George Bush Intercontinental Airport (IATA: IAH, ICAO: KIAH, FAA LID: IAH) is the main international airport in Houston, Texas, United States, serving the Greater Houston metropolitan area. Initially named Houston Intercontinental Airport upon its opening in 1969, it was renamed in honor of George H. W. Bush, the 41st president of the United States and a resident of Houston, in 1997. It is also commonly called Houston International Airport or George Bush International Airport.

Located about 23 miles (37 km) north of Downtown Houston between Interstate 45 and Interstate 69/U.S. Highway 59 with direct access to the Hardy Toll Road expressway, George Bush Intercontinental Airport has scheduled flights to a large number of domestic and international destinations covering five continents. It is the second busiest airport in Texas for international passenger traffic as of 2025 (behind DFW) and has a number of international destinations, the second-busiest airport in Texas as of 2021 and the 15th busiest in the United States for total passenger traffic as of 2022.

IAH covers 10,000 acres (40 km²) of land and has five runways. Houston Intercontinental is one of the largest passenger hubs for United Airlines and formerly also served as a hub for defunct Continental Airlines and Texas International Airlines.

A group of Houston businessmen purchased the site for Bush Intercontinental Airport in 1957 to preserve it until the city of Houston could formulate a plan for a new airport as a replacement for William P. Hobby Airport (at the time known as Houston International Airport). The holding company for the land was named the Jet Era Ranch Corporation, but a typographical error transformed the words "Jet Era" into "Jetero" and the airport site subsequently became known as the Jetero airport site. Although the name Jetero was no longer used in official planning documents after 1961, the airport's eastern entrance was named Jetero Boulevard. Most of Jetero Boulevard was later renamed Will Clayton Parkway.

The City of Houston annexed the Intercontinental Airport area in 1965. This annexation, along with the 1965 annexations of the Bayport area, the Fondren Road area, and an area west of Sharpstown, resulted in a gain of 51,251 acres (20,741 ha) of land for the city limits.

Houston Intercontinental Airport, which was the original name for the airport, opened in June 1969. The airport's IATA code of IAH derived from the stylization of the airport's name as "Intercontinental Airport of Houston." All scheduled passenger airline service formerly operated from William P. Hobby Airport moved to Intercontinental upon the airport's completion. Hobby remained open as a general aviation airport and was once again used for scheduled passenger airline jet service two years later when Southwest Airlines initiated intrastate airline service nonstop between Hobby and Dallas Love Field in 1971.

In the late 1980s, Houston City Council considered a plan to rename the airport after Mickey Leland—an African-American U.S. Congressman who died in an aviation accident in Ethiopia. Instead of renaming the whole airport, the city named Mickey Leland International Arrivals Building, which would later become Mickey Leland Terminal D, after the congressman. In April 1997, Houston City Council unanimously voted to rename the airport George Bush Intercontinental Airport/Houston, after George H. W. Bush, the 41st president of the United States. The name change took effect on May 2, 1997.

On August 28, 1990, Continental Airlines agreed to build its maintenance center at George Bush Intercontinental Airport; Continental agreed to do so because the city of Houston agreed to provide city-owned land near the airport.