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

Return flights

02 Sep - 24 Sep	Hainan Airlines
16 Sep - 22 Sep	T'way Air
11 Sep - 16 Sep	Hainan Airlines
09 Sep - 13 Sep	Air China
17 Sep - 21 Sep	T'way Air
19 Sep - 24 Sep	Air China
20 Sep - 22 Sep	Air China
18 Sep - 24 Sep	Air China
22 Sep - 26 Sep	Air China
19 Sep - 28 Sep	Air China
20 Sep - 01 Oct	Air China
23 Sep - 04 Oct	Air China
28 Sep - 05 Oct	Air China
24 Sep - 03 Oct	Air China
29 Sep - 06 Oct	Vietnam Airlines
29 Sep - 04 Oct	Etihad Airways
28 Sep - 01 Oct	Air France
28 Sep - 04 Oct	Air France
23 Sep - 03 Oct	KLM
26 Sep - 12 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 621€

Return flights