# Distance from Seattle (SEA) to Strathmore Airport (STH)

> 11,837 km · estimated flight time 15h · Ultra-long-haul route.

## Summary

- **Distance**: 11,837 km / 7,355 mi / 6,392 nm
- **Estimated flight time**: 15h
- **Heading**: 261° (west)
- **Return heading**: 45° (northeast)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → Australia
- **Intercontinental**: North America → Oceania
- **Time difference**: +17h (When it's 16:53 in Seattle, it's 09:53 in Strathmore Airport)
- **Elevation difference**: 432 ft (STH is lower than SEA)

## Airports

### [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

### [Strathmore Airport (STH)](https://www.flightduration.online/airport/sth-strathmore-airport/1ef266e0-193a-6b58-9a5c-06bb2780ed98)

- City: Strathmore Airport, Australia
- ICAO: YSMR
- Timezone: Australia/Brisbane
- Coordinates: -17.850000, 142.570000
- Elevation: 0 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 16:53 in Seattle, it's 09:53 in Strathmore Airport.
With a 17-hour time difference, expect significant jet lag.

## Related

- [Seattle-Tacoma International Airport (SEA)](https://www.flightduration.online/airport/sea-seattle-seattle-tacoma-international-airport/1ef266df-37e8-64a2-a4f1-06bb2780ed98)
- [Strathmore Airport (STH)](https://www.flightduration.online/airport/sth-strathmore-airport/1ef266e0-193a-6b58-9a5c-06bb2780ed98)
- [Flight duration calculator](/#calculator)