# Distance from Dalanzadgad (DLZ) to St Louis (STL)

> 10,739 km · estimated flight time 14h · Ultra-long-haul route.

## Summary

- **Distance**: 10,739 km / 6,673 mi / 5,799 nm
- **Estimated flight time**: 14h
- **Heading**: 12° (north northeast)
- **Return heading**: 349° (north)
- **Classification**: Ultra-long-haul
- **Type**: International (Mongolia) → United States
- **Intercontinental**: Asia → North America
- **Time difference**: -13h (When it's 12:01 in Dalanzadgad, it's 23:01 in St Louis)
- **Elevation difference**: 4,170 ft (STL is lower than DLZ)

## Airports

### [Dalanzadgad Airport (DLZ)](https://www.flightduration.online/airport/dlz-dalanzadgad-dalanzadgad-airport/1ef266e0-1f77-61ba-9c8a-06bb2780ed98)

- City: Dalanzadgad, Mongolia
- ICAO: ZMDZ
- Timezone: Asia/Ulaanbaatar
- Coordinates: 43.590000, 104.430000
- Elevation: 4,787 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 12:01 in Dalanzadgad, it's 23:01 in St Louis.
With a 13-hour time difference, expect significant jet lag.

## Related

- [Dalanzadgad Airport (DLZ)](https://www.flightduration.online/airport/dlz-dalanzadgad-dalanzadgad-airport/1ef266e0-1f77-61ba-9c8a-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)