George Bush Intercontinental Airport uses the three-letter airport code IAH. At first glance, the code does not appear to match the airport’s current name. So, why is Houston airport called IAH?The answer goes back to the airport’s original name. George Bush Intercontinental Airport opened in 1969 as Houston Intercontinental Airport, and its IAH code was already associated with the airport before it was renamed in honor of former U.S. President George H. W. Bush in 1997.
Today, IAH is one of Houston’s most important transportation hubs. Houston Airports reported that IAH handled about 48 million passengers in 2025, while the broader Houston airport system served 62.1 million passengers.
What Does IAH Stand For?
The simplest explanation is that IAH comes from the airport’s former identity as Houston Intercontinental Airport.
The airport opened in June 1969 as Houston Intercontinental Airport. The airport code IAH was established while the facility was known by that name. The code therefore did not need to change when the airport received its new presidential namesake decades later.This is why travelers see a combination that can initially seem unusual:
- Current name: George Bush Intercontinental Airport
- City: Houston, Texas
- IATA code: IAH
- ICAO code: KIAH
- Former name: Houston Intercontinental Airport
- Opened: 1969
The Federal Aviation Administration also lists Houston George Bush Intercontinental Airport under the identifier IAH.
Why Isn’t Houston Airport Called HOU?
This is where the confusion becomes even more understandable.
Houston has more than one major commercial airport. The city’s airport system includes George Bush Intercontinental Airport (IAH) and William P. Hobby Airport (HOU), along with Ellington Airport.
Because Hobby Airport already uses HOU, Houston’s larger northern airport does not use HOU.In other words:
HOU = William P. Hobby Airport
IAH = George Bush Intercontinental Airport
The two codes allow airlines, airports, travel websites and reservation systems to distinguish between Houston’s different airports.
Why Doesn’t IAH Use “GBI” or “GBH”?
Another common question is why the airport didn’t receive a code based on the name George Bush Intercontinental Airport after the 1997 renaming.The reason is simple: the airport already had an established aviation identity.
Houston Intercontinental Airport had operated under the IAH designation for decades before the name change. Houston Airports’ official history states that the airport was renamed in 1997 to honor George H. W. Bush, the 41st president of the United States.
Changing the airport’s public name did not require replacing its established three-letter identifier.This is fairly common in aviation. Airport codes can remain in use even when airport names change.
When Did Houston Airport Become George Bush Intercontinental?
The airport opened in 1969 as Houston Intercontinental Airport.For many years, it simply served as Houston’s principal intercontinental airport. As Houston’s population, economy and international connections grew, the airport became increasingly important to the region.
In 1997, Houston City Council renamed the facility George Bush Intercontinental Airport in honor of George H. W. Bush.
Houston Airports’ official historical timeline records the 1997 renaming.Importantly, the IAH airport code stayed with the airport.
That explains why today’s airport has a presidential name but an older-looking three-letter code.
Who Was George H. W. Bush?
George H. W. Bush was the 41st president of the United States, serving from 1989 to 1993.
He also had a strong connection to Texas and Houston. Naming the airport after him gave the facility a direct connection to one of the country’s most prominent political figures and a former president.
The airport’s official name today is George Bush Intercontinental Airport, although many travelers simply call it “IAH” or “Bush Airport.”The Houston Airport System continues to identify the facility officially as George Bush Intercontinental Airport (IAH).
IAH vs. HOU: What’s the Difference?
If you’re flying to Houston, understanding the two airport codes is important.
IAH — George Bush Intercontinental Airport
IAH is located approximately 22 to 23 miles north of downtown Houston. It is Houston’s primary international airport and handles a large number of domestic and international routes.
Houston Airports says IAH had about 48 million passengers in 2025 and connected travelers with a large network of domestic and international destinations.
HOU — William P. Hobby Airport
HOU is located much closer to central Houston, approximately seven miles south of downtown.
Hobby Airport is particularly associated with Southwest Airlines and domestic travel, although it also offers international service. Houston Airports reported approximately 14 million passengers at HOU in 2025.
This distinction matters when booking hotels, arranging transportation or checking flight information.
A traveler who accidentally books a hotel near HOU while flying from IAH could find themselves much farther from the correct terminal than expected.
Why Is IAH Important to Houston?
IAH is more than just an airport with an unusual three-letter code.It serves as one of the major international gateways for Houston and the wider south-central United States. Houston Airports describes the city’s airport system as an important gateway to Latin America and international markets.
The airport is also a major hub for United Airlines, making it particularly important for passengers connecting through Houston to destinations throughout the United States and around the world.
In 2026, Houston Airports says its network connects travelers to more than 200 nonstop destinations across five continents through 29 airlines.
That makes the meaning of IAH relevant not only to Houston residents but also to millions of connecting passengers.
