# Distance from Seattle (SEA) to Zhangye (YZY)

> 9,522 km · estimated flight time 12h · Ultra-long-haul route.

## Summary

- **Distance**: 9,522 km / 5,917 mi / 5,141 nm
- **Estimated flight time**: 12h
- **Heading**: 328° (north northwest)
- **Return heading**: 28° (north northeast)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → China
- **Intercontinental**: North America → Asia
- **Time difference**: +15h (When it's 04:46 in Seattle, it's 19:46 in Zhangye)
- **Elevation difference**: 4,848 ft (YZY is higher 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

### [Ganzhou (YZY)](https://www.flightduration.online/airport/yzy-zhangye-ganzhou/1ef266e0-1f4b-62a4-9a11-06bb2780ed98)

- City: Zhangye, China
- ICAO: ZLZY
- Timezone: Asia/Shanghai
- Coordinates: 38.810000, 100.660000
- Elevation: 5,280 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 04:46 in Seattle, it's 19:46 in Zhangye.
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)
- [Ganzhou (YZY)](https://www.flightduration.online/airport/yzy-zhangye-ganzhou/1ef266e0-1f4b-62a4-9a11-06bb2780ed98)
- [Flight duration calculator](/#calculator)