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

Return flights

16 Sep - 28 Sep	Ryanair
22 Sep - 29 Sep	AJet
24 Sep - 05 Oct	Pegasus Airlines
16 Sep - 26 Sep	Ryanair
20 Sep - 30 Sep	Pegasus Airlines
28 Sep - 05 Oct	Turkish Airlines
19 Sep - 26 Sep	Pegasus Airlines
20 Sep - 27 Sep	Pegasus Airlines
22 Sep - 30 Sep	Pegasus Airlines
30 Sep - 04 Oct	Ryanair

Also check the deals for one-way flights from Cologne to Osaka 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 Cologne to Osaka in September from 842€

Return flights