Cheapest return flights from Istanbul to Seoul in September from $525

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

Return flights

24 Sep - 22 Oct China Southern
18 Sep - 13 Oct China Southern
23 Sep - 16 Oct China Southern
18 Sep - 14 Oct China Southern
25 Sep - 17 Oct China Southern
23 Sep - 10 Oct China Southern
27 Sep - 27 Oct China Southern
04 Sep - 18 Sep AJet
04 Sep - 11 Sep AJet
11 Sep - 18 Sep AJet
12 Sep - 18 Sep Pegasus Airlines
21 Sep - 14 Oct MIAT Mongolian Airlines
16 Sep - 23 Sep MIAT Mongolian Airlines
11 Sep - 16 Sep Pegasus Airlines
18 Sep - 12 Oct China Southern
12 Sep - 16 Sep Pegasus Airlines
17 Sep - 13 Oct China Southern
09 Sep - 24 Sep MIAT Mongolian Airlines
05 Sep - 11 Sep Pegasus Airlines
04 Sep - 13 Sep AJet

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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