Houston Airport Terminal Guide 2026: IAH & HOU
Houston has two commercial airports. George Bush Intercontinental Airport has five terminals and is United Airlines' hub, while William P. Hobby Airport has one main terminal and is Southwest Airlines' Houston airport. IAH is 23 miles north of downtown. HOU is 9 miles southeast. Neither airport has direct rail service to downtown.
Houston has two commercial airports serving the metro area: George Bush Intercontinental Airport (IAH), the massive United Airlines hub 23 miles north of downtown, and William P. Hobby Airport (HOU), the Southwest Airlines stronghold 9 miles southeast of the city center. Knowing which one serves your destination — and which terminal you need — makes the difference between a smooth connection and a missed flight.
Flying in or out of Houston? Our Houston airport transfers and black car service in Houston pages cover vehicles, all-in pricing and how pickups work. Also in Houston: chauffeur service.
IAH vs HOU: Which Houston Airport?
The first decision every Houston traveler faces: IAH or HOU? They serve fundamentally different carriers and different parts of the metro.
| Factor | IAH (Bush Intercontinental) | HOU (Hobby Airport) |
|---|---|---|
| Full Name | George Bush Intercontinental | William P. Hobby Airport |
| IATA Code | IAH | HOU |
| Location | 23 miles north of Downtown | 9 miles southeast of Downtown |
| Primary Carrier | United Airlines (hub) | Southwest Airlines (hub) |
| Other Carriers | American, Delta, Spirit, Frontier + international | Delta, American (limited) |
| International Flights | Yes — Terminal E | Yes — International Terminal |
| Annual Passengers | ~43 million | ~16 million |
| Terminals | 5 terminals (A–E) | 1 main terminal + international |
| Nearest Rail | None (no direct rail) | METRORail Red Line (free bus connector) |
| Drive to Downtown | 25–45 min (traffic dependent) | 15–30 min |
| Drive to Galleria | 20–35 min | 25–40 min |
| Drive to Energy Corridor | 30–50 min | 35–55 min |
| Drive to The Woodlands | 20–35 min | 55–75 min |
| Best For | United flights, Energy Corridor, Woodlands, international | Southwest, Downtown, Medical Center, Pearland |
Which airlines use IAH Terminals A through E?
George Bush Intercontinental is a sprawling airport with five separate terminals connected by a free inter-terminal train called the IAH Skyway. Allow at least 15 minutes for inter-terminal connections and up to 25 minutes during peak hours.
Terminal A — United Domestic (West Concourse)
Terminal A handles United Airlines domestic flights on the west side of the airport. This is one of United's busiest domestic concourses, covering flights to Chicago O'Hare, Newark, Denver, Los Angeles, and dozens of other destinations. Terminal A also houses a United Club lounge on the upper level near Gates A11 and A28.
- United Airlines domestic flights
- United Club lounge (near Gates A11/A28)
- IAH Skyway connection to all terminals
- Ground transportation pick-up on Level 1
Terminal B — United Hub (Central Terminal)
Terminal B is the heart of United's Houston hub and the busiest terminal at IAH. It handles the highest volume of United domestic and select United Express regional flights. Terminal B connects directly to the Bush Intercontinental Marriott hotel — the only on-airport hotel, accessible via a sky bridge without going through security. If you have an early morning United flight, staying at the Marriott and walking to Terminal B is the smoothest possible start.
Pro Tip: On-Airport Hotel
The Bush Intercontinental Marriott connects directly to Terminal B via sky bridge. No shuttle, no security re-entry. Book here for 5 AM departures.
- United Airlines (primary domestic hub terminal)
- United Club lounge
- Marriott hotel sky bridge connection
- United Express (regional jets)
Terminal C — United Hub (East Domestic)
Terminal C is another major United domestic terminal at IAH, handling overflow from Terminals A and B as well as dedicated routes. The American Express Centurion Lounge at IAH is located in Terminal C, making it the premium lounge destination at the airport even for non-United travelers who hold the Amex Platinum card.
Centurion Lounge Location
The Amex Centurion Lounge is in Terminal C. If you arrive in another terminal, factor in 15 minutes on the Skyway train. Worth it for the Houston-inspired menu and shower suites.
