# Distance from Houston (IAH) to Ranong Airport (UNN)

> 15,349 km · estimated flight time 19h · Ultra-long-haul route.

## Summary

- **Distance**: 15,349 km / 9,538 mi / 8,288 nm
- **Estimated flight time**: 19h
- **Heading**: 339° (north northwest)
- **Return heading**: 18° (north northeast)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → Thailand
- **Intercontinental**: North America → Asia
- **Time difference**: +12h (When it's 18:34 in Houston, it's 06:34 in Ranong Airport)
- **Elevation difference**: 39 ft (UNN is lower than IAH)

## Airports

### [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

### [Ranong Airport (UNN)](https://www.flightduration.online/airport/unn-ranong-airport/1ef266df-f5b0-6138-85ec-06bb2780ed98)

- City: Ranong Airport, Thailand
- ICAO: VTSR
- Timezone: Asia/Bangkok
- Coordinates: 9.780000, 98.590000
- Elevation: 57 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 18:34 in Houston, it's 06:34 in Ranong Airport.
With a 12-hour time difference, expect significant jet lag.

## Related

- [George Bush Intcntl/Houston Airport (IAH)](https://www.flightduration.online/airport/iah-houston-george-bush-intcntlhouston-airport/1ef266df-22d4-6822-bae6-06bb2780ed98)
- [Ranong Airport (UNN)](https://www.flightduration.online/airport/unn-ranong-airport/1ef266df-f5b0-6138-85ec-06bb2780ed98)
- [Flight duration calculator](/#calculator)