AirHint found the following cheapest return flights from Osaka (KIX) to Bandar Seri Begawan (BWN) in September 2025 (see full year).

Return flights

09 Sep - 16 Sep	Philippines AirAsia Inc.
09 Sep - 26 Sep	AirAsia X
09 Sep - 17 Sep	AirAsia X
09 Sep - 21 Sep	AirAsia X
13 Sep - 26 Sep	AirAsia X
13 Sep - 17 Sep	AirAsia X
13 Sep - 21 Sep	AirAsia X
30 Sep - 20 Oct	AirAsia X
25 Sep - 26 Sep	AirAsia X
05 Sep - 08 Sep	Singapore Airlines
01 Sep - 04 Sep	Singapore Airlines
30 Sep - 18 Oct	AirAsia X
30 Sep - 16 Oct	AirAsia X
30 Sep - 21 Oct	AirAsia X
25 Sep - 16 Oct	AirAsia X

Also check the deals for one-way flights from Osaka to Bandar Seri Begawan 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 Bandar Seri Begawan in September from 385€

Return flights