# Distance from Koumac (KOC) to Seattle (SEA)

> 10,505 km · estimated flight time 13h · Ultra-long-haul route.

## Summary

- **Distance**: 10,505 km / 6,528 mi / 5,672 nm
- **Estimated flight time**: 13h
- **Heading**: 41° (northeast)
- **Return heading**: 244° (west southwest)
- **Classification**: Ultra-long-haul
- **Type**: International (New Caledonia) → United States
- **Intercontinental**: Oceania → North America
- **Time difference**: -18h (When it's 04:32 in Koumac, it's 10:32 in Seattle)
- **Elevation difference**: 390 ft (SEA is higher than KOC)

## Airports

### [Koumac Airport (KOC)](https://www.flightduration.online/airport/koc-koumac-koumac-airport/1ef266df-750c-66f8-93b6-06bb2780ed98)

- City: Koumac, New Caledonia
- ICAO: NWWK
- Timezone: Pacific/Noumea
- Coordinates: -20.550000, 164.260000
- Elevation: 42 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 04:32 in Koumac, it's 10:32 in Seattle.
With a 18-hour time difference, expect significant jet lag.

## Related

- [Koumac Airport (KOC)](https://www.flightduration.online/airport/koc-koumac-koumac-airport/1ef266df-750c-66f8-93b6-06bb2780ed98)
- [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)