# Distance from Onslow Airport (ONS) to Seattle (SEA)

> 14,191 km · estimated flight time 18h · Ultra-long-haul route.

## Summary

- **Distance**: 14,191 km / 8,818 mi / 7,662 nm
- **Estimated flight time**: 18h
- **Heading**: 46° (northeast)
- **Return heading**: 279° (west)
- **Classification**: Ultra-long-haul
- **Type**: International (Australia) → United States
- **Intercontinental**: Oceania → North America
- **Time difference**: -15h (When it's 04:31 in Onslow Airport, it's 13:31 in Seattle)
- **Elevation difference**: 425 ft (SEA is higher than ONS)

## Airports

### [Onslow Airport (ONS)](https://www.flightduration.online/airport/ons-onslow-airport/1ef266e0-162b-669c-86a6-06bb2780ed98)

- City: Onslow Airport, Australia
- ICAO: YOLW
- Timezone: Australia/Perth
- Coordinates: -21.670000, 115.110000
- Elevation: 7 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 04:31 in Onslow Airport, it's 13:31 in Seattle.
With a 15-hour time difference, expect significant jet lag.

## Related

- [Onslow Airport (ONS)](https://www.flightduration.online/airport/ons-onslow-airport/1ef266e0-162b-669c-86a6-06bb2780ed98)
- [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)