# Distance from Ascension Island (ASI) to Houston (IAH)

> 9,589 km · estimated flight time 12h · Ultra-long-haul route.

## Summary

- **Distance**: 9,589 km / 5,958 mi / 5,178 nm
- **Estimated flight time**: 12h
- **Heading**: 301° (west northwest)
- **Return heading**: 101° (east southeast)
- **Classification**: Ultra-long-haul
- **Type**: International (SH) → United States
- **Time difference**: -5h (When it's 22:20 in Ascension Island, it's 17:20 in Houston)
- **Elevation difference**: 182 ft (IAH is lower than ASI)

## Airports

### [RAF Ascension Island (ASI)](https://www.flightduration.online/airport/asi-ascension-island-raf-ascension-island/1ef266de-d88a-637a-8b82-06bb2780ed98)

- City: Ascension Island, SH
- ICAO: FHAW
- Timezone: Atlantic/St_Helena
- Coordinates: -7.970000, -14.390000
- Elevation: 278 ft

### [George Bush Intcntl/Houston Airport (IAH)](https://www.flightduration.online/airport/iah-houston-george-bush-intcntlhouston-airport/1ef266df-22d4-6822-bae6-06bb2780ed98)

- City: Houston, United States
- ICAO: KIAH
- Timezone: America/Chicago
- Coordinates: 29.980000, -95.340000
- Elevation: 96 ft

## Route notes

This is an ultra-long-haul route, one of the longest in aviation. It requires wide-body aircraft with extended range capability such as the Airbus A350-900ULR or Boeing 777-200LR. Passengers should prepare for an extended flight with multiple meal services.

Time-zone information: When it's 22:20 in Ascension Island, it's 17:20 in Houston.
The 5-hour time difference may cause some jet lag.

## Related

- [RAF Ascension Island (ASI)](https://www.flightduration.online/airport/asi-ascension-island-raf-ascension-island/1ef266de-d88a-637a-8b82-06bb2780ed98)
- [George Bush Intcntl/Houston Airport (IAH)](https://www.flightduration.online/airport/iah-houston-george-bush-intcntlhouston-airport/1ef266df-22d4-6822-bae6-06bb2780ed98)
- [Flight duration calculator](/#calculator)