# Distance from Fort Sill (FSI) to Sofia (SOF)

> 9,581 km · estimated flight time 12h · Ultra-long-haul route.

## Summary

- **Distance**: 9,581 km / 5,953 mi / 5,173 nm
- **Estimated flight time**: 12h
- **Heading**: 39° (northeast)
- **Return heading**: 316° (northwest)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → Bulgaria
- **Intercontinental**: North America → Europe
- **Time difference**: +8h (When it's 15:19 in Fort Sill, it's 23:19 in Sofia)
- **Elevation difference**: 554 ft (SOF is higher 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

### [Sofia Airport (SOF)](https://www.flightduration.online/airport/sof-sofia-sofia-airport/1ef266df-436b-611c-bff1-06bb2780ed98)

- City: Sofia, Bulgaria
- ICAO: LBSF
- Timezone: Europe/Sofia
- Coordinates: 42.700000, 23.410000
- Elevation: 1,742 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 15:19 in Fort Sill, it's 23:19 in Sofia.
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)
- [Sofia Airport (SOF)](https://www.flightduration.online/airport/sof-sofia-sofia-airport/1ef266df-436b-611c-bff1-06bb2780ed98)
- [Flight duration calculator](/#calculator)