Is IAH the Official Airport Code?
Yes.
IAH is the IATA airport code for George Bush Intercontinental Airport.
The airport is also identified by the ICAO code KIAH. The FAA’s airport information identifies Houston George Bush Intercontinental as IAH.
For travelers, the IATA code is the one most commonly encountered when:
- Booking airline tickets
- Checking flight schedules
- Tracking flights
- Searching airport information
- Looking at baggage tags
- Checking departure and arrival boards
- Using travel apps
So when your airline ticket says IAH, it means you are traveling through George Bush Intercontinental Airport.
Does IAH Mean “International Airport Houston”?
You may see explanations online suggesting that IAH stands for something like “International Airport Houston” or “Intercontinental Airport Houston.”
The safest explanation is to connect the code with the airport’s original name, Houston Intercontinental Airport.
The airport was originally established as Houston Intercontinental Airport in 1969, and historical aviation references identify IAH with Houston Intercontinental Airport.The important point is that IAH was associated with the airport before the George Bush name was added.
Therefore, the code is not an abbreviation of “George Bush Intercontinental Airport.”
Why Do Airport Codes Sometimes Look Strange?
Three-letter airport codes are not always obvious abbreviations of the current airport name.Travelers encounter examples throughout the United States:
- Los Angeles International Airport — LAX
- Chicago O’Hare International Airport — ORD
- New York John F. Kennedy International Airport — JFK
- New Orleans Louis Armstrong International Airport — MSY
- Houston George Bush Intercontinental Airport — IAH
Airport codes can reflect historical airport names, previous locations, older identifiers or other aviation conventions.
That is why trying to guess an airport code from its current name does not always work.
What Is the Difference Between IATA and ICAO Codes?
Another source of confusion is that airports can have multiple identification systems.For ordinary travelers, the most familiar is the IATA three-letter code.For Houston’s George Bush Intercontinental Airport:
IATA: IAH
ICAO: KIAH
The IATA code is commonly displayed on airline tickets, baggage tags and consumer travel websites. The ICAO identifier is more commonly used in aviation operations and flight planning.The FAA also lists the Houston airport as IAH.
Where Is IAH Located?
George Bush Intercontinental Airport is located north of central Houston.
Houston Airports currently gives the airport’s location as approximately 22 miles north of downtown Houston, with access from major roads including Interstate 45, U.S. 59/I-69, the Hardy Toll Road and the Sam Houston Tollway.
The official airport address is:
George Bush Intercontinental Airport
2800 North Terminal Road
Houston, Texas 77032
Travelers should check their airline reservation carefully because Houston’s two major commercial airports use different codes.
The Short Answer: Why Is Houston Airport Called IAH?
So, why is Houston airport called IAH?
Because IAH is the established airport code inherited from Houston Intercontinental Airport, the name the facility had when it opened in 1969.
The airport was later renamed George Bush Intercontinental Airport in 1997, but its IAH identifier remained unchanged.
That is why a flight to George Bush Intercontinental Airport appears as IAH rather than something based on “George Bush.”
Frequently Asked Questions
What does IAH stand for?
IAH is the IATA code used by George Bush Intercontinental Airport in Houston. It is associated with the airport’s earlier name, Houston Intercontinental Airport.
Why is George Bush Airport called IAH?
The airport was originally Houston Intercontinental Airport when it opened in 1969. It was renamed after President George H. W. Bush in 1997, but the established IAH airport code remained.
Is IAH the same as Houston Airport?
IAH refers specifically to George Bush Intercontinental Airport. Houston also has William P. Hobby Airport, whose code is HOU.
Is IAH better than HOU?
Neither airport is universally “better.” The right choice depends on your airline, destination, flight schedule and location in Houston. IAH generally has a larger international network, while HOU is closer to downtown.
What is the airport code for George Bush Intercontinental Airport?
The IATA code is IAH and the ICAO code is KIAH.
Final Takeaway
The mystery behind IAH is really a piece of Houston aviation history.
George Bush Intercontinental Airport did not receive the name “George Bush” until 1997. It had already been operating for nearly three decades as Houston Intercontinental Airport. By keeping the established IAH identifier after the renaming, Houston avoided unnecessary disruption to an airport code already recognized by airlines, aviation systems and travelers.
So the next time you see IAH on a boarding pass, remember: you’re looking at a code that dates back to the airport’s original identity as Houston Intercontinental Airport.
Today, IAH remains one of Houston’s largest aviation gateways, handling roughly 48 million passengers in 2025 and connecting the region with destinations across the United States and the world.
In one sentence: IAH is used because George Bush Intercontinental Airport inherited the code from its original name, Houston Intercontinental Airport, long before it was renamed after George H. W. Bush.
