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

Return flights

26 Jul - 04 Aug	Singapore Airlines
16 Jul - 22 Jul	Singapore Airlines
26 Jul - 02 Aug	IndiGo
04 Jul - 14 Jul	IndiGo
04 Jul - 16 Jul	IndiGo
22 Jul - 29 Jul	Singapore Airlines
11 Jul - 20 Jul	IndiGo
25 Jul - 04 Aug	IndiGo
16 Jul - 21 Jul	Thai Airways
04 Jul - 15 Jul	Thai Airways
09 Jul - 17 Jul	IndiGo
05 Jul - 14 Jul	IndiGo
12 Jul - 18 Jul	Air India

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

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 July from $471

Return flights