# Distance from Seattle (SEA) to Tainan City (TNN)

> 10,008 km · estimated flight time 13h · Ultra-long-haul route.

## Summary

- **Distance**: 10,008 km / 6,219 mi / 5,404 nm
- **Estimated flight time**: 13h
- **Heading**: 305° (northwest)
- **Return heading**: 37° (northeast)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → Taiwan
- **Intercontinental**: North America → Asia
- **Time difference**: +15h (When it's 22:15 in Seattle, it's 13:15 in Tainan City)
- **Elevation difference**: 369 ft (TNN 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

### [Tainan Airport (TNN)](https://www.flightduration.online/airport/tnn-tainan-city-tainan-airport/1ef266df-8aef-6c86-a5dd-06bb2780ed98)

- City: Tainan City, Taiwan
- ICAO: RCNN
- Timezone: Asia/Taipei
- Coordinates: 22.950000, 120.210000
- Elevation: 63 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 22:15 in Seattle, it's 13:15 in Tainan City.
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)
- [Tainan Airport (TNN)](https://www.flightduration.online/airport/tnn-tainan-city-tainan-airport/1ef266df-8aef-6c86-a5dd-06bb2780ed98)
- [Flight duration calculator](/#calculator)