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

Return flights

08 Jan - 28 Jan	China Southern
20 Jan - 30 Jan	China Southern
17 Jan - 26 Jan	China Southern
22 Jan - 30 Jan	China Southern
22 Jan - 28 Jan	China Southern
14 Jan - 20 Jan	ANA
19 Jan - 27 Jan	ANA
18 Jan - 29 Jan	Air China
12 Jan - 25 Jan	ANA
27 Jan - 06 Feb	China Southern
05 Jan - 09 Jan	ANA
27 Jan - 23 Feb	China Southern

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 $823

Return flights