# Distance from Hat Yai (HDY) to St Louis (STL)

> 14,816 km · estimated flight time 18h · Ultra-long-haul route.

## Summary

- **Distance**: 14,816 km / 9,206 mi / 8,000 nm
- **Estimated flight time**: 18h
- **Heading**: 12° (north northeast)
- **Return heading**: 345° (north northwest)
- **Classification**: Ultra-long-haul
- **Type**: International (Thailand) → United States
- **Intercontinental**: Asia → North America
- **Time difference**: -12h (When it's 23:40 in Hat Yai, it's 11:40 in St Louis)
- **Elevation difference**: 527 ft (STL is higher than HDY)

## Airports

### [Hat Yai International Airport (HDY)](https://www.flightduration.online/airport/hdy-hat-yai-hat-yai-international-airport/1ef266df-f5b3-6e28-88c1-06bb2780ed98)

- City: Hat Yai, Thailand
- ICAO: VTSS
- Timezone: Asia/Bangkok
- Coordinates: 6.930000, 100.390000
- Elevation: 90 ft

### [St Louis Lambert International Airport (STL)](https://www.flightduration.online/airport/stl-st-louis-st-louis-lambert-international-airport/1ef266df-39ab-67da-9abe-06bb2780ed98)

- City: St Louis, United States
- ICAO: KSTL
- Timezone: America/Chicago
- Coordinates: 38.750000, -90.370000
- Elevation: 617 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 23:40 in Hat Yai, it's 11:40 in St Louis.
With a 12-hour time difference, expect significant jet lag.

## Related

- [Hat Yai International Airport (HDY)](https://www.flightduration.online/airport/hdy-hat-yai-hat-yai-international-airport/1ef266df-f5b3-6e28-88c1-06bb2780ed98)
- [St Louis Lambert International Airport (STL)](https://www.flightduration.online/airport/stl-st-louis-st-louis-lambert-international-airport/1ef266df-39ab-67da-9abe-06bb2780ed98)
- [Flight duration calculator](/#calculator)