# Distance from Houailou (HLU) to Seattle (SEA)

> 10,474 km · estimated flight time 13h · Ultra-long-haul route.

## Summary

- **Distance**: 10,474 km / 6,508 mi / 5,655 nm
- **Estimated flight time**: 13h
- **Heading**: 40° (northeast)
- **Return heading**: 243° (west southwest)
- **Classification**: Ultra-long-haul
- **Type**: International (New Caledonia) → United States
- **Intercontinental**: Oceania → North America
- **Time difference**: -18h (When it's 23:25 in Houailou, it's 05:25 in Seattle)
- **Elevation difference**: 422 ft (SEA is higher than HLU)

## Airports

### [Nesson Airport (HLU)](https://www.flightduration.online/airport/hlu-houailou-nesson-airport/1ef266df-7508-6c9c-9973-06bb2780ed98)

- City: Houailou, New Caledonia
- ICAO: NWWH
- Timezone: Pacific/Noumea
- Coordinates: -21.260000, 165.620000
- Elevation: 10 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 23:25 in Houailou, it's 05:25 in Seattle.
With a 18-hour time difference, expect significant jet lag.

## Related

- [Nesson Airport (HLU)](https://www.flightduration.online/airport/hlu-houailou-nesson-airport/1ef266df-7508-6c9c-9973-06bb2780ed98)
- [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)