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

Return flights

18 Jan - 31 Jan	LOT
17 Jan - 31 Jan	LOT
31 Jan - 07 Feb	LOT
18 Jan - 28 Jan	LOT
09 Jan - 16 Jan	China Southern
15 Jan - 29 Jan	China Southern
05 Jan - 11 Jan	China Southern
24 Jan - 29 Jan	China Southern
13 Jan - 18 Jan	China Southern
05 Jan - 19 Jan	China Southern
15 Jan - 21 Jan	China Southern
28 Jan - 02 Feb	China Southern
24 Jan - 06 Feb	China Southern
28 Jan - 06 Feb	China Southern
29 Jan - 07 Feb	LOT
26 Jan - 11 Feb	LOT
26 Jan - 04 Feb	LOT
26 Jan - 02 Feb	LOT
26 Jan - 01 Feb	Etihad Airways
26 Jan - 06 Feb	Etihad Airways

Also check the deals for one-way flights from Istanbul to Seoul 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 Istanbul to Seoul in January from $638

Return flights