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

Return flights

09 Dec - 15 Dec	LOT
07 Dec - 19 Dec	LOT
26 Dec - 09 Jan	LOT
26 Dec - 10 Jan	LOT
13 Dec - 03 Jan	Qatar Airways
15 Dec - 02 Jan	Qatar Airways
18 Dec - 03 Jan	Qatar Airways
13 Dec - 20 Dec	Qatar Airways
15 Dec - 02 Jan	Asiana Airlines	direct
26 Dec - 09 Jan	Asiana Airlines	direct
13 Dec - 20 Dec	Turkish Airlines	direct
07 Dec - 19 Dec	Turkish Airlines	direct
09 Dec - 15 Dec	Turkish Airlines	direct
25 Dec - 01 Jan	Emirates

Also check the deals for one-way flights from Istanbul to Seoul in December.

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 December from 544€

Return flights