# Distance from Houston (IAH) to St Mary'S (KSM)

> 5,957 km · estimated flight time 8h · Long-haul route.

## Summary

- **Distance**: 5,957 km / 3,702 mi / 3,217 nm
- **Estimated flight time**: 8h
- **Heading**: 327° (north northwest)
- **Return heading**: 94° (east)
- **Classification**: Long-haul
- **Type**: Domestic (United States)
- **Time difference**: -3h (When it's 13:20 in Houston, it's 10:20 in St Mary'S)
- **Elevation difference**: 218 ft (KSM is higher 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

### [St Mary's Airport (KSM)](https://www.flightduration.online/airport/ksm-st-marys-st-marys-airport/1ef266df-8810-6b14-99ba-06bb2780ed98)

- City: St Mary'S, United States
- ICAO: PASM
- Timezone: America/Nome
- Coordinates: 62.060000, -163.300000
- Elevation: 314 ft

## Route notes

This is a long-haul route typically operated by wide-body aircraft such as the Boeing 777 or Airbus A350. Full meal service, in-flight entertainment, and comfort amenities are standard.

Time-zone information: When it's 13:20 in Houston, it's 10:20 in St Mary'S.
The 3-hour time difference may cause some 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)
- [St Mary's Airport (KSM)](https://www.flightduration.online/airport/ksm-st-marys-st-marys-airport/1ef266df-8810-6b14-99ba-06bb2780ed98)
- [Flight duration calculator](/#calculator)