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

Return flights

05 Dec - 10 Dec	Hainan Airlines
21 Dec - 30 Dec	Qatar Airways
08 Dec - 13 Dec	Emirates
04 Dec - 16 Dec	Emirates
17 Dec - 24 Dec	Emirates
18 Dec - 24 Dec	Emirates
15 Dec - 15 Jan	SWISS
12 Dec - 24 Dec	Emirates
19 Dec - 28 Dec	Etihad Airways
18 Dec - 03 Jan	Finnair
19 Dec - 03 Jan	Etihad Airways
25 Dec - 02 Jan	Etihad Airways
18 Dec - 27 Dec	Qatar Airways
15 Dec - 12 Jan	SWISS
24 Dec - 04 Jan	KLM
18 Dec - 04 Jan	Etihad Airways
21 Dec - 04 Jan	Etihad Airways
23 Dec - 02 Jan	Emirates
20 Dec - 10 Jan	IndiGo
10 Dec - 21 Dec	Qatar Airways

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 544€

Return flights