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

Return flights

09 Sep - 17 Sep	T'way Air
18 Sep - 23 Sep	Air China
16 Sep - 23 Sep	Air China
20 Sep - 23 Sep	Air China
08 Sep - 16 Sep	Air China
17 Sep - 23 Sep	Air China
08 Sep - 14 Sep	Air China
09 Sep - 16 Sep	Air China
08 Sep - 12 Sep	Air China
07 Sep - 16 Sep	Air China
26 Sep - 06 Oct	Etihad Airways
28 Sep - 01 Oct	Air France
25 Sep - 06 Oct	KLM
26 Sep - 04 Oct	Etihad Airways

Also check the deals for one-way flights from Osaka to Barcelona 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 Barcelona in September from $796

Return flights