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

Return flights

23 Sep - 14 Oct	T'way Air
28 Sep - 14 Oct	MIAT Mongolian Airlines
23 Sep - 07 Oct	Ryanair
28 Sep - 15 Oct	MIAT Mongolian Airlines
29 Sep - 15 Oct	MIAT Mongolian Airlines
23 Sep - 30 Sep	Ryanair
30 Sep - 15 Oct	Turkish Airlines
20 Sep - 13 Oct	MIAT Mongolian Airlines
25 Sep - 03 Oct	AJet
29 Sep - 19 Oct	MIAT Mongolian Airlines
22 Sep - 09 Oct	T'way Air
22 Sep - 29 Sep	T'way Air
23 Sep - 26 Sep	T'way Air
20 Sep - 27 Sep	MIAT Mongolian Airlines

Also check the deals for one-way flights from Frankfurt 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 Frankfurt to Osaka in September from $835

Return flights