# Distance from Hengchung (HCN) to Seattle (SEA)

> 10,057 km · estimated flight time 13h · Ultra-long-haul route.

## Summary

- **Distance**: 10,057 km / 6,249 mi / 5,430 nm
- **Estimated flight time**: 13h
- **Heading**: 37° (northeast)
- **Return heading**: 304° (northwest)
- **Classification**: Ultra-long-haul
- **Type**: International (Taiwan) → United States
- **Intercontinental**: Asia → North America
- **Time difference**: -15h (When it's 10:45 in Hengchung, it's 19:45 in Seattle)
- **Elevation difference**: 386 ft (SEA is higher than HCN)

## Airports

### [Hengchun Airport (HCN)](https://www.flightduration.online/airport/hcn-hengchung-hengchun-airport/1ef266df-8adc-6122-b93b-06bb2780ed98)

- City: Hengchung, Taiwan
- ICAO: RCKW
- Timezone: Asia/Taipei
- Coordinates: 22.040000, 120.730000
- Elevation: 46 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 10:45 in Hengchung, it's 19:45 in Seattle.
With a 15-hour time difference, expect significant jet lag.

## Related

- [Hengchun Airport (HCN)](https://www.flightduration.online/airport/hcn-hengchung-hengchun-airport/1ef266df-8adc-6122-b93b-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)