# Distance from Chiayi City (CYI) to Seattle (SEA)

> 9,952 km · estimated flight time 13h · Ultra-long-haul route.

## Summary

- **Distance**: 9,952 km / 6,184 mi / 5,373 nm
- **Estimated flight time**: 13h
- **Heading**: 37° (northeast)
- **Return heading**: 305° (northwest)
- **Classification**: Ultra-long-haul
- **Type**: International (Taiwan) → United States
- **Intercontinental**: Asia → North America
- **Time difference**: -15h (When it's 17:01 in Chiayi City, it's 02:01 in Seattle)
- **Elevation difference**: 347 ft (SEA is higher than CYI)

## Airports

### [Chiayi Airport (CYI)](https://www.flightduration.online/airport/cyi-chiayi-city-chiayi-airport/1ef266df-8ad7-6f1e-b1d3-06bb2780ed98)

- City: Chiayi City, Taiwan
- ICAO: RCKU
- Timezone: Asia/Taipei
- Coordinates: 23.460000, 120.390000
- Elevation: 85 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 17:01 in Chiayi City, it's 02:01 in Seattle.
With a 15-hour time difference, expect significant jet lag.

## Related

- [Chiayi Airport (CYI)](https://www.flightduration.online/airport/cyi-chiayi-city-chiayi-airport/1ef266df-8ad7-6f1e-b1d3-06bb2780ed98)
- [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)