What Time Is It at Houston George Bush Airport (IAH)?
- Time zone now
- Central Time, UTC−6 / UTC−5
- Zulu now
- UTC
- From you
- Sunrise / sunset
- Next clock change
- Location
- 29.984, -95.341
Houston George Bush (IAH) is on Central Time: UTC−6 (CST) in standard time and UTC−5 (CDT) while daylight saving time is on. The airport is in Houston, the United States. Its codes are IAH (IATA, the one on your boarding pass) and KIAH (ICAO, the one pilots and air traffic control use).
Other airports on the same clock: Dallas/Fort Worth (DFW), Chicago O'Hare (ORD), Minneapolis-St. Paul (MSP), Nashville (BNA), Austin-Bergstrom (AUS).
Zulu Time and IAH
To get local time from Zulu, subtract 6 hours in standard time. With daylight saving time on, to get local time from Zulu, subtract 5 hours. Going the other way, from local time to Zulu, do the opposite.
For example, a METAR or flight plan time of 1500Z is 9:00 a.m. local at IAH in standard time.
When the Clocks Change
Every daylight saving change at IAH from now through 2027, in local time. These come from the same international time zone database phones and computers use.
| Date | Local time | Change | New offset |
|---|---|---|---|
| Sunday, November 1, 2026 | 2:00 a.m. | Clocks go back 1 hour | UTC−6 |
| Sunday, March 14, 2027 | 2:00 a.m. | Clocks go forward 1 hour | UTC−5 |
| Sunday, November 7, 2027 | 2:00 a.m. | Clocks go back 1 hour | UTC−6 |
AvClock keeps IAH on your clock next to LOCAL and Zulu, with sunrise, sunset, weather, and airport details for any airport in the world. Free on iPhone, iPad, Mac, and Apple Watch.
Common Questions
What time zone is IAH airport in?
Houston George Bush Airport (IAH) uses the America/Chicago time zone, Central Time. That's UTC−6 in standard time and UTC−5 in daylight saving time.
Does IAH change its clocks for daylight saving time?
Yes. The next change is on Sunday, November 1, 2026.
How do I convert Zulu time to local time at IAH?
To get local time from Zulu, subtract 6 hours in standard time. With daylight saving time on, to get local time from Zulu, subtract 5 hours. Going the other way, from local time to Zulu, do the opposite.
Times here come from your browser's clock and the international time zone database. Sunrise and sunset are estimates, good to a few minutes. AvClock is for reference only, not for navigation or flight planning.