# Distance from Impfondo (ION) to Seattle (SEA)

> 13,342 km · estimated flight time 17h · Ultra-long-haul route.

## Summary

- **Distance**: 13,342 km / 8,291 mi / 7,204 nm
- **Estimated flight time**: 17h
- **Heading**: 330° (north northwest)
- **Return heading**: 47° (northeast)
- **Classification**: Ultra-long-haul
- **Type**: International (Congo) → United States
- **Intercontinental**: Africa → North America
- **Time difference**: -8h (When it's 07:49 in Impfondo, it's 23:49 in Seattle)
- **Elevation difference**: 667 ft (SEA 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

### [Seattle-Tacoma International Airport (SEA)](https://www.flightduration.online/airport/sea-seattle-seattle-tacoma-international-airport/1ef266df-37e8-64a2-a4f1-06bb2780ed98)

- City: Seattle, United States
- ICAO: KSEA
- Timezone: America/Los_Angeles
- Coordinates: 47.450000, -122.310000
- Elevation: 432 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 07:49 in Impfondo, it's 23:49 in Seattle.
With a 8-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)
- [Seattle-Tacoma International Airport (SEA)](https://www.flightduration.online/airport/sea-seattle-seattle-tacoma-international-airport/1ef266df-37e8-64a2-a4f1-06bb2780ed98)
- [Flight duration calculator](/#calculator)