AirHint found the following cheapest return flights from Kolkata (CCU) to Seoul (ICN) in August 2025 (see full year).

Return flights

13 Aug - 18 Aug	AirAsia
10 Aug - 18 Aug	AirAsia
17 Aug - 24 Aug	AirAsia
15 Aug - 22 Aug	Singapore Airlines
15 Aug - 23 Aug	Singapore Airlines
20 Aug - 23 Aug	Singapore Airlines
20 Aug - 27 Aug	Singapore Airlines
24 Aug - 31 Aug	Singapore Airlines
20 Aug - 28 Aug	Singapore Airlines
07 Aug - 14 Aug	Singapore Airlines
19 Aug - 22 Sep	IndiGo

Also check the deals for one-way flights from Kolkata to Seoul in August.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Kolkata to Seoul in August from 314€

Return flights