Cheapest return flights from Seoul to Istanbul in September from $711

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

Return flights

07 Sep - 15 Sep Air China
10 Sep - 17 Sep Air China
10 Sep - 22 Sep Air China
05 Sep - 17 Sep Air China
06 Sep - 17 Sep China Southern
14 Sep - 22 Sep China Southern
07 Sep - 14 Sep China Southern
04 Sep - 14 Sep China Southern
06 Sep - 15 Sep China Southern
16 Sep - 21 Sep China Southern
27 Sep - 03 Oct China Southern
14 Sep - 01 Oct China Southern
29 Sep - 03 Oct ANA
16 Sep - 10 Oct China Southern
21 Sep - 03 Oct China Southern
23 Sep - 03 Oct China Southern
22 Sep - 05 Oct ANA
18 Sep - 10 Oct ANA
25 Sep - 10 Oct ANA
28 Sep - 02 Oct Air China

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

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