# Distance from Houston (HOU) to Sofia (SOF)

> 9,824 km · estimated flight time 13h · Ultra-long-haul route.

## Summary

- **Distance**: 9,824 km / 6,104 mi / 5,304 nm
- **Estimated flight time**: 13h
- **Heading**: 40° (northeast)
- **Return heading**: 310° (northwest)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → Bulgaria
- **Intercontinental**: North America → Europe
- **Time difference**: +8h (When it's 02:16 in Houston, it's 10:16 in Sofia)
- **Elevation difference**: 1,696 ft (SOF is higher than HOU)

## Airports

### [William P Hobby Airport (HOU)](https://www.flightduration.online/airport/hou-houston-william-p-hobby-airport/1ef266df-211f-6e6e-9c9b-06bb2780ed98)

- City: Houston, United States
- ICAO: KHOU
- Timezone: America/Chicago
- Coordinates: 29.650000, -95.280000
- Elevation: 46 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 02:16 in Houston, it's 10:16 in Sofia.
With a 8-hour time difference, expect significant jet lag.

## Related

- [William P Hobby Airport (HOU)](https://www.flightduration.online/airport/hou-houston-william-p-hobby-airport/1ef266df-211f-6e6e-9c9b-06bb2780ed98)
- [Sofia Airport (SOF)](https://www.flightduration.online/airport/sof-sofia-sofia-airport/1ef266df-436b-611c-bff1-06bb2780ed98)
- [Flight duration calculator](/#calculator)