Cheapest return flights from Istanbul to Seoul in September from $654

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

Return flights

28 Sep - 14 Oct Air China
16 Sep - 13 Oct MIAT Mongolian Airlines
16 Sep - 14 Oct MIAT Mongolian Airlines
16 Sep - 23 Sep MIAT Mongolian Airlines
16 Sep - 20 Sep MIAT Mongolian Airlines
25 Sep - 11 Oct Wizz Air UK
26 Sep - 10 Oct Wizz Air UK
24 Sep - 30 Sep Turkish Airlines
18 Sep - 12 Oct Turkish Airlines
27 Sep - 10 Oct China Southern
18 Sep - 21 Sep Turkish Airlines
25 Sep - 30 Sep China Southern
18 Sep - 27 Sep Turkish Airlines
18 Sep - 28 Sep Turkish Airlines
20 Sep - 14 Oct Turkish Airlines
23 Sep - 28 Sep Turkish Airlines
26 Sep - 28 Sep Turkish Airlines
21 Sep - 27 Sep Uzbekistan Airways
20 Sep - 12 Oct Turkish Airlines
20 Sep - 07 Oct Turkish Airlines

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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