Airport (DEN) | |
| Houston, TX | George Bush Intercontinental Airport (IAH) | |
| Los Angeles, CA | Los Angeles International Airport (LAX) | |
| Newark, NJ | Newark Liberty International Airport (EWR) | |
| San Francisco, CA | San Francisco International Airport (SFO) | |
| Washington D.C. | Washington Dulles International Airport (IAD) | |
| Guam | Antonio B. Won Pat International Airport (GUM) |
As part of its hub-and-spoke business model United operates out of eight hubs that are strategically located, connecting passengers to various domestic and international destinations.
The purpose of these hubs is to serve as a central connecting point for flights, allowing United to transport passengers and goods efficiently between a variety of destinations. Hubs play a crucial role in an United’s network and operations, facilitating the consolidation and transfer of passengers from one flight to another.
United Airlines Hub Airport Passenger Traffic
Here is a table that breaks down the passenger volume for each of the 7 primary hubs. Los Angeles, O’Hare, Denver and San Francisco airports are in the top 10 busiest airports in the United States, by total passenger volume as of 2022.
| Airport | Code | Location | Passenger Traffic |
| Denver International Airport | DEN | Denver, CO | 69,286,461 |
| O’Hare International Airport | ORD | Chicago, IL | 68,340,619 |
| Los Angeles International Airport | LAX | Los Angeles, CA | 65,924,298 |
| Newark Liberty International Airport | EWR | Newark, NJ | 43,402,059 |
| San Francisco International Airport | SFO | San Francisco, CA | 42,281,641 |
| George Bush Intercontinental Airport | IAH | Houston, TX | 40,977,839 |
| Washington Dulles International Airport | IAD | Dulles, VA | 21,376,896 |
United Hubs: Summary & Terminal Maps
Here’s a summary of each United hub, including the total number of terminals and the terminals United flies out of at each airport.
Chicago–O’Hare International Airport (ORD)
Located in Chicago, Illinois, O’Hare International Airport is United’s largest hub and serves as a crucial connecting point. United is the dominant carrier with 47% market share at O’Hare, making it the largest carrier at the airport.
O’Hare is also a hub for American Airlines.
- Number of Terminals: O’Hare has four terminals (Terminal 1, Terminal 2, Terminal 3, and Terminal 5).
- United Flies Out of: United operates primarily out of Terminal 1, also known as Concourse B and Concourse C. Terminal 2 is occasionally used by United for select flights. Terminal 5 is for United international flights.
Denver International Airport (DEN)
United’s hub for the Rocky Mountain region in the United States. With a 42% market share, United is the dominant carrier at Denver. It has become United’s largest hub in terms of flight operations.
- Number of Terminals: Denver has one main terminal with three concourses (Concourse A, Concourse B, and Concourse C).
- United Flies Out of: United primarily operates out of Concourse B, which serves as the main hub for the airline.
Houston–George Bush Intercontinental Airport (IAH)
Houston Intercontinental Airport is United’s hub for the Southern United States and a primary gateway to Latin America. With around 78% of the seat share, United is the dominant carrier at IAH. Houston Intercontinental became a United hub via it’s acquisition of Continental Airlines in 2010.
- Number of Terminals: Houston Intercontinental has five terminals (Terminal A, Terminal B, Terminal C, Terminal D, and Terminal E).
- United Flies Out of: United operates primarily out of Terminal C, which is its main hub at Houston Intercontinental. Terminal E is for United’s international flights and they use the other terminals for some United Express flights.
Los Angeles International Airport (LAX)
United’s secondary hub for the West Coast, acting as a gateway to Asia and Australia. United holds approximately 15% of the market share at LAX, making it the third-largest carrier at the airport.
LAX is also a hub for Delta Airlines, American Airlines and Alaska Airlines.
- Number of Terminals: LAX has nine terminals (Terminal 1 to Terminal 9).
- United Flies Out of: United primarily operates out of Terminal 7, which is its main hub at LAX and Terminal 8 for International flights.
Newark Liberty International Airport (EWR)
Newark Airport is United’s primary hub for the East Coast and a gateway to Europe, with select flights to Latin America, Africa, and Asia. United has 68% market share at Newark, making it the airport’s largest carrier. Newark became a United hub via it’s acquisition of Continental Airlines in 2010.
- Number of Terminals: Newark Liberty has three terminals (Terminal A, Terminal B, and Terminal C).
- United Flies Out of: United operates primarily out of Terminal C, which serves as its main hub at Newark Liberty. The airline also uses Terminal A for select flights and Terminal B for International flights.
San Francisco International Airport (SFO)
United’s primary hub for the West Coast and a gateway to Asia and Australasia. United holds approximately 46% of the market share at SFO, making it the largest carrier at the airport.
- Number of Terminals: San Francisco International has four terminals (Terminal 1, Terminal 2, Terminal 3, and the International Terminal).
- United Flies Out of: United primarily operates out of Terminal 3, which is its main hub at SFO. The airline also uses Terminal 2 for select flights and the International Terminal for International flights.
Washington Dulles International Airport (IAD)
United’s secondary hub for the East Coast and a gateway to Europe and Africa. With approximately 65% of the market share, United is the dominant carrier at Washington Dulles.
- Number of Terminals: Washington Dulles has a main terminal and two satellite terminals with five concourses (Concourse A, B, C, D and Z).
- United Flies Out of: United operates primarily out of Terminals C and D, with some United Express flights using Terminals A and Z.
Guam International Airport (GUM)
Serving as United’s hub for a handful of Pacific region flights, Guam International has a 98.8% market share, making United the airport’s primary carrier.
While Guam is officially considered a United Hub, it’s a very small airport that only operates a handful of flights around Asia. It only has a fraction of the passenger volume the seven other United hubs have.
- Number of Terminals: Guam International has a single terminal building.
- United Flies Out of: United operates out of the main terminal at Guam International Airport.
United Airlines International Hubs
While they are not true United “hubs”, the following is a list of other International airports where United and its Star alliance partners operate a significant number of flights (including links to their Terminal map):
- Frankfurt, Germany — Frankfurt International Airport (FRA)
- London, United Kingdom — London Heathrow International Airport (LHR)
- São Paulo, Brazil — Guarulhos International Airport (GRU)
- Tokyo, Japan — Tokyo Haneda Airport (HND)
- Tokyo, Japan — Tokyo Narita Airport (NRT)
Star Alliance Member Airline Hubs
As a founding member of the Star Alliance, below are some of the other Star Alliance airline hubs that you can connect through when flying United:
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