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
10 Sep - 17 Sep	Air China
17 Sep - 23 Sep	Air China
22 Sep - 24 Sep	Air China
18 Sep - 22 Sep	Air China
10 Sep - 15 Sep	Air China
15 Sep - 22 Sep	Air China
17 Sep - 24 Sep	Air China
10 Sep - 14 Sep	Air China
08 Sep - 16 Sep	Air China
25 Sep - 03 Oct	Air China
24 Sep - 03 Oct	Singapore Airlines
24 Sep - 02 Oct	Etihad Airways
29 Sep - 04 Oct	Air China
28 Sep - 11 Oct	Air China
30 Sep - 07 Oct	Air China

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 697€

Return flights