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

Return flights

26 Dec - 09 Jan	Etihad Airways
26 Dec - 24 Jan	Etihad Airways
25 Dec - 03 Jan	Etihad Airways
20 Dec - 04 Jan	Etihad Airways
03 Dec - 13 Dec	Qatar Airways
19 Dec - 03 Jan	Finnair
27 Dec - 04 Jan	Emirates
26 Dec - 09 Jan	Thai Airways	direct
26 Dec - 24 Jan	Thai Airways	direct
22 Dec - 29 Dec	IndiGo
25 Dec - 03 Jan	Thai Airways	direct
20 Dec - 04 Jan	Thai Airways	direct
20 Dec - 31 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 $713

Return flights