# Distance from Duncan (DUC) to Sofia (SOF)

> 9,571 km · estimated flight time 12h · Ultra-long-haul route.

## Summary

- **Distance**: 9,571 km / 5,947 mi / 5,168 nm
- **Estimated flight time**: 12h
- **Heading**: 39° (northeast)
- **Return heading**: 315° (northwest)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → Bulgaria
- **Intercontinental**: North America → Europe
- **Time difference**: +8h (When it's 05:12 in Duncan, it's 13:12 in Sofia)
- **Elevation difference**: 628 ft (SOF is higher than DUC)

## Airports

### [Halliburton Field (DUC)](https://flightduration.online/airport/duc-duncan-halliburton-field/1ef266df-17e9-61ce-9cea-06bb2780ed98)

- City: Duncan, United States
- ICAO: KDUC
- Timezone: America/Chicago
- Coordinates: 34.470000, -97.960000
- Elevation: 1,114 ft

### [Sofia Airport (SOF)](https://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 05:12 in Duncan, it's 13:12 in Sofia.
With a 8-hour time difference, expect significant jet lag.

## Related

- [Halliburton Field (DUC)](https://flightduration.online/airport/duc-duncan-halliburton-field/1ef266df-17e9-61ce-9cea-06bb2780ed98)
- [Sofia Airport (SOF)](https://flightduration.online/airport/sof-sofia-sofia-airport/1ef266df-436b-611c-bff1-06bb2780ed98)
- [Flight duration calculator](/#calculator)