# Distance from Half Moon Bay (HAF) to Seoul (ICN)

> 9,085 km · estimated flight time 12h · Ultra-long-haul route.

## Summary

- **Distance**: 9,085 km / 5,645 mi / 4,906 nm
- **Estimated flight time**: 12h
- **Heading**: 312° (northwest)
- **Return heading**: 48° (northeast)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → South Korea
- **Intercontinental**: North America → Asia
- **Time difference**: +16h (When it's 06:50 in Half Moon Bay, it's 22:50 in Seoul)
- **Elevation difference**: 43 ft (ICN is lower than HAF)

## Airports

### [Half Moon Bay Airport (HAF)](https://www.flightduration.online/airport/haf-half-moon-bay-half-moon-bay-airport/1ef266df-200a-613c-b79e-06bb2780ed98)

- City: Half Moon Bay, United States
- ICAO: KHAF
- Timezone: America/Los_Angeles
- Coordinates: 37.510000, -122.500000
- Elevation: 66 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 06:50 in Half Moon Bay, it's 22:50 in Seoul.
With a 16-hour time difference, expect significant jet lag.

## Related

- [Half Moon Bay Airport (HAF)](https://www.flightduration.online/airport/haf-half-moon-bay-half-moon-bay-airport/1ef266df-200a-613c-b79e-06bb2780ed98)
- [Incheon International Airport (ICN)](https://www.flightduration.online/airport/icn-seoul-incheon-international-airport/1ef266df-8e0e-6aac-85a0-06bb2780ed98)
- [Flight duration calculator](/#calculator)