# Distance from Impfondo (ION) to St Louis (STL)

> 11,479 km · estimated flight time 15h · Ultra-long-haul route.

## Summary

- **Distance**: 11,479 km / 7,133 mi / 6,198 nm
- **Estimated flight time**: 15h
- **Heading**: 311° (northwest)
- **Return heading**: 77° (east northeast)
- **Classification**: Ultra-long-haul
- **Type**: International (Congo) → United States
- **Intercontinental**: Africa → North America
- **Time difference**: -6h (When it's 13:50 in Impfondo, it's 07:50 in St Louis)
- **Elevation difference**: 482 ft (STL is lower than ION)

## Airports

### [Impfondo Airport (ION)](https://www.flightduration.online/airport/ion-impfondo-impfondo-airport/1ef266de-d690-615a-a20b-06bb2780ed98)

- City: Impfondo, Congo
- ICAO: FCOI
- Timezone: Africa/Brazzaville
- Coordinates: 1.620000, 18.070000
- Elevation: 1,099 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 13:50 in Impfondo, it's 07:50 in St Louis.
With a 6-hour time difference, expect significant jet lag.

## Related

- [Impfondo Airport (ION)](https://www.flightduration.online/airport/ion-impfondo-impfondo-airport/1ef266de-d690-615a-a20b-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)