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

Return flights

05 Dec - 13 Dec	Air China
12 Dec - 20 Dec	Air China
01 Dec - 08 Dec	China Southern
14 Dec - 17 Dec	Qatar Airways
11 Dec - 28 Dec	Qatar Airways
24 Dec - 31 Dec	Qatar Airways
14 Dec - 21 Dec	Qatar Airways
02 Dec - 09 Dec	Qatar Airways
11 Dec - 18 Dec	Qatar Airways
07 Dec - 15 Dec	Qatar Airways
24 Dec - 01 Jan	Qatar Airways
31 Dec - 04 Jan	Qatar Airways
28 Dec - 04 Jan	Qatar Airways
31 Dec - 01 Jan	Qatar Airways
25 Dec - 01 Jan	Qatar Airways
25 Dec - 05 Jan	Qatar Airways
26 Dec - 05 Jan	Qatar Airways
25 Dec - 02 Jan	Lufthansa
19 Dec - 02 Jan	Emirates
25 Dec - 01 Jan	Korean Air	direct

Also check the deals for one-way flights from Seoul to Istanbul 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 Seoul to Istanbul in December from 464€

Return flights