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

Return flights

19 Dec - 27 Dec	Air China
12 Dec - 20 Dec	Air China
19 Dec - 03 Jan	Air China
24 Dec - 03 Jan	Air China
14 Dec - 18 Dec	Qatar Airways
03 Dec - 07 Dec	Qatar Airways
14 Dec - 25 Dec	Qatar Airways
08 Dec - 22 Dec	Qatar Airways
08 Dec - 14 Dec	Qatar Airways
07 Dec - 11 Dec	Qatar Airways
14 Dec - 21 Dec	Qatar Airways
04 Dec - 12 Dec	Qatar Airways
25 Dec - 04 Jan	Singapore Airlines
24 Dec - 04 Jan	Singapore Airlines
27 Dec - 05 Jan	Air France
24 Dec - 14 Jan	Qatar Airways
30 Dec - 03 Jan	Air France
27 Dec - 03 Jan	Air France
19 Dec - 02 Jan	LOT
25 Dec - 01 Jan	Qatar Airways

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.

Book a cheap hotel in Istanbul

Cheap car rent in Istanbul

Cheapest return flights from Seoul to Istanbul in December from 492€

Return flights