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

Return flights

22 Sep - 29 Sep	Air Canada
18 Sep - 23 Sep	Air Canada
18 Sep - 24 Sep	Air Canada	direct
28 Sep - 24 Oct	Air Canada
21 Sep - 19 Oct	Air Canada
25 Sep - 29 Sep	SWISS
30 Sep - 09 Oct	Lufthansa