- United Airlines domestic flights
- American Express Centurion Lounge (Level 3, post-security)
- United Club lounge
Terminal D — Non-United Domestic Carriers
Terminal D houses all the domestic carriers that aren't United. American Airlines, Delta Air Lines, Spirit Airlines, and Frontier Airlines all operate from Terminal D. If you're flying any non-United domestic airline at IAH, this is your terminal. Terminal D is smaller and generally less crowded than the United terminals, with shorter security lines during most hours.
| Airline | Terminal D Gates | Lounge |
|---|---|---|
| American Airlines | D2–D20 | Admirals Club (post-security) |
| Delta Air Lines | D21–D40 | Delta Sky Club (post-security) |
| Spirit Airlines | D1–D8 | None |
| Frontier Airlines | D1–D8 | None |
| Alaska Airlines | D2–D20 | None at IAH |
Terminal E — United International & Premium
Terminal E is where United's international and premium long-haul flights depart. This is the terminal for Polaris business class flights to London Heathrow, Frankfurt, Tokyo Narita, Mexico City, Lima, São Paulo, and dozens of other international destinations. The United Club lounge in Terminal E is larger and better-appointed than the domestic terminal lounges, with a dedicated Polaris lounge section for business class passengers.
Terminal E also handles several international carriers including Air Canada, Avianca, Copa Airlines, LATAM, and others operating to Latin America and Canada.
- United Airlines international flights (Polaris business class)
- United Club Lounge (largest at IAH)
- Air Canada, Avianca, Copa, LATAM, Aeromexico
- U.S. Customs and Border Protection for international arrivals
- IAH Skyway to all domestic terminals
How do you travel between IAH terminals?
The IAH Skyway is a free automated people mover connecting all five terminals. It operates 24 hours and runs every 3–5 minutes. The full loop from Terminal A to Terminal E takes approximately 10–12 minutes, but you'll typically only need 2–3 stops.
Skyway Route:
A → B → C → D → E → (loop back to A)
Accessible from Level 2 of each terminal. Follow "IAH Skyway" signs (brown signs with train icon).
Important: The Skyway does not exit to ground transportation. To reach your car service pickup, ride to your departure terminal, exit through baggage claim, and proceed to the Ground Transportation Level 1 curb.
Hobby Airport (HOU): Complete Guide
William P. Hobby Airport is Houston's compact, easy-to-navigate secondary airport. Where IAH sprawls across five terminals, HOU operates from a single main terminal with a dedicated international concourse added in 2015 to support Southwest Airlines' international expansion to Mexico, the Caribbean, and Central America.
HOU Terminal Layout
HOU's main terminal is organized around four concourses. Southwest Airlines dominates the facility, operating from Gates 1–52 across Concourses A, B, C, and D. The international terminal (Concourse E) handles Southwest's cross-border routes to Cancún, Nassau, Montego Bay, Punta Cana, and other leisure destinations.
| Concourse | Airlines | Notes |
|---|---|---|
| A | Southwest Airlines | Domestic — Gates A1–A10 |
| B | Southwest Airlines | Domestic — Gates B1–B16 |
| C | Southwest Airlines | Domestic + Delta — Gates C1–C12 |
| D | Southwest Airlines + American | Domestic — Gates D1–D14 |
| E (International) | Southwest Airlines | International terminal opened 2015 — Mexico, Caribbean, Central America |
HOU Ground Transportation
Unlike IAH, Hobby Airport is accessible by the Houston METRORail Red Line — though with a catch. There is no direct rail station at HOU. Instead, a free HOU Connector bus runs every 30 minutes from the airport to the Fannin South METRoRail Station, where you can board the Red Line north to Downtown Houston, the Texas Medical Center, and Hermann Park.
Total transit time from HOU to Downtown Houston via the connector bus + METRoRail: approximately 45–60 minutes. By car service, the same trip takes 20–35 minutes depending on traffic.
Warning: No Direct Rail to IAH
George Bush Intercontinental Airport has no light rail, commuter rail, or subway connection. The Houston METRORail does not serve IAH. The only ground transportation options from IAH are car service, taxi, rideshare (Uber/Lyft), or long-distance bus (limited service). For Houston business travelers arriving at IAH, pre-arranged IAH car service that meets you inside baggage claim is the only reliable, fixed-rate option.
Houston Corporate & Business Travel
Houston is one of America's most important corporate travel markets. The city's economy is anchored by the energy sector — ExxonMobil, Chevron, Shell, ConocoPhillips, Halliburton, Schlumberger, and hundreds of oil-field services companies maintain large presences here. The Texas Medical Center, the world's largest medical complex, draws executives and physicians from every continent. Understanding where your clients are located determines which airport and which route matters most. Pre-booked Houston car service adapts pickup and routing to whichever airport and business district your itinerary requires.
| Destination | From IAH | From HOU | Best Airport |
|---|---|---|---|
| Downtown Houston | 25–40 min | 20–30 min | HOU (closer) |
| Galleria / Uptown | 20–35 min | 25–40 min | IAH (slightly) |
| Energy Corridor (Katy Fwy) | 30–45 min | 40–55 min | IAH |
| The Woodlands | 20–30 min | 55–70 min | IAH (significantly) |
| Texas Medical Center | 30–45 min | 15–25 min | HOU (significantly) |
| NASA / Clear Lake | 40–55 min | 25–40 min | HOU |
| Sugar Land | 40–55 min | 30–45 min | HOU |
| Pearland | 40–55 min | 25–35 min | HOU |
| Katy | 35–50 min | 45–60 min | IAH |
| Conroe / Montgomery | 25–40 min | 60–80 min | IAH |
How much is car service from IAH and HOU to downtown?
