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

Return flights

01 Dec - 08 Dec	KLM
03 Dec - 10 Dec	KLM
05 Dec - 12 Dec	KLM
08 Dec - 14 Dec	British Airways
09 Dec - 16 Dec	British Airways
02 Dec - 09 Dec	British Airways
04 Dec - 11 Dec	British Airways
08 Dec - 15 Dec	British Airways
06 Dec - 13 Dec	British Airways
08 Dec - 14 Dec	Air Canada	direct
13 Dec - 08 Jan	Air Canada
13 Dec - 08 Jan	Lufthansa	direct
26 Dec - 03 Jan	Brussels Airlines
25 Dec - 01 Jan	British Airways
29 Dec - 05 Jan	British Airways
30 Dec - 06 Jan	British Airways
27 Dec - 04 Jan	British Airways
28 Dec - 04 Jan	British Airways
17 Dec - 11 Jan	TAP
17 Dec - 11 Jan	Air Canada	direct

Also check the deals for one-way flights from Montreal 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 Montreal to Brussels in December from $577

Return flights