George Bush Intercontinental Airport Houston (IATA: IAH, ICAO: KIAH) (for International Airport Houston) is 23 miles north of downtown Houston, Texas. It is located between Interstate 45 and Highway 59, inside the Houston city limits in the Aldine area, and is adjacent to Humble. It is frequently referred to as Houston Airport. With 30 destinations in Mexico, Bush Intercontinental offers service to more Mexican destinations than any other U.S. airport. Houston is also the headquarters of United Airlines, and Bush Intercontinental is United's largest hub, with 800 daily departures.