# Distance from Sines Airport (SIE) to St Louis (STL)

> 6,853 km · estimated flight time 9h · Long-haul route.

## Summary

- **Distance**: 6,853 km / 4,258 mi / 3,700 nm
- **Estimated flight time**: 9h
- **Heading**: 299° (west northwest)
- **Return heading**: 62° (east northeast)
- **Classification**: Long-haul
- **Type**: International (Portugal) → United States
- **Intercontinental**: Europe → North America
- **Time difference**: -6h (When it's 03:59 in Sines Airport, it's 21:59 in St Louis)
- **Elevation difference**: 617 ft (STL is higher than SIE)

## Airports

### [Sines Airport (SIE)](https://www.flightduration.online/airport/sie-sines-airport/1ef266df-55f7-63c6-861d-06bb2780ed98)

- City: Sines Airport, Portugal
- ICAO: LPSI
- Timezone: Europe/Lisbon
- Coordinates: 37.940000, -8.820000
- Elevation: 0 ft

### [St Louis Lambert International Airport (STL)](https://www.flightduration.online/airport/stl-st-louis-st-louis-lambert-international-airport/1ef266df-39ab-67da-9abe-06bb2780ed98)

- City: St Louis, United States
- ICAO: KSTL
- Timezone: America/Chicago
- Coordinates: 38.750000, -90.370000
- Elevation: 617 ft

## Route notes

This is a long-haul route typically operated by wide-body aircraft such as the Boeing 777 or Airbus A350. Full meal service, in-flight entertainment, and comfort amenities are standard.

Time-zone information: When it's 03:59 in Sines Airport, it's 21:59 in St Louis.
With a 6-hour time difference, expect significant jet lag.

## Related

- [Sines Airport (SIE)](https://www.flightduration.online/airport/sie-sines-airport/1ef266df-55f7-63c6-861d-06bb2780ed98)
- [St Louis Lambert International Airport (STL)](https://www.flightduration.online/airport/stl-st-louis-st-louis-lambert-international-airport/1ef266df-39ab-67da-9abe-06bb2780ed98)
- [Flight duration calculator](/#calculator)