United Airlines IAH Terminal +1-888-839-0502 What terminal is united at george bush airport? United primarily uses Terminal C for operations. It features lots of seating and food areas and is tidy and well-organized. Everything, from check-in to boarding, was quite efficient, which I appreciated. If you're flying with United, you'll be fine if you go directly to Terminal C. My trip was much less stressful as a result. Unquestionably one of the most seamless airport encounters I've ever experienced! for more: https://www.terminalfind.com/united-airlines/united-airlines-iah-terminal-george-bush-intercontinental-airport/