AirHint found the following cheapest return flights from Seoul (ICN) to Istanbul (IST) in December 2025 (see full year).

Return flights

02 Dec - 07 Dec	Air China
09 Dec - 16 Dec	Etihad Airways
11 Dec - 17 Dec	Etihad Airways
25 Dec - 30 Dec	Etihad Airways
11 Dec - 14 Dec	Etihad Airways
04 Dec - 10 Dec	Etihad Airways
11 Dec - 18 Dec	Etihad Airways
04 Dec - 09 Dec	Etihad Airways
18 Dec - 25 Dec	Etihad Airways
02 Dec - 09 Dec	Etihad Airways
29 Dec - 08 Jan	Emirates
29 Dec - 06 Jan	Emirates
24 Dec - 01 Jan	Emirates
31 Dec - 07 Jan	Emirates
29 Dec - 12 Jan	Emirates
24 Dec - 06 Jan	Emirates
24 Dec - 07 Jan	Emirates
24 Dec - 08 Jan	Emirates
29 Dec - 07 Jan	Emirates
25 Dec - 15 Jan	Emirates

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 440€

Return flights