# Distance from Nakhon Si Thammarat (NST) to Seattle (SEA)

> 12,530 km · estimated flight time 16h · Ultra-long-haul route.

## Summary

- **Distance**: 12,530 km / 7,786 mi / 6,765 nm
- **Estimated flight time**: 16h
- **Heading**: 30° (north northeast)
- **Return heading**: 314° (northwest)
- **Classification**: Ultra-long-haul
- **Type**: International (Thailand) → United States
- **Intercontinental**: Asia → North America
- **Time difference**: -14h (When it's 06:35 in Nakhon Si Thammarat, it's 16:35 in Seattle)
- **Elevation difference**: 419 ft (SEA is higher than NST)

## Airports

### [Nakhon Si Thammarat Airport (NST)](https://www.flightduration.online/airport/nst-nakhon-si-thammarat-nakhon-si-thammarat-airport/1ef266df-f592-65a2-bd35-06bb2780ed98)

- City: Nakhon Si Thammarat, Thailand
- ICAO: VTSF
- Timezone: Asia/Bangkok
- Coordinates: 8.540000, 99.940000
- Elevation: 13 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 06:35 in Nakhon Si Thammarat, it's 16:35 in Seattle.
With a 14-hour time difference, expect significant jet lag.

## Related

- [Nakhon Si Thammarat Airport (NST)](https://www.flightduration.online/airport/nst-nakhon-si-thammarat-nakhon-si-thammarat-airport/1ef266df-f592-65a2-bd35-06bb2780ed98)
- [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)