# Distance from Palo Alto (PAO) to Sofia (SOF)

> 10,444 km · estimated flight time 13h · Ultra-long-haul route.

## Summary

- **Distance**: 10,444 km / 6,490 mi / 5,639 nm
- **Estimated flight time**: 13h
- **Heading**: 25° (north northeast)
- **Return heading**: 333° (north northwest)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → Bulgaria
- **Intercontinental**: North America → Europe
- **Time difference**: +10h (When it's 22:48 in Palo Alto, it's 08:48 in Sofia)
- **Elevation difference**: 1,735 ft (SOF is higher than PAO)

## Airports

### [Palo Alto Airport (PAO)](https://www.flightduration.online/airport/pao-palo-alto-palo-alto-airport/1ef266df-3217-6294-bcac-06bb2780ed98)

- City: Palo Alto, United States
- ICAO: KPAO
- Timezone: America/Los_Angeles
- Coordinates: 37.460000, -122.120000
- Elevation: 7 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 22:48 in Palo Alto, it's 08:48 in Sofia.
With a 10-hour time difference, expect significant jet lag.

## Related

- [Palo Alto Airport (PAO)](https://www.flightduration.online/airport/pao-palo-alto-palo-alto-airport/1ef266df-3217-6294-bcac-06bb2780ed98)
- [Sofia Airport (SOF)](https://www.flightduration.online/airport/sof-sofia-sofia-airport/1ef266df-436b-611c-bff1-06bb2780ed98)
- [Flight duration calculator](/#calculator)