# Distance from St Louis (STL) to Ranong Airport (UNN)

> 14,539 km · estimated flight time 18h · Ultra-long-haul route.

## Summary

- **Distance**: 14,539 km / 9,034 mi / 7,851 nm
- **Estimated flight time**: 18h
- **Heading**: 348° (north northwest)
- **Return heading**: 9° (north)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → Thailand
- **Intercontinental**: North America → Asia
- **Time difference**: +12h (When it's 07:20 in St Louis, it's 19:20 in Ranong Airport)
- **Elevation difference**: 560 ft (UNN is lower than STL)

## Airports

### [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

### [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 07:20 in St Louis, it's 19:20 in Ranong Airport.
With a 12-hour time difference, expect significant jet lag.

## Related

- [St Louis Lambert International Airport (STL)](https://www.flightduration.online/airport/stl-st-louis-st-louis-lambert-international-airport/1ef266df-39ab-67da-9abe-06bb2780ed98)
- [Ranong Airport (UNN)](https://www.flightduration.online/airport/unn-ranong-airport/1ef266df-f5b0-6138-85ec-06bb2780ed98)
- [Flight duration calculator](/#calculator)