# Distance from Riyan (RIY) to St Louis (STL)

> 12,751 km · estimated flight time 16h · Ultra-long-haul route.

## Summary

- **Distance**: 12,751 km / 7,923 mi / 6,885 nm
- **Estimated flight time**: 16h
- **Heading**: 326° (north northwest)
- **Return heading**: 43° (northeast)
- **Classification**: Ultra-long-haul
- **Type**: International (Yemen) → United States
- **Intercontinental**: Asia → North America
- **Time difference**: -8h (When it's 12:35 in Riyan, it's 04:35 in St Louis)
- **Elevation difference**: 563 ft (STL is higher than RIY)

## Airports

### [Mukalla International Airport (RIY)](https://www.flightduration.online/airport/riy-riyan-mukalla-international-airport/1ef266df-84ca-6a9a-b18b-06bb2780ed98)

- City: Riyan, Yemen
- ICAO: OYRN
- Timezone: Asia/Aden
- Coordinates: 14.660000, 49.380000
- Elevation: 54 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 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 12:35 in Riyan, it's 04:35 in St Louis.
With a 8-hour time difference, expect significant jet lag.

## Related

- [Mukalla International Airport (RIY)](https://www.flightduration.online/airport/riy-riyan-mukalla-international-airport/1ef266df-84ca-6a9a-b18b-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)