AirHint found the following cheapest return flights from Bangkok (BKK) to Brussels (BRU) in December 2025 (see full year).

Return flights

15 Dec - 15 Jan	Cathay Pacific
15 Dec - 13 Jan	Cathay Pacific
13 Dec - 31 Dec	Hainan Airlines
08 Dec - 12 Jan	Finnair
26 Dec - 08 Jan	Finnair
11 Dec - 08 Jan	Finnair
02 Dec - 10 Jan	Finnair
14 Dec - 11 Jan	Finnair
05 Dec - 08 Dec	Emirates
23 Dec - 03 Jan	Emirates
18 Dec - 03 Jan	Emirates
23 Dec - 07 Jan	Emirates
24 Dec - 31 Dec	Finnair
23 Dec - 27 Dec	Emirates
19 Dec - 28 Dec	Etihad Airways
05 Dec - 08 Dec	Thai Airways	direct
24 Dec - 31 Dec	Thai Airways	direct
20 Dec - 20 Dec	Emirates
19 Dec - 28 Dec	Thai Airways	direct
20 Dec - 27 Dec	Emirates

Also check the deals for one-way flights from Bangkok to Brussels 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 Brussels in December from $662

Return flights