# Distance from St Louis (STL) to Ulan Bator (ULN)

> 10,238 km · estimated flight time 13h · Ultra-long-haul route.

## Summary

- **Distance**: 10,238 km / 6,362 mi / 5,528 nm
- **Estimated flight time**: 13h
- **Heading**: 349° (north northwest)
- **Return heading**: 13° (north northeast)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → Mongolia
- **Intercontinental**: North America → Asia
- **Time difference**: +13h (When it's 21:08 in St Louis, it's 10:08 in Ulan Bator)
- **Elevation difference**: 3,747 ft (ULN is higher 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

### [Buyant-Ukhaa International Airport (ULN)](https://www.flightduration.online/airport/uln-ulan-bator-buyant-ukhaa-international-airport/1ef266e0-1f91-688a-a773-06bb2780ed98)

- City: Ulan Bator, Mongolia
- ICAO: ZMUB
- Timezone: Asia/Ulaanbaatar
- Coordinates: 47.840000, 106.770000
- Elevation: 4,364 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 21:08 in St Louis, it's 10:08 in Ulan Bator.
With a 13-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)
- [Buyant-Ukhaa International Airport (ULN)](https://www.flightduration.online/airport/uln-ulan-bator-buyant-ukhaa-international-airport/1ef266e0-1f91-688a-a773-06bb2780ed98)
- [Flight duration calculator](/#calculator)