Which airlines have hubs in Houston?

Houston is a major airline hub city in the United States. Several major domestic and international carriers operate large connecting hub operations from Houston’s two main airports – George Bush Intercontinental Airport and William P. Hobby Airport.

The airlines that have designated Houston as a hub include:

  • United Airlines
  • Southwest Airlines
  • Delta Air Lines

These airlines provide extensive nonstop flights to destinations across the U.S., North America, Latin America, Europe, and Asia from their Houston hubs. They also offer many connecting flight options through Houston.

Having a hub in Houston provides airlines with a crucial strategic foothold serving the large Houston metro area market and the connecting traffic flows between destinations in various regions.

Key Takeaways:

  • United Airlines, Southwest Airlines, and Delta Air Lines operate major hubs at Houston airports.
  • George Bush Intercontinental Airport is United’s international gateway hub.
  • Hobby Airport is Southwest’s domestic hub.
  • Delta uses Bush Intercontinental as a domestic hub.
  • Houston hubs allow airlines to serve local passengers and offer connecting flights.

Why Do Airlines Establish Hubs in Houston?

There are several key reasons why major airlines have established hub operations in Houston:

Large Local Market

The Houston metropolitan area has around 7 million residents, making it one of the largest metro populations in the United States. Operating a hub in Houston allows airlines to serve this massive local market.

Strategic Geographic Location

Houston is located centrally on the Gulf Coast, which provides an ideal base to connect flights from various regions. The city is conveniently situated between the major west and east coast markets.

High Demand for Air Travel

As a major oil and gas industry center with large multinational corporations, Houston generates immense demand for both domestic and international business air travel. The city also attracts significant leisure and tourism travel.

Business-Friendly Environment

Texas has lower taxes and regulations that make it attractive for airlines to conduct operations. Houston also offers incentives to airlines to encourage hub development.

Excellent Airport Infrastructure

Houston has two airports that provide plenty of capacity for hub operations. George Bush Intercontinental offers an expansive network of international routes. Hobby provides a strong domestic hub.

United Airlines Hub at Houston

United Airlines operates its largest U.S. international gateway hub at George Bush Intercontinental Airport in Houston. The Houston hub is one of United’s most strategic hubs and an essential connecting point in its global route network.

Here are some key facts about United’s Houston hub:

  • Share of Airport Traffic: United accounts for around 60% of passenger traffic at Bush Intercontinental Airport. This makes it the dominant airline at the airport.
  • Daily Departures: United operates around 480 daily departures out of Houston throughout its system. This includes domestic and international flights.
  • Number of Gates: United leases around 115 gates on Terminals B, C, E, and F at Bush Intercontinental to accommodate its extensive Houston hub operations.
  • Mainline vs Regional Jets: United uses a mix of mainline and regional jet aircraft at the Houston hub. Widebody long-haul planes connect to international destinations while regional jets primarily fly domestic routes.
  • International Destinations: United flies nonstop to over 55 international destinations from Houston including cities in Latin America, Europe, and Asia. It provides connectivity between these global destinations and its U.S. network.
  • Domestic Hubs Connected: As a connecting hub, Houston provides links between United’s west coast hubs and east coast hubs. Many domestic flights connect midwest cities to United’s Houston hub.
  • Originating Houston Passengers: United carries around 17 million local passengers just from the Houston metro area annually. This makes Houston one of United’s largest local markets.
  • Total Annual Passengers: Over 22 million total passengers flew through United’s Houston hub in 2022. This includes local Houston passengers as well as connecting flyers.

Overall, United’s massive Houston hub is critically important for providing domestic and international connectivity across its global network. It serves as United’s gateway to Latin America and allows connecting flights between the Americas and other continents.

Southwest Airlines Hub at Houston

Southwest Airlines operates a major domestic hub at William P. Hobby Airport in Houston. This hub complements Southwest’s other hubs across the U.S.