Detailed Drivers provides flat-rate car service from both IAH and HOU to all major Houston destinations. Rates are all-inclusive — tolls, fuel surcharges, and meet-and-greet service inside baggage claim are included. There is no surge pricing.
| Destination | From IAH — Sedan | From IAH — SUV | From HOU — Sedan | From HOU — SUV |
|---|---|---|---|---|
| Downtown Houston | $250 all-in | $310 all-in | $180 all-in | $210 all-in |
All-in estimates: gratuity, tax and card processing included, rounded to the nearest $10.
Houston Traffic: What to Expect
Houston consistently ranks among the worst U.S. cities for traffic congestion. The city's highway system is vast but heavily used, and there is no comprehensive rail alternative for most commuters. Understanding Houston's traffic patterns is essential for airport scheduling.
Peak Traffic Hours
- Morning Rush: 7:00 AM – 9:30 AM (I-45, US-290, I-10)
- Evening Rush: 4:00 PM – 7:00 PM (all major highways)
- Worst Corridor: I-610 Loop and I-45 South
- Hardy Toll Road: Best IAH southbound alternative (avoid I-45 North)
- Beltway 8: Use for lateral moves between quadrants
Buffer Time Recommendations
- Off-peak from IAH: Allow 30 min to Downtown
- Peak from IAH: Allow 60 min to Downtown
- Rainstorm advisory: Add 20–30 min — Houston flooding
- Rodeo season (Feb–Mar): NRG Area exits congested
- Astros/Texans game days: Downtown gridlock 2 hrs post-game
Houston Flooding Warning
Houston is prone to flash flooding, especially during hurricane season (June–November) and winter storms. After Hurricane Harvey (2017), the city improved drainage, but significant rainfall can still close key roads including Brays Bayou crossings near the Medical Center and I-10 underpasses. Your Detailed Drivers chauffeur monitors real-time road conditions and will reroute proactively.
Houston Airport FAQs
Which Houston airport should I fly into — IAH or HOU?
Choose IAH for United flights, Energy Corridor business, The Woodlands, and international travel. Choose HOU for Southwest flights, Downtown, Texas Medical Center, and Pearland/Sugar Land destinations. HOU is also the better option if you're staying in Houston's inner loop neighborhoods.
Which terminal is United Airlines at IAH?
United operates from Terminals A, B, C, and E at IAH. Terminal B is the primary domestic hub, Terminal A handles additional domestic routes, Terminal C hosts the Centurion Lounge, and Terminal E handles international and Polaris business class flights. When in doubt, check your boarding pass for your specific terminal assignment.
Is there a train from IAH to downtown Houston?
No. IAH has no direct rail connection. The Houston METRORail does not serve IAH. Your only options are car service, taxi, rideshare, or bus. From HOU, a free connector bus links to the METRoRail Red Line at Fannin South.
How far is IAH from Downtown Houston?
IAH is approximately 23 miles north of Downtown Houston. The drive takes 25–45 minutes off-peak but can exceed 60 minutes during morning and evening rush hours. The Hardy Toll Road is the fastest route southbound from IAH.
Where does car service pick up at IAH?
Detailed Drivers meets passengers inside baggage claim at whichever terminal they arrive in. Your chauffeur holds a name sign and assists with luggage. Ground transportation curbside pickup is on Level 1 of each terminal. For Terminal E international arrivals, expect to clear customs before meeting your driver.
Is Southwest Airlines at IAH or HOU?
Southwest Airlines operates exclusively from Hobby Airport (HOU). Southwest does not fly from George Bush Intercontinental (IAH). If your flight is on Southwest, you'll use HOU — located 9 miles southeast of Downtown Houston.
How much does a car service from IAH to the Energy Corridor cost?
Detailed Drivers provides car service from IAH to the Energy Corridor with tolls, meet-and-greet and flight monitoring included. Call (888) 420-0177 for a route-specific engine quote.
What is the Centurion Lounge at IAH and where is it?
The American Express Centurion Lounge at IAH is located in Terminal C, post-security. Access requires an Amex Platinum, Centurion, or Business Platinum card. The lounge features a full bar, Texas-inspired hot food, shower suites, and high-speed Wi-Fi. If you arrive at a different terminal, take the Skyway to Terminal C.
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