IAH Houston Airport Guide: Everything You Need to Know

Quick Overview of Houston IAH

George Bush Intercontinental Airport (IAH) is Houston's main airport and one of United Airlines' biggest hubs. It sits about 23 miles north of downtown Houston. With five terminals and over 130 gates, it's a sprawling complex, but two automated train systems make getting around easier than you'd expect.

IAH is a major gateway for flights to Latin America and the Caribbean, and United operates a massive international operation here. About 45 million passengers pass through annually.

Terminal Breakdown

Terminal A

Terminal A handles non-United domestic and some international flights. You'll find airlines like Southwest (limited), Spirit, Frontier, and several international carriers here. It connects to the Skyway and Subway systems for easy transfers to other terminals.

Terminal B

Terminal B handles United Express regional operations. Important note: The Terminal B lobby is closed for a major renovation and is expected to remain closed until late 2026. If you're flying out of Terminal B, you'll check in, drop bags, and clear TSA in Terminal C, then take the Skyway to your Terminal B gate. Plan extra time for this.

Terminal C

Terminal C is United's primary domestic terminal and the busiest at IAH. This is where you'll find the most dining options, shopping, and amenities. United has invested heavily here with upgraded dining concepts from local Houston chefs.

Terminal D

Terminal D is the international terminal. If you're arriving on an international flight, you'll clear customs here before connecting to your domestic gate. It has a solid selection of lounges and quiet spots.

Terminal E

Terminal E handles United international departures and some international arrivals. The United Polaris Lounge is here, making it the premium terminal for long-haul travelers.

Getting Between Terminals

IAH has two train systems, and understanding the difference is key to smooth connections.

The Skyway (Airside, Inside Security)

The Skyway runs above ground and connects Terminals A, B, C, and D/E while keeping you inside security. Trains depart every two minutes, and the full ride from Terminal A to Terminal D/E takes about 4 minutes and 15 seconds. This is the one you want for connections, since you won't need to re-clear security.

The Subway (Landside, Outside Security)

The Subway runs underground and connects all terminals plus the Airport Marriott hotel. It operates outside security, so you'll need to go through TSA again at your destination terminal. Trains depart every three minutes and run from 3:30 AM to 12:30 AM daily. It's free.

If both your flights are at IAH, always use the Skyway to avoid re-clearing security. Use the Subway only if you need to leave the secure area (hotel, rental cars, ground transportation).

Getting to Downtown Houston

METRO Bus Route 102

The cheapest option. METRO bus route 102 runs between IAH and downtown Houston. It takes about 60-90 minutes depending on traffic and costs a few dollars.

Route 500 IAH Downtown Direct

This is a newer nonstop bus service connecting downtown Houston to Terminal C. It runs daily from 5:30 AM to 8 PM with 30-minute intervals. Much faster than the local bus and still affordable.

Taxi and Rideshare

Taxis are available outside baggage claim in Terminals A, B, C, and E. Expect to pay $45-65 to downtown, depending on traffic. Uber and Lyft pickups are at designated areas. During rush hour, the drive can take over an hour.

Rental Cars

The rental car center is accessible via the Subway train. All major companies are available.

Airport Lounges

IAH has an impressive 13 lounges spread across the terminals. Here are the highlights:

Terminal C

• Amex Centurion Lounge - One of the best in the system. Chef-curated food, premium drinks, and a relaxing atmosphere. Access with Amex Platinum or Centurion cards.
• United Club - Multiple locations throughout Terminal C

Terminal D

• KLM Crown Lounge - Available for SkyTeam business class passengers
• Turkish Airlines Lounge - Excellent food, accessible for Turkish Airlines business class

Terminal E

• United Polaris Lounge - The crown jewel. Available to United international business and first class passengers. Full dining service, showers, daybeds, and a premium bar. One of the best airline lounges in the country.
• United Club - Standard United lounge amenities

Priority Pass holders have access to several third-party lounges across the terminals.

Food and Dining

IAH has seriously stepped up its food game. Houston's food scene is one of the best in the country, and the airport now reflects that.

Terminal A

• The Breakfast Klub - The iconic Midtown Houston restaurant brought to the airport. Soul food breakfast served all day with an express counter for quick grabs.

Terminal C

• Ember - Texas tavern with a wood-burning grill. Regional flavors done right.
• Pala - Neapolitan-style pizza from Chef Ryan Pera of Coltivare. Legit pizza for an airport.
• Hubcap Grill - Fresh-ground burgers and hand-cut fries. The Hubcap Decker is the move.

Terminal D

• Hugo's - James Beard Award-winning chef Hugo Ortega's Mexican restaurant. Tortas, tacos, and coctel de camaron.

Terminal E

• Q Bar - Real Texas BBQ smoked on-premise. Brisket, ribs, and Texas sausage.
• Gavi - House-made pizza, pasta, and antipasti in a patio-style setting.
• Pappadeaux Seafood Kitchen - The highest-rated restaurant at IAH. Houston seafood institution.

If you only have time for one meal, head to Terminal C or E for the best options.

WiFi

Free WiFi is available in all terminals. Just connect to the airport network and accept the terms. Charging stations and USB ports are plentiful throughout, with Terminal C having the most consistent availability.

Sleeping at IAH

Minute Suites (Terminal C)

Located near Gate C14, Minute Suites offers private rooms with a daybed that sleeps two, fresh pillows and blankets, a smart TV, free WiFi, and an Amazon Alexa sound-masking system. Rates are $65 per hour or $215 for an overnight stay of eight hours (after 9:00 PM). This is the best option at IAH if you need real sleep.

Free Sleeping Spots

• Terminal D, near Gates D1-3 and D5 - Quieter carpeted areas that work well for napping during late hours
• Terminal C - Some quieter corners near less-used gates, but it's generally busier

Nearby Hotels

The Houston Airport Marriott is connected via the Subway train. It's the most convenient option for overnight stays, and you can get there without leaving the airport complex.

Layover Tips

• Short layover (1-2 hours): Use the Skyway to get to your connecting gate. Grab food near your gate. Don't leave security.
• Medium layover (3-5 hours): Visit the Centurion Lounge in Terminal C if you have access. Otherwise, explore Terminal C or E's dining scene. The Skyway makes terminal-hopping easy and quick.
• Long layover (6+ hours): Book a Minute Suite for a nap. If you want to leave the airport, the Route 500 bus can get you downtown, but give yourself at least 3 hours for the round trip plus security.
• Overnight layover: Minute Suites overnight rate ($215) or the Airport Marriott are your best bets. If sleeping free, head to Terminal D's quiet gates.

Construction Updates

IAH is undergoing a major Terminal Redevelopment Program. The Terminal B lobby is closed and expected to reopen in late 2026. All Terminal B passengers check in and clear security at Terminal C, then use the Skyway to reach Terminal B gates. Budget an extra 15-20 minutes for this detour.

Pro Tips

• IAH is spread out. A minimum connection time of 90 minutes is wise, especially if switching terminals.
• The Skyway is significantly faster than the Subway for connections. Always use it when staying inside security.
• Terminal C has the best overall amenities for non-lounge travelers.
• If you're driving, the Terminal E garage is often less crowded than other garages.
• Houston's humidity hits you the moment you step outside. If you're heading into the city during summer, be prepared.

Frequently Asked Questions