# Distance from Houlton (HUL) to Sofia (SOF)

> 6,831 km · estimated flight time 9h · Long-haul route.

## Summary

- **Distance**: 6,831 km / 4,245 mi / 3,689 nm
- **Estimated flight time**: 9h
- **Heading**: 57° (east northeast)
- **Return heading**: 308° (northwest)
- **Classification**: Long-haul
- **Type**: International (United States) → Bulgaria
- **Intercontinental**: North America → Europe
- **Time difference**: +7h (When it's 22:54 in Houlton, it's 05:54 in Sofia)
- **Elevation difference**: 1,253 ft (SOF is higher than HUL)

## Airports

### [Houlton International Airport (HUL)](https://www.flightduration.online/airport/hul-houlton-houlton-international-airport/1ef266df-21ac-6b02-b9bf-06bb2780ed98)

- City: Houlton, United States
- ICAO: KHUL
- Timezone: America/New_York
- Coordinates: 46.120000, -67.790000
- Elevation: 489 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 22:54 in Houlton, it's 05:54 in Sofia.
With a 7-hour time difference, expect significant jet lag.

## Related

- [Houlton International Airport (HUL)](https://www.flightduration.online/airport/hul-houlton-houlton-international-airport/1ef266df-21ac-6b02-b9bf-06bb2780ed98)
- [Sofia Airport (SOF)](https://www.flightduration.online/airport/sof-sofia-sofia-airport/1ef266df-436b-611c-bff1-06bb2780ed98)
- [Flight duration calculator](/#calculator)