AirHint found the following cheapest return flights from Seoul (GMP) to Istanbul (IST) in December 2026 (see full year).
Return flights
| 12 Dec - 20 Dec | Air China | ||
| 31 Dec - 03 Jan | Air China | ||
| 14 Dec - 19 Dec | China Southern | ||
| 25 Dec - 02 Jan | China Southern |
Also check the deals for one-way flights from Seoul to Istanbul in December.
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