Houston Airport Terminals: A Complete Guide to IAH Terminals

Last Updated on Jul 28th, 2026 by Neha Sharma, Leave a Comment

George Bush Intercontinental Airport (IAH) is the main airport serving Houston and is one of the largest airports in terms of both domestic and international flights. It is located about 23 miles from Houston’s downtown area. IAH is the second-largest airline hub for United Airlines and serves 40 million passengers per year. There are five passenger terminals at this airport: A, B, C, D, and E.

Houston Airport Terminals at a Glance

Terminal A at Houston Airport

Terminal A handles most non-United domestic carriers and flights from Canada. Airlines operating from Terminal A include Air Canada, Alaska Airlines, American Airlines, Delta Air Lines, Frontier, JetBlue, and Spirit. WestJet also operates from this terminal.

Passengers will find standard amenities throughout Terminal A, including dining options, coffee shops, retail stores, and charging stations. The terminal has been part of ongoing improvements across the airport, with updated flooring and wayfinding systems installed in recent years.

Terminal B at Houston Airport

Terminal B primarily serves United Express regional flights. It is currently undergoing a major $2.5 billion transformation project scheduled for completion in fall 2026. The new Terminal B will feature 22 gates, a 54,000-square-foot United Club, sensory room facilities, and modern concession space.

During construction, travelers should expect some temporary layout changes and follow airport signage for gate assignments. United Express flights continue to operate from this terminal.

Terminal C at Houston Airport

Terminal C serves as United Airlines’ primary domestic hub at IAH. United operates exclusively from this terminal, handling a significant volume of domestic flights across the United States.

The terminal includes typical passenger services, dining, and retail options suitable for connecting passengers. United operates multiple gates and check-in facilities here. For travelers connecting between Terminal C and other terminals, the Skyway and Subway trains provide convenient movement.

Terminal D at Houston Airport

Terminal D functions as the primary international terminal for non-United carriers. Airlines operating from Terminal D include Aeromexico, Air France, British Airways, Emirates, EVA Air, KLM, Lufthansa, Qatar Airways, Singapore Airlines, Turkish Airlines, and Volaris.

This terminal handles international arrivals and departures, with full customs and immigration facilities. International passengers arriving at Terminal D proceed through Customs and Border Protection processing. Recent modernization projects have improved the passenger experience at Terminal D, including new ticketing lobby spaces.

Terminal E at Houston Airport

Terminal E handles United Airlines’ international flights. United operates long-haul routes from this terminal to destinations across Europe, Asia, and Latin America. The terminal features premium lounges, duty-free shopping, and complete customs facilities for arriving international passengers.

The new Terminal E Ticketing Lobby opened recently as part of the International Central Processor project, providing a more modern and efficient check-in experience.

Houston Airport Terminal Map

All five terminals at IAH are connected by two train systems. The Skyway is an above-ground automated people-mover that is accessible after security & connects terminals post-security for connecting passengers. The Subway is an underground train running pre-security, connecting all terminals and the Houston Airport Marriott. Some terminals also have walking connections available. 

Houston Airport Airlines by Terminal

Transportation Between Houston Airport Terminals

The Skyway is an above-ground link connecting all terminals beyond the security screening point. It provides a frequent service and is the fastest way for those who have connecting flights.

The subway links the terminals pre-security and also takes passengers to the Houston Airport Marriott. The underground train can be helpful to those who need to get between the terminals pre-security or hotel transfers.

There are pedestrian walkways linking certain terminals, especially C, D & E.

Houston Airport Parking Options

IAH provides the following types of parking:

• Terminal Parking: Situated next to each terminal
• Economy Parking: Affordable parking lots with a shuttle to the terminals
• Valet Parking: Provided at selected terminal sites

Currently used parking includes more efficient reservation and guidance systems. Passengers can view availability in real time using the Houston Airports app.

Facilities Available at Houston Airport Terminals

Passenger services at IAH include the following:

• Wi-Fi availability with Wi-Fi 6 at all terminals
• Charging points at all seats of the terminals
• Restaurants and coffee shops in all terminals
• Airline lounges like United Clubs and airline lounges for international airlines
• Restrooms for families and nurseries
• Wheelchair assistance and other accessibility services
• Currency exchange in international terminals
• Automatic teller machines in all terminals

You can find flight status, terminal maps, and parking details through the Houston Airports app.

Tips for Navigating Houston Airport Terminals

• Ensure that you are familiar with your terminal before arriving at the airport. Each airline has its own terminal, with United Airways flying out of terminals C and E.
• Be prepared for an additional delay with connecting to international destinations. This is because international departures take place from terminals D & E, and you will need to make use of the Skyway system or train.
• Install the mobile app of Houston Airports for information on flight statuses & maps.
• If your connection is via Terminal B, be aware that there is currently ongoing remodeling of this terminal until 2026.
• Take the Skyway for connections within the airside area post-security clearance.

Direct and Connecting Routes from Houston to India 

• Houston to India Flights
• Houston to Ahmedabad Flights
• Houston to Bangalore Flights
• Houston to Chennai Flights
• Houston to Delhi Flights
• Houston to Hyderabad Flights
• Houston to Kolkata Flights
• Houston to Mumbai Flights
• Houston to Pune Flights

Conclusion

George Bush Intercontinental Airport’s five terminals serve distinct purposes across domestic, regional, and international operations. Terminal A handles non-United domestic carriers, Terminal B serves United Express regional flights, Terminal C operates United’s domestic hub, Terminal D processes non-United international flights, and Terminal E handles United international services. 

The Skyway and the subway trains join all the terminals and make transfers easy for connections. It will be helpful to check the terminal allocation before coming to the airport.

Frequently Asked Questions

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Neha Sharma, a passionate travel blogger with more than 2 years and 6 months of experience, captures the beauty of the world through her words. With her adventurous spirit and a keen eye for detail, Neha takes her readers on mesmerizing journeys to exotic destinations. Her vivid descriptions and insightful tips make her the go-to guide for wanderlust seekers. Join Neha as she explores the globe, sharing her love for travel and inspiring others to go on their unforgettable adventures.