# Distance from Seattle (SEA) to Yancheng (YNZ)

> 9,078 km · estimated flight time 12h · Ultra-long-haul route.

## Summary

- **Distance**: 9,078 km / 5,641 mi / 4,902 nm
- **Estimated flight time**: 12h
- **Heading**: 312° (northwest)
- **Return heading**: 37° (northeast)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → China
- **Intercontinental**: North America → Asia
- **Time difference**: +15h (When it's 19:15 in Seattle, it's 10:15 in Yancheng)
- **Elevation difference**: 432 ft (YNZ 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

### [Yancheng Airport (YNZ)](https://www.flightduration.online/airport/ynz-yancheng-yancheng-airport/1ef266e0-2073-6320-951f-06bb2780ed98)

- City: Yancheng, China
- ICAO: ZSYN
- Timezone: Asia/Shanghai
- Coordinates: 33.430000, 120.200000
- Elevation: 0 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 19:15 in Seattle, it's 10:15 in Yancheng.
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)
- [Yancheng Airport (YNZ)](https://www.flightduration.online/airport/ynz-yancheng-yancheng-airport/1ef266e0-2073-6320-951f-06bb2780ed98)
- [Flight duration calculator](/#calculator)