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

Return flights

27 Sep - 02 Oct	VietJet Air
02 Sep - 13 Sep	China Southern
15 Sep - 19 Sep	China Southern
08 Sep - 19 Sep	China Southern
08 Sep - 12 Sep	China Southern
17 Sep - 23 Sep	China Southern
22 Sep - 28 Sep	Singapore Airlines
25 Sep - 28 Sep	Singapore Airlines
18 Sep - 21 Sep	Air China
06 Sep - 14 Sep	Air China
06 Sep - 12 Sep	Air China
10 Sep - 30 Oct	China Southern
27 Sep - 01 Oct	Singapore Airlines
29 Sep - 03 Oct	Singapore Airlines
30 Sep - 10 Oct	KLM
26 Sep - 02 Oct	Etihad Airways
27 Sep - 04 Oct	Emirates
29 Sep - 04 Oct	KLM
28 Sep - 04 Oct	Air France
27 Sep - 01 Oct	Turkish Airlines	direct

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 665€

Return flights