Question: is iah a big airport?
Answer: In 2019, the airport served 45,264,059 passengers, making it the 47th busiest airport in the world, and the 14th busiest airport in the United States. IAH covers 10,000 acres (40.5 km2.) of land and has five runways. Houston Intercontinental is the second largest passenger hub for United Airlines behind Chicago–O'Hare.