AirHint found the following cheapest one-way flights from Kolkata (CCU) to Seoul (ICN) in December 2025 (see full year).
One-Way flights
| 10 Dec | IndiGo | ||
| 31 Dec | Air India | ||
| 11 Dec | IndiGo | ||
| 18 Dec | Air India | ||
| 17 Dec | Air India | ||
| 16 Dec | Thai Airways | ||
| 22 Dec | Thai Airways | ||
| 26 Dec | IndiGo | ||
| 15 Dec | Thai Airways | ||
| 19 Dec | Thai Airways |
Also check the deals for return flights from Kolkata to Seoul in December.
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