# Distance from Cahokia/St Louis (CPS) to Seoul (ICN)

> 10,766 km · estimated flight time 14h · Ultra-long-haul route.

## Summary

- **Distance**: 10,766 km / 6,690 mi / 5,813 nm
- **Estimated flight time**: 14h
- **Heading**: 332° (north northwest)
- **Return heading**: 28° (north northeast)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → South Korea
- **Intercontinental**: North America → Asia
- **Time difference**: +14h (When it's 05:50 in Cahokia/St Louis, it's 19:50 in Seoul)
- **Elevation difference**: 390 ft (ICN is lower than CPS)

## Airports

### [St Louis Downtown Airport (CPS)](https://www.flightduration.online/airport/cps-cahokiast-louis-st-louis-downtown-airport/1ef266df-14d9-6b50-a477-06bb2780ed98)

- City: Cahokia/St Louis, United States
- ICAO: KCPS
- Timezone: America/Chicago
- Coordinates: 38.570000, -90.160000
- Elevation: 413 ft

### [Incheon International Airport (ICN)](https://www.flightduration.online/airport/icn-seoul-incheon-international-airport/1ef266df-8e0e-6aac-85a0-06bb2780ed98)

- City: Seoul, South Korea
- ICAO: RKSI
- Timezone: Asia/Seoul
- Coordinates: 37.470000, 126.450000
- Elevation: 23 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 05:50 in Cahokia/St Louis, it's 19:50 in Seoul.
With a 14-hour time difference, expect significant jet lag.

## Related

- [St Louis Downtown Airport (CPS)](https://www.flightduration.online/airport/cps-cahokiast-louis-st-louis-downtown-airport/1ef266df-14d9-6b50-a477-06bb2780ed98)
- [Incheon International Airport (ICN)](https://www.flightduration.online/airport/icn-seoul-incheon-international-airport/1ef266df-8e0e-6aac-85a0-06bb2780ed98)
- [Flight duration calculator](/#calculator)