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

Return flights

30 Jul - 05 Aug	Singapore Airlines
27 Jul - 08 Aug	Singapore Airlines
27 Jul - 06 Aug	Singapore Airlines
27 Jul - 01 Aug	IndiGo
25 Jul - 31 Jul	IndiGo
26 Jul - 02 Aug	Air India
26 Jul - 01 Aug	Air India
09 Jul - 16 Jul	IndiGo
12 Jul - 24 Jul	Air India
08 Jul - 10 Aug	Thai Airways
11 Jul - 27 Jul	IndiGo
07 Jul - 14 Jul	IndiGo
19 Jul - 31 Jul	Air India
18 Jul - 26 Jul	IndiGo
11 Jul - 26 Jul	IndiGo
12 Jul - 26 Jul	IndiGo

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 424€

Return flights