Here are key details on Southwest’s Houston Hobby hub operations:

  • Daily Departures: Southwest runs around 240 daily departures from Houston Hobby on peak travel days. This makes Houston one of Southwest’s busiest hubs.
  • Number of Gates: Southwest leases 40 gates at Hobby Airport’s centralized terminal to support its high flight volumes.
  • Markets Served: Southwest connects Houston to about 65 cities nonstop across the U.S. and near international destinations including Mexico.
  • Aircraft Types: Southwest exclusively uses Boeing 737 aircraft at the Houston hub. This includes 737-700, 737-800, and 737 MAX 8 models.
  • Originating Houston Passengers: Southwest flies over 15 million local Houston passengers each year, primarily within Texas and other U.S. states.
  • Total Annual Passengers: Southwest served around 17 million total passengers through its Houston Hobby hub in 2022. This includes local flyers and connecting passengers.
  • Share of Airport Traffic: Southwest accounts for over 85% of passenger traffic at Hobby Airport, making it by far the dominant airline.
  • International Service: Southwest offers flights to several destinations in Mexico and Central America from Houston as it continues expanding limited international service.

Overall, the Houston Hobby hub is one of Southwest’s most important domestic hubs and provides critical connectivity across its U.S. route map. Houston is Southwest’s second largest hub after Chicago Midway.

Delta Air Lines Hub at Houston

Delta Air Lines operates a domestic hub at George Bush Intercontinental Airport, competing directly against United’s hub at the same airport.

Here are some details on Delta’s operations in Houston:

  • Daily Departures: Delta runs around 160 daily departures from Houston throughout its domestic network. This is significantly smaller than United’s hub.
  • Number of Gates: Delta leases around 18 gates at Bush Intercontinental Airport, mostly located in Terminals D and E.
  • Mainline vs Regional Jets: Delta uses a mix of Airbus, Boeing, and McDonnell Douglas mainline jets as well as regional jet partners to serve its Houston routes.
  • Domestic Markets Served: From its Houston hub, Delta serves about 50 domestic destinations primarily focused on major cities across the southern and eastern U.S.
  • International Service: Delta offers limited international service from Houston including flights to cities in Mexico and Latin America. Most international traffic connects through Delta’s other hubs.
  • Originating Houston Passengers: Delta flies about 5 million local passengers from the Houston metro area each year.
  • Total Annual Passengers: Approximately 6.5 million total passengers flew through Delta’s Houston hub in 2022. This includes local and connecting traffic.
  • Airport Presence: Delta has a much smaller presence at Bush Intercontinental compared to dominant hub carrier United. Delta accounts for around 15% of passenger traffic.

While small compared to rivals, Delta’s Houston hub provides an important foothold in the crucial Texas market and connectivity across the southern U.S.

Where Are Southwest’s Main Hub Airports?

In addition to Houston Hobby, Southwest Airlines maintains major hubs at:

  • Chicago Midway International Airport: Southwest’s largest hub with around 250 daily departures. Provides service across the Midwest and East Coast.
  • Baltimore/Washington International Airport: D.C. area hub with about 225 daily departures. Connects Northeast corridors.
  • Dallas Love Field: Around 175 daily flights connect Southwest’s Texas hub to major markets.
  • Denver International Airport: High-altitude hub offers around 170 daily departures connecting the Rockies region.
  • Las Vegas McCarran International Airport: Key west coast hub providing around 150 daily departures.
  • Phoenix Sky Harbor International Airport: Southwest’s Arizona hub operates approximately 120 daily departures.
  • Nashville International Airport: Serves as smaller but strategic hub in Southeast with around 55 flights per day.

Southwest strategically locates its hubs across the U.S. to facilitate domestic connections. The carrier is focused heavily on point-to-point service but hubs allow linking its routes together.

Is Houston a Hub Airport for Delta?

Yes, Delta Air Lines operates a domestic connecting hub at George Bush Intercontinental Airport in Houston, Texas.

