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

Return flights

17 Jan - 30 Jan	China Southern
17 Jan - 22 Jan	China Southern
16 Jan - 23 Jan	China Southern
24 Jan - 29 Jan	China Southern
15 Jan - 22 Jan	China Southern
19 Jan - 26 Jan	China Southern
17 Jan - 31 Jan	LOT
24 Jan - 31 Jan	LOT
26 Jan - 30 Jan	China Southern
20 Jan - 27 Jan	MIAT Mongolian Airlines
29 Jan - 03 Feb	LOT
29 Jan - 03 Feb	Asiana Airlines	direct

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 $589

Return flights