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

Return flights

17 Dec - 27 Dec	Air China
24 Dec - 01 Jan	Air China
24 Dec - 03 Jan	Air China
01 Dec - 11 Dec	Air China
15 Dec - 22 Dec	Qatar Airways
11 Dec - 18 Dec	Qatar Airways
10 Dec - 17 Dec	Qatar Airways
07 Dec - 11 Dec	Qatar Airways
28 Dec - 01 Jan	Qatar Airways
31 Dec - 22 Jan	Qatar Airways
30 Dec - 04 Jan	Qatar Airways
14 Dec - 19 Dec	Qatar Airways
11 Dec - 20 Dec	Qatar Airways
27 Dec - 04 Jan	Air France
05 Dec - 12 Dec	Qatar Airways
03 Dec - 12 Dec	Qatar Airways
23 Dec - 07 Jan	Qatar Airways
27 Dec - 03 Jan	Air France
26 Dec - 03 Jan	LOT
27 Dec - 01 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 492€

Return flights