Cheapest return IST–ICN flights, September

AirHint found the following cheapest return flights from Istanbul (IST) to Seoul (ICN) in September 2026 (see full year).

Return flights

06 Sep - 21 Sep Turkmenistan Airlines
07 Sep - 12 Oct Turkmenistan Airlines
13 Sep - 28 Sep Turkmenistan Airlines
07 Sep - 21 Sep Turkmenistan Airlines
13 Sep - 21 Sep Turkmenistan Airlines
20 Sep - 28 Sep Turkmenistan Airlines
28 Sep - 19 Oct Turkmenistan Airlines
07 Sep - 05 Oct Turkmenistan Airlines
28 Sep - 05 Oct Turkmenistan Airlines
14 Sep - 28 Sep Turkmenistan Airlines
06 Sep - 14 Sep Turkmenistan Airlines
21 Sep - 28 Sep Turkmenistan Airlines
14 Sep - 21 Sep Turkmenistan Airlines
07 Sep - 14 Sep Turkmenistan Airlines
21 Sep - 05 Oct Turkmenistan Airlines
14 Sep - 14 Oct Air China
16 Sep - 21 Oct Air China
16 Sep - 23 Oct Air China
16 Sep - 22 Oct Air China
26 Sep - 09 Oct Pegasus Airlines

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

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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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