# Distance from Boulder City (BLD) to Sofia (SOF)

> 10,300 km · estimated flight time 13h · Ultra-long-haul route.

## Summary

- **Distance**: 10,300 km / 6,400 mi / 5,561 nm
- **Estimated flight time**: 13h
- **Heading**: 29° (north northeast)
- **Return heading**: 327° (north northwest)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → Bulgaria
- **Intercontinental**: North America → Europe
- **Time difference**: +10h (When it's 04:00 in Boulder City, it's 14:00 in Sofia)
- **Elevation difference**: 461 ft (SOF is lower than BLD)

## Airports

### [Boulder City Municipal Airport (BLD)](https://www.flightduration.online/airport/bld-boulder-city-boulder-city-municipal-airport/1ef266df-11c1-654e-99ef-06bb2780ed98)

- City: Boulder City, United States
- ICAO: KBVU
- Timezone: America/Los_Angeles
- Coordinates: 35.950000, -114.860000
- Elevation: 2,203 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 04:00 in Boulder City, it's 14:00 in Sofia.
With a 10-hour time difference, expect significant jet lag.

## Related

- [Boulder City Municipal Airport (BLD)](https://www.flightduration.online/airport/bld-boulder-city-boulder-city-municipal-airport/1ef266df-11c1-654e-99ef-06bb2780ed98)
- [Sofia Airport (SOF)](https://www.flightduration.online/airport/sof-sofia-sofia-airport/1ef266df-436b-611c-bff1-06bb2780ed98)
- [Flight duration calculator](/#calculator)