# Distance from Portland (PDX) to Silistra (SLS)

> 9,611 km · estimated flight time 12h · Ultra-long-haul route.

## Summary

- **Distance**: 9,611 km / 5,972 mi / 5,189 nm
- **Estimated flight time**: 12h
- **Heading**: 21° (north northeast)
- **Return heading**: 339° (north northwest)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → Bulgaria
- **Intercontinental**: North America → Europe
- **Time difference**: +10h (When it's 20:34 in Portland, it's 06:34 in Silistra)
- **Elevation difference**: 320 ft (SLS is higher than PDX)

## Airports

### [Portland International Airport (PDX)](https://www.flightduration.online/airport/pdx-portland-portland-international-airport/1ef266df-3254-60d6-87f6-06bb2780ed98)

- City: Portland, United States
- ICAO: KPDX
- Timezone: America/Los_Angeles
- Coordinates: 45.590000, -122.600000
- Elevation: 31 ft

### [Silistra Polkovnik Lambrinovo Airfield (SLS)](https://www.flightduration.online/airport/sls-silistra-silistra-polkovnik-lambrinovo-airfield/1ef266df-4371-6c24-944f-06bb2780ed98)

- City: Silistra, Bulgaria
- ICAO: LBSS
- Timezone: Europe/Sofia
- Coordinates: 44.060000, 27.180000
- Elevation: 351 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 20:34 in Portland, it's 06:34 in Silistra.
With a 10-hour time difference, expect significant jet lag.

## Related

- [Portland International Airport (PDX)](https://www.flightduration.online/airport/pdx-portland-portland-international-airport/1ef266df-3254-60d6-87f6-06bb2780ed98)
- [Silistra Polkovnik Lambrinovo Airfield (SLS)](https://www.flightduration.online/airport/sls-silistra-silistra-polkovnik-lambrinovo-airfield/1ef266df-4371-6c24-944f-06bb2780ed98)
- [Flight duration calculator](/#calculator)