AirHint found the following cheapest return flights from Seoul (ICN) to Kolkata (CCU) in January 2026 (see full year).

Return flights

16 Jan - 24 Jan	Thai VietJet Air
18 Jan - 19 Jan	Thai VietJet Air
31 Jan - 07 Feb	Thai Airways
17 Jan - 18 Jan	Thai VietJet Air
18 Jan - 18 Jan	VietJet Air
21 Jan - 18 Feb	Thai VietJet Air
18 Jan - 18 Feb	Thai VietJet Air
19 Jan - 18 Feb	Thai VietJet Air
20 Jan - 18 Feb	Thai Airways
17 Jan - 18 Feb	Thai Airways
19 Jan - 19 Jan	VietJet Air
21 Jan - 17 Feb	Thai VietJet Air
17 Jan - 17 Feb	Thai VietJet Air

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

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 Seoul to Kolkata in January from $506

Return flights