# Distance from Seattle (SEA) to Sion (SIR)

> 8,507 km · estimated flight time 11h · Long-haul route.

## Summary

- **Distance**: 8,507 km / 5,286 mi / 4,593 nm
- **Estimated flight time**: 11h
- **Heading**: 33° (north northeast)
- **Return heading**: 328° (north northwest)
- **Classification**: Long-haul
- **Type**: International (United States) → Switzerland
- **Intercontinental**: North America → Europe
- **Time difference**: +9h (When it's 02:03 in Seattle, it's 11:03 in Sion)
- **Elevation difference**: 1,153 ft (SIR 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

### [Sion Airport (SIR)](https://www.flightduration.online/airport/sir-sion-sion-airport/1ef266df-5741-6844-a33f-06bb2780ed98)

- City: Sion, Switzerland
- ICAO: LSGS
- Timezone: Europe/Zurich
- Coordinates: 46.220000, 7.330000
- Elevation: 1,585 ft

## Route notes

This is a long-haul route typically operated by wide-body aircraft such as the Boeing 777 or Airbus A350. Full meal service, in-flight entertainment, and comfort amenities are standard.

Time-zone information: When it's 02:03 in Seattle, it's 11:03 in Sion.
With a 9-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)
- [Sion Airport (SIR)](https://www.flightduration.online/airport/sir-sion-sion-airport/1ef266df-5741-6844-a33f-06bb2780ed98)
- [Flight duration calculator](/#calculator)