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

Return flights

16 Aug - 21 Aug	Thai Lion Air
20 Aug - 27 Aug	IndiGo
22 Aug - 27 Aug	IndiGo
27 Aug - 31 Aug	Singapore Airlines
08 Aug - 22 Aug	IndiGo
07 Aug - 12 Aug	IndiGo
10 Aug - 22 Aug	Malaysia Airlines
08 Aug - 15 Aug	IndiGo
13 Aug - 04 Sep	Air India
09 Aug - 01 Sep	IndiGo
11 Aug - 17 Aug	IndiGo
09 Aug - 24 Aug	IndiGo
09 Aug - 15 Sep	Malaysia Airlines

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 414€

Return flights