# Distance from Dehradun (DED) to St Louis (STL)

> 12,258 km · estimated flight time 15h · Ultra-long-haul route.

## Summary

- **Distance**: 12,258 km / 7,617 mi / 6,619 nm
- **Estimated flight time**: 15h
- **Heading**: 351° (north)
- **Return heading**: 11° (north)
- **Classification**: Ultra-long-haul
- **Type**: International (India) → United States
- **Intercontinental**: Asia → North America
- **Time difference**: -10.5h (When it's 04:12 in Dehradun, it's 17:42 in St Louis)
- **Elevation difference**: 1,214 ft (STL is lower than DED)

## Airports

### [Dehradun Airport (DED)](https://www.flightduration.online/airport/ded-dehradun-dehradun-airport/1ef266df-f1fb-6664-aa1d-06bb2780ed98)

- City: Dehradun, India
- ICAO: VIDN
- Timezone: Asia/Kolkata
- Coordinates: 30.190000, 78.180000
- Elevation: 1,831 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 04:12 in Dehradun, it's 17:42 in St Louis.
With a 10.5-hour time difference, expect significant jet lag.

## Related

- [Dehradun Airport (DED)](https://www.flightduration.online/airport/ded-dehradun-dehradun-airport/1ef266df-f1fb-6664-aa1d-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)