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

Return flights

18 Sep - 24 Sep	Air China
25 Sep - 22 Oct	Air China
20 Sep - 24 Sep	Air China
09 Sep - 24 Sep	Air China
25 Sep - 05 Oct	Air China
18 Sep - 26 Sep	Air China
11 Sep - 17 Sep	Air China
09 Sep - 19 Sep	Air China
09 Sep - 17 Sep	Air China
16 Sep - 24 Sep	Air China
09 Sep - 12 Sep	Air China
04 Sep - 11 Sep	Jeju Air
21 Sep - 22 Oct	Sichuan Airlines
19 Sep - 20 Oct	China Eastern
04 Sep - 07 Oct	Hainan Airlines
24 Sep - 01 Oct	Singapore Airlines
18 Sep - 08 Oct	Air China
27 Sep - 15 Oct	Singapore Airlines
28 Sep - 05 Oct	Singapore Airlines
23 Sep - 02 Oct	Etihad Airways

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

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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Cheapest return flights from Osaka to Istanbul in September from $507

Return flights