# Distance from Lock (LOC) to Seattle (SEA)

> 13,523 km · estimated flight time 17h · Ultra-long-haul route.

## Summary

- **Distance**: 13,523 km / 8,403 mi / 7,302 nm
- **Estimated flight time**: 17h
- **Heading**: 51° (northeast)
- **Return heading**: 253° (west southwest)
- **Classification**: Ultra-long-haul
- **Type**: International (Australia) → United States
- **Intercontinental**: Oceania → North America
- **Time difference**: -16.5h (When it's 20:48 in Lock, it's 04:18 in Seattle)
- **Elevation difference**: 82 ft (SEA is higher than LOC)

## Airports

### [Lock Airport (LOC)](https://www.flightduration.online/airport/loc-lock-lock-airport/1ef266e0-1138-63e2-98ea-06bb2780ed98)

- City: Lock, Australia
- ICAO: YLOK
- Timezone: Australia/Adelaide
- Coordinates: -33.540000, 135.690000
- Elevation: 350 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 20:48 in Lock, it's 04:18 in Seattle.
With a 16.5-hour time difference, expect significant jet lag.

## Related

- [Lock Airport (LOC)](https://www.flightduration.online/airport/loc-lock-lock-airport/1ef266e0-1138-63e2-98ea-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)