# Distance from Fort Sill (FSI) to Helsinki (HEL)

> 8,266 km · estimated flight time 11h · Long-haul route.

## Summary

- **Distance**: 8,266 km / 5,136 mi / 4,463 nm
- **Estimated flight time**: 11h
- **Heading**: 25° (north northeast)
- **Return heading**: 314° (northwest)
- **Classification**: Long-haul
- **Type**: International (United States) → Finland
- **Intercontinental**: North America → Europe
- **Time difference**: +8h (When it's 22:46 in Fort Sill, it's 06:46 in Helsinki)
- **Elevation difference**: 1,009 ft (HEL is lower than FSI)

## Airports

### [Henry Post Army Air Field (Fort Sill) Airport (FSI)](https://www.flightduration.online/airport/fsi-fort-sill-henry-post-army-air-field-fort-sill-airport/1ef266df-1cfa-6ffa-9bda-06bb2780ed98)

- City: Fort Sill, United States
- ICAO: KFSI
- Timezone: America/Chicago
- Coordinates: 34.650000, -98.400000
- Elevation: 1,188 ft

### [Helsinki Vantaa Airport (HEL)](https://www.flightduration.online/airport/hel-helsinki-helsinki-vantaa-airport/1ef266de-c121-6940-a083-06bb2780ed98)

- City: Helsinki, Finland
- ICAO: EFHK
- Timezone: Europe/Helsinki
- Coordinates: 60.320000, 24.960000
- Elevation: 179 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 22:46 in Fort Sill, it's 06:46 in Helsinki.
With a 8-hour time difference, expect significant jet lag.

## Related

- [Henry Post Army Air Field (Fort Sill) Airport (FSI)](https://www.flightduration.online/airport/fsi-fort-sill-henry-post-army-air-field-fort-sill-airport/1ef266df-1cfa-6ffa-9bda-06bb2780ed98)
- [Helsinki Vantaa Airport (HEL)](https://www.flightduration.online/airport/hel-helsinki-helsinki-vantaa-airport/1ef266de-c121-6940-a083-06bb2780ed98)
- [Flight duration calculator](/#calculator)