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

Return flights

29 Dec - 04 Jan	AirAsia
30 Dec - 04 Jan	AirAsia
27 Dec - 04 Jan	AirAsia
29 Dec - 02 Jan	AirAsia
30 Dec - 02 Jan	AirAsia
27 Dec - 02 Jan	AirAsia
18 Dec - 04 Jan	Thai AirAsia
18 Dec - 02 Jan	Thai AirAsia
18 Dec - 24 Dec	Thai AirAsia
18 Dec - 27 Dec	Thai AirAsia
18 Dec - 19 Dec	Thai AirAsia
18 Dec - 26 Dec	Thai AirAsia
22 Dec - 04 Jan	Thai AirAsia
22 Dec - 02 Jan	Thai AirAsia
22 Dec - 24 Dec	Thai AirAsia
22 Dec - 27 Dec	Thai AirAsia
22 Dec - 26 Dec	Thai 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 438€

Return flights