# Distance from Herlong (AHC) to Seoul (ICN)

> 9,031 km · estimated flight time 12h · Ultra-long-haul route.

## Summary

- **Distance**: 9,031 km / 5,611 mi / 4,876 nm
- **Estimated flight time**: 12h
- **Heading**: 313° (northwest)
- **Return heading**: 45° (northeast)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → South Korea
- **Intercontinental**: North America → Asia
- **Time difference**: +16h (When it's 01:24 in Herlong, it's 17:24 in Seoul)
- **Elevation difference**: 3,989 ft (ICN is lower than AHC)

## Airports

### [Amedee Army Air Field (AHC)](https://flightduration.online/airport/ahc-herlong-amedee-army-air-field/1ef266df-0da9-6f56-8358-06bb2780ed98)

- City: Herlong, United States
- ICAO: KAHC
- Timezone: America/Los_Angeles
- Coordinates: 40.270000, -120.150000
- Elevation: 4,012 ft

### [Incheon International Airport (ICN)](https://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 01:24 in Herlong, it's 17:24 in Seoul.
With a 16-hour time difference, expect significant jet lag.

## Related

- [Amedee Army Air Field (AHC)](https://flightduration.online/airport/ahc-herlong-amedee-army-air-field/1ef266df-0da9-6f56-8358-06bb2780ed98)
- [Incheon International Airport (ICN)](https://flightduration.online/airport/icn-seoul-incheon-international-airport/1ef266df-8e0e-6aac-85a0-06bb2780ed98)
- [Flight duration calculator](/#calculator)