# Distance from Seattle (SEA) to St Leonard (YSL)

> 4,021 km · estimated flight time 6h · Long-haul route.

## Summary

- **Distance**: 4,021 km / 2,499 mi / 2,171 nm
- **Estimated flight time**: 6h
- **Heading**: 70° (east northeast)
- **Return heading**: 291° (west northwest)
- **Classification**: Long-haul
- **Type**: International (United States) → Canada
- **Time difference**: +4h (When it's 21:35 in Seattle, it's 01:35 in St Leonard)
- **Elevation difference**: 361 ft (YSL 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

### [St Leonard Airport (YSL)](https://www.flightduration.online/airport/ysl-st-leonard-st-leonard-airport/1ef266de-b2ac-61a8-8fe6-06bb2780ed98)

- City: St Leonard, Canada
- ICAO: CYSL
- Timezone: America/Moncton
- Coordinates: 47.160000, -67.830000
- Elevation: 793 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 21:35 in Seattle, it's 01:35 in St Leonard.
The 4-hour time difference may cause some jet lag.

## Related

- [Seattle-Tacoma International Airport (SEA)](https://www.flightduration.online/airport/sea-seattle-seattle-tacoma-international-airport/1ef266df-37e8-64a2-a4f1-06bb2780ed98)
- [St Leonard Airport (YSL)](https://www.flightduration.online/airport/ysl-st-leonard-st-leonard-airport/1ef266de-b2ac-61a8-8fe6-06bb2780ed98)
- [Flight duration calculator](/#calculator)