William P. Hobby Airport

William P. Hobby Airport carries the IATA code HOU — the three letters printed on boarding passes and baggage tags — and the ICAO code KHOU, used in flight plans and by air traffic control. It serves Houston, United States.

IATA codes are assigned by the International Air Transport Association for passenger-facing use; the four-letter ICAO code encodes region and country and belongs to the operational side of aviation.