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

Return flights

30 Sep - 07 Oct	Singapore Airlines
29 Sep - 04 Oct	Singapore Airlines
23 Sep - 30 Sep	Singapore Airlines
23 Sep - 07 Oct	Singapore Airlines
28 Sep - 04 Oct	Singapore Airlines
04 Sep - 09 Sep	Hainan Airlines
12 Sep - 24 Sep	Thai AirAsia X
15 Sep - 02 Oct	Singapore Airlines
12 Sep - 23 Sep	Singapore Airlines
17 Sep - 24 Sep	Hainan Airlines
10 Sep - 19 Sep	Hainan Airlines
08 Sep - 14 Sep	Singapore Airlines
15 Sep - 30 Sep	Lufthansa
15 Sep - 29 Sep	Lufthansa

Also check the deals for one-way flights from Osaka to Brussels 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 Brussels in September from $763

Return flights