While not as large as rival United’s international mega-hub in Houston, Delta has maintained a significant connecting hub presence at Bush Intercontinental for over 30 years following its merger with Texas-based Braniff Airways in the 1980s.

Some key facts about Delta’s Houston Bush Intercontinental hub:

  • Serves approximately 50 major domestic Delta destinations nonstop including major hubs Atlanta, Detroit, Minneapolis/St. Paul and key markets like Orlando, Raleigh-Durham and Cincinnati.
  • Offers flights to about a dozen international destinations in Mexico, Central America, and northern South America.
  • Handles over 100,000 passengers per day during peak travel periods.
  • Accommodates over 20 million passengers annually including local Houston-area flyers and connecting passengers.
  • Operates around 160 daily departures from around 18 gates leased in Terminals D and E.
  • Employs over 3,000 Delta workers locally in Houston.

So in summary, while not Delta’s largest or most strategic connecting hub, Houston Bush Intercontinental does serve as an important domestic hub within Delta’s route network, focused primarily on linking Texas markets to other southern and eastern U.S. cities. It provides Delta with a competitive presence in the important Houston market against rivals like United.

What is United Airlines’ Main International Hub Airport?

United Airlines operates its largest and most important international hub gateway at George Bush Intercontinental Airport in Houston, Texas.

Bush Intercontinental serves as United’s premier international connecting hub facility, linking its expansive domestic U.S. network with destinations across the world.

Here are some details on United’s massive Houston international hub:

  • Serves as the largest hub in United’s global network with over 700 daily departures.
  • Offers nonstop flights to over 55 international destinations.
  • Connects passengers to every inhabited continent across the globe.
  • Key intercontinental routes include London, Frankfurt, Tokyo, Sydney, Sao Paulo and Delhi.
  • Massive gateway hub to Latin America with flights to over 30 destinations including Buenos Aires, Lima, Mexico City, Bogotá and Panama City.
  • Main Asian gateway hub connects to Tokyo Narita, Singapore, Hong Kong, Seoul and Shanghai.
  • Serves as vital connecting point between domestic U.S. flights and international destinations.
  • Handles over 11 million international passengers annually.
  • Employs around 17,000 United workers at Bush Intercontinental Airport.
  • Maintains customs and immigration facilities to process international passengers.

In addition to Houston, United has other smaller international hubs in Guam, Tokyo and its Chicago-O’Hare base. But Houston Bush undoubtedly serves as United’s largest and most important international hub, providing vast global connecting complex. It allows United to competitively serve intercontinental markets from its interior U.S. route network.

Key Takeaways: Which Airlines Have Houston Hubs?

  • United Airlines operates a huge international connecting hub at George Bush Intercontinental Airport.
  • Southwest Airlines maintains a major domestic hub at Houston Hobby Airport.
  • Delta Air Lines has a mid-sized domestic hub at Bush Intercontinental as well.
  • Houston provides important access to a massive local passenger base.
  • The city has a convenient geographic location to link connecting flights.
  • Hubs allow airlines to serve Houston and cities across the U.S., Latin America, Europe and Asia.
  • Houston has excellent airport facilities that enable hub operations to thrive.


In summary, Houston is a critical hub city for United, Southwest and Delta thanks to its strategic advantages like a large local population, high travel demand, business-friendly environment, and world-class airports.

United utilizes Houston as its largest international gateway hub to link its massive U.S. network with Latin America, Europe, and Asia. Meanwhile, Southwest dominates Hobby Airport with a major domestic hub serving cities across the country. Delta maintains a smaller but important domestic hub at Bush Airport as well.

Having hub airports in Houston allows these major carriers to effectively serve the Houston metro area while also facilitating connections between various domestic and global markets through their networks. The scale and scope of operations from Houston hubs underscore the city’s importance as a strategic base supporting the route systems of several leading airlines.

So when looking at which airlines have hubs in Houston, the standouts are clearly United, Southwest and Delta – making Houston one of the nation’s most prominent and well-connected airline hub cities.