AirHint found the following cheapest one-way flights from Seoul (GMP) to Istanbul (IST) in September 2025 (see full year).
One-Way flights
| 03 Sep | China Southern | ||
| 11 Sep | Air China | ||
| 17 Sep | China Southern | ||
| 18 Sep | Air China | ||
| 16 Sep | Air China | ||
| 01 Sep | Jin Air | ||
| 12 Sep | China Southern | ||
| 08 Sep | China Southern | ||
| 05 Sep | China Southern | ||
| 10 Sep | China Southern |
Also check the deals for return flights from Seoul to Istanbul in September.
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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