# Distance from Koyukuk (KYU) to Sofia (SOF)

> 8,052 km · estimated flight time 10h · Long-haul route.

## Summary

- **Distance**: 8,052 km / 5,003 mi / 4,348 nm
- **Estimated flight time**: 10h
- **Heading**: 359° (north)
- **Return heading**: 1° (north)
- **Classification**: Long-haul
- **Type**: International (United States) → Bulgaria
- **Intercontinental**: North America → Europe
- **Time difference**: +11h (When it's 10:06 in Koyukuk, it's 21:06 in Sofia)
- **Elevation difference**: 1,593 ft (SOF is higher than KYU)

## Airports

### [Koyukuk Airport (KYU)](https://www.flightduration.online/airport/kyu-koyukuk-koyukuk-airport/1ef266df-88db-6e36-97c3-06bb2780ed98)

- City: Koyukuk, United States
- ICAO: PFKU
- Timezone: America/Anchorage
- Coordinates: 64.880000, -157.730000
- Elevation: 149 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 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 10:06 in Koyukuk, it's 21:06 in Sofia.
With a 11-hour time difference, expect significant jet lag.

## Related

- [Koyukuk Airport (KYU)](https://www.flightduration.online/airport/kyu-koyukuk-koyukuk-airport/1ef266df-88db-6e36-97c3-06bb2780ed98)
- [Sofia Airport (SOF)](https://www.flightduration.online/airport/sof-sofia-sofia-airport/1ef266df-436b-611c-bff1-06bb2780ed98)
- [Flight duration calculator](/#calculator)