# Distance from Marathon (MTH) to Sofia (SOF)

> 9,260 km · estimated flight time 12h · Ultra-long-haul route.

## Summary

- **Distance**: 9,260 km / 5,754 mi / 5,000 nm
- **Estimated flight time**: 12h
- **Heading**: 46° (northeast)
- **Return heading**: 298° (west northwest)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → Bulgaria
- **Intercontinental**: North America → Europe
- **Time difference**: +7h (When it's 18:18 in Marathon, it's 01:18 in Sofia)
- **Elevation difference**: 1,737 ft (SOF is higher than MTH)

## Airports

### [The Florida Keys Marathon International Airport (MTH)](https://www.flightduration.online/airport/mth-marathon-the-florida-keys-marathon-international-airport/1ef266df-2c6f-6666-a658-06bb2780ed98)

- City: Marathon, United States
- ICAO: KMTH
- Timezone: America/New_York
- Coordinates: 24.730000, -81.050000
- Elevation: 5 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 18:18 in Marathon, it's 01:18 in Sofia.
With a 7-hour time difference, expect significant jet lag.

## Related

- [The Florida Keys Marathon International Airport (MTH)](https://www.flightduration.online/airport/mth-marathon-the-florida-keys-marathon-international-airport/1ef266df-2c6f-6666-a658-06bb2780ed98)
- [Sofia Airport (SOF)](https://www.flightduration.online/airport/sof-sofia-sofia-airport/1ef266df-436b-611c-bff1-06bb2780ed98)
- [Flight duration calculator](/#calculator)