George Bush Intercontinental Airport (IAH) is United Airlines’ largest hub and Houston’s primary gateway for international travel, sitting about 23 miles north of downtown.
Five Terminals, One Train Underneath
IAH is split across five terminals, A through E, connected by an underground train so you can move between them without leaving security. Terminal E and parts of Terminal D handle most international arrivals, alongside domestic United flights.
Getting Downtown
METRO’s Park & Ride buses connect IAH to downtown, though most visitors rely on a taxi, rideshare, or rental car for the roughly 30 to 40 minute drive. All major rental car brands operate from an on-site consolidated rental car facility.
IAH vs. Hobby (HOU)
If your flight has a choice of Houston airport, IAH is the stronger pick for international connections and United’s route network, while Houston’s other airport, William P. Hobby (HOU), sits closer to downtown and is Southwest Airlines’ home base.
Search live fares into IAH above.