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

Return flights

13 Dec - 19 Dec	AirAsia
01 Dec - 07 Dec	Singapore Airlines
08 Dec - 14 Dec	Singapore Airlines
27 Dec - 31 Dec	Singapore Airlines
27 Dec - 31 Dec	Royal Brunei	direct
19 Dec - 09 Jan	AirAsia
19 Dec - 07 Jan	AirAsia
23 Dec - 31 Dec	Royal Brunei	direct
08 Dec - 13 Dec	AirAsia
11 Dec - 13 Dec	AirAsia
05 Dec - 13 Dec	AirAsia
11 Dec - 12 Dec	AirAsia
13 Dec - 02 Jan	AirAsia
19 Dec - 02 Jan	AirAsia

Also check the deals for one-way flights from Bandar Seri Begawan to Bangkok in December.

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 December from $368

Return flights