# Distance from Kolkata (CCU) to Osan Air Base (OSN)

> 4,017 km · estimated flight time 6h · Long-haul route.

## Summary

- **Distance**: 4,017 km / 2,496 mi / 2,169 nm
- **Estimated flight time**: 6h
- **Heading**: 58° (east northeast)
- **Return heading**: 257° (west southwest)
- **Classification**: Long-haul
- **Type**: International (India) → South Korea
- **Time difference**: +3.5h (When it's 08:42 in Kolkata, it's 12:12 in Osan Air Base)
- **Elevation difference**: 22 ft (OSN is higher than CCU)

## Airports

### [Netaji Subhash Chandra Bose International Airport (CCU)](https://www.flightduration.online/airport/ccu-kolkata-netaji-subhash-chandra-bose-international-airport/1ef266df-f023-6fe4-a8d5-06bb2780ed98)

- City: Kolkata, India
- ICAO: VECC
- Timezone: Asia/Kolkata
- Coordinates: 22.650000, 88.450000
- Elevation: 16 ft

### [Osan Air Base (OSN)](https://www.flightduration.online/airport/osn-osan-air-base/1ef266df-8e18-641c-9d4f-06bb2780ed98)

- City: Osan Air Base, South Korea
- ICAO: RKSO
- Timezone: Asia/Seoul
- Coordinates: 37.090000, 127.030000
- Elevation: 38 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 08:42 in Kolkata, it's 12:12 in Osan Air Base.
The 3.5-hour time difference may cause some jet lag.

## Related

- [Netaji Subhash Chandra Bose International Airport (CCU)](https://www.flightduration.online/airport/ccu-kolkata-netaji-subhash-chandra-bose-international-airport/1ef266df-f023-6fe4-a8d5-06bb2780ed98)
- [Osan Air Base (OSN)](https://www.flightduration.online/airport/osn-osan-air-base/1ef266df-8e18-641c-9d4f-06bb2780ed98)
- [Flight duration calculator](/#calculator)