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

Return flights

05 Dec - 07 Dec	Indonesia AirAsia
05 Dec - 08 Dec	Indonesia AirAsia
06 Dec - 09 Dec	Philippines AirAsia Inc.
06 Dec - 09 Dec	Royal Brunei	direct
26 Dec - 13 Jan	AirAsia
23 Dec - 13 Jan	AirAsia
26 Dec - 11 Jan	AirAsia
22 Dec - 11 Jan	Thai AirAsia
23 Dec - 11 Jan	Thai AirAsia
26 Dec - 06 Jan	AirAsia
22 Dec - 06 Jan	Thai AirAsia
23 Dec - 06 Jan	Thai AirAsia
05 Dec - 14 Dec	Thai AirAsia
05 Dec - 15 Dec	Thai AirAsia
06 Dec - 14 Dec	Thai AirAsia
06 Dec - 15 Dec	Thai AirAsia
05 Dec - 11 Dec	Thai AirAsia
05 Dec - 10 Dec	Thai AirAsia
28 Dec - 13 Jan	Thai AirAsia
20 Dec - 06 Jan	AirAsia

Also check the deals for one-way flights from Bangkok to Bandar Seri Begawan 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 Bangkok to Bandar Seri Begawan in December from 255€

Return flights