Before a flight out of George Bush Intercontinental Airport (IAH), the highest-value moves are a proper meal at a terminal restaurant, duty-free or spa time if the schedule allows, and clearing security with the right buffer — 3 hours before international departures, 2 hours before domestic. All five terminals connect airside, so you can cross between them and reach the on-airport Marriott on the underground people-mover without ever exiting security. Downtown Houston sits 21.9 miles from the terminal loop, about 34 minutes away in light traffic, and door-to-door shuttle service runs 24 hours a day to cover that drive for you.
What to do at IAH: the short answer
IAH has five terminals — A, B, C, D and E — connected airside, so everything below is reachable from any gate. Build your pre-flight time around these:
- Eat at a real restaurant. Pappadeaux Seafood Kitchen anchors Terminal E, Hugo's Cocina and Tequila Bar covers Tex-Mex in Terminal D, and Blaze Pizza handles quick meals in Terminal A.
- Order ahead with the Grab app. It lets you order meals ahead and skip the line at Starbucks, Chick-fil-A, McDonald's and other spots scattered across the terminals.
- Shop. Duty-free shops sit in the international terminals, with retailers like Tumi and Michael Kors for last-minute purchases.
- Reset. XpresSpa locations in Terminals C and D work well when a layover drags.
- Time your arrival. Three hours before international flights, two before domestic — and pad that if you land in the 6 to 9 a.m. or 4 to 7 p.m. check-in rush.
For the ground leg, a door-to-door airport shuttle prices as a flat quote for the whole vehicle, runs 24 hours a day, 365 days a year, and drivers help load and unload bags at the curb.
Terminals A-E: where you are and what's there
Which terminal you fly from shapes where you eat, shop and how far you walk. Here is the layout:
- Terminal A serves domestic flights with carriers like American and Delta. Blaze Pizza is the food anchor here.
- Terminal B handles United Express regional flights, so check your gate assignment early if United booked you onto a regional connection.
- Terminal C is United's main domestic terminal and home to one of the two XpresSpa locations.
- Terminal D hosts international carriers like Lufthansa, Air France and Emirates, with Hugo's Cocina and Tequila Bar, duty-free and the second XpresSpa.
- Terminal E handles United's international operations alongside the larger global carriers and anchors Pappadeaux Seafood Kitchen.
Terminal assignment matters less here than at most large airports because everything connects airside. A Pappadeaux dinner in Terminal E or a spa stop in Terminal C is reachable from any gate without re-clearing security, and the underground people-mover links the on-airport Marriott into the same complex — a genuine option on a same-day layover. For a broader walkthrough of both Houston airports, see our Houston airports traveler guide.
Eat, shop and unwind before the flight
Eat. Pappadeaux Seafood Kitchen in Terminal E is the sit-down anchor and worth planning around. Hugo's Cocina and Tequila Bar in Terminal D covers Tex-Mex before international departures. Blaze Pizza in Terminal A is the fast, predictable option. Starbucks, Chick-fil-A and McDonald's are scattered across the terminals for coffee and standard quick food. Download the Grab app before you travel: it lets you order meals ahead and skip the line, which pays off most when departures stack up in the 4 to 7 p.m. window.
Shop. Duty-free shops sit in the international terminals, and retailers like Tumi and Michael Kors cover last-minute purchases — a forgotten bag or a gift, handled without leaving the concourse.
Unwind. XpresSpa locations in Terminals C and D give you a pre-flight reset on the same side of security as your gate. If the layover runs long, the underground people-mover reaches the on-airport Marriott without exiting the terminal complex.
Timing, security and getting to the curb
Plan on 3 hours before international flights and 2 hours before domestic departures. The heaviest check-in windows run 6 to 9 a.m. and 4 to 7 p.m.; if your departure falls in either block, treat that buffer as a floor, not a target. TSA PreCheck and CLEAR lanes operate at IAH security checkpoints, so enrolled travelers can move through faster — worth using if you carry either credential.
On the arrival side, international travelers move through customs at IAH, where Global Entry and the Mobile Passport app shorten the wait. If someone is collecting you, ground pickup is timed to the flight: the driver tracks it and normally arrives 30 minutes after a domestic landing or 45 minutes after an international landing, adjusted automatically for delays.
Getting to the airport, a routing run measured on September 21, 2026 put downtown Houston to the IAH terminal loop at 21.9 miles and about 34 minutes in light traffic. Cruise-bound travelers driving the other direction can start with the Galveston to IAH shuttle guide. Driving yourself means parking plus that drive twice. A shuttle prices as a flat quote for the whole vehicle — vans seat up to 14 passengers, so a group splits one number — and drivers arrive 5 to 10 minutes early and help load and unload bags at the curb. Among completed IAH-to-central-Houston shuttle rides on record, typical fares run from about $67 at the low end to roughly $124 at the upper end, with a median near $85 across 21-to-30-mile city runs. Booking the round trip together saves 10%.