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

Return flights

19 Sep - 23 Sep	Singapore Airlines
19 Sep - 25 Sep	Singapore Airlines
27 Sep - 01 Oct	Singapore Airlines
30 Sep - 07 Oct	Singapore Airlines
20 Sep - 26 Sep	Singapore Airlines
28 Sep - 30 Sep	AirAsia
23 Sep - 27 Sep	Royal Brunei	direct
27 Sep - 01 Oct	Royal Brunei	direct
30 Sep - 07 Oct	Royal Brunei	direct
03 Sep - 11 Sep	AirAsia
27 Sep - 30 Sep	AirAsia
03 Sep - 06 Sep	AirAsia
03 Sep - 12 Sep	AirAsia
07 Sep - 27 Sep	AirAsia
28 Sep - 01 Oct	AirAsia
28 Sep - 07 Oct	AirAsia
30 Sep - 01 Oct	AirAsia
27 Sep - 07 Oct	AirAsia
21 Sep - 01 Oct	AirAsia
21 Sep - 07 Oct	AirAsia

Also check the deals for one-way flights from Bandar Seri Begawan to Bangkok 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 Bandar Seri Begawan to Bangkok in September from $309

Return flights