# Distance from Seattle (SEA) to Theda Station Airport (TDN)

> 12,800 km · estimated flight time 16h · Ultra-long-haul route.

## Summary

- **Distance**: 12,800 km / 7,953 mi / 6,911 nm
- **Estimated flight time**: 16h
- **Heading**: 275° (west)
- **Return heading**: 44° (northeast)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → Australia
- **Intercontinental**: North America → Oceania
- **Time difference**: +15h (When it's 21:37 in Seattle, it's 12:37 in Theda Station Airport)
- **Elevation difference**: 432 ft (TDN 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

### [Theda Station Airport (TDN)](https://www.flightduration.online/airport/tdn-theda-station-airport/1ef266e0-1a47-6ed8-9b76-06bb2780ed98)

- City: Theda Station Airport, Australia
- ICAO: YTHD
- Timezone: Australia/Perth
- Coordinates: -14.790000, 126.500000
- 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 21:37 in Seattle, it's 12:37 in Theda Station Airport.
With a 15-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)
- [Theda Station Airport (TDN)](https://www.flightduration.online/airport/tdn-theda-station-airport/1ef266e0-1a47-6ed8-9b76-06bb2780ed98)
- [Flight duration calculator](/#calculator)