Cheapest return flights from Istanbul to Seoul in September from $636

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

Return flights

16 Sep - 23 Sep MIAT Mongolian Airlines
11 Sep - 18 Sep MIAT Mongolian Airlines
09 Sep - 18 Sep MIAT Mongolian Airlines
07 Sep - 15 Sep MIAT Mongolian Airlines
04 Sep - 16 Sep MIAT Mongolian Airlines
09 Sep - 23 Sep MIAT Mongolian Airlines
07 Sep - 16 Sep MIAT Mongolian Airlines
14 Sep - 23 Sep MIAT Mongolian Airlines
11 Sep - 16 Sep MIAT Mongolian Airlines
14 Sep - 22 Sep MIAT Mongolian Airlines
30 Sep - 07 Oct MIAT Mongolian Airlines
30 Sep - 20 Oct Etihad Airways
30 Sep - 21 Oct Etihad Airways
26 Sep - 12 Oct Etihad Airways
29 Sep - 16 Oct Thai Airways
28 Sep - 12 Oct Etihad Airways
22 Sep - 11 Oct Etihad Airways
29 Sep - 13 Oct Etihad Airways
29 Sep - 20 Oct Etihad Airways
27 Sep - 12 Oct Etihad Airways

Also check the deals for one-way flights from Istanbul to Seoul in September.

Skyscanner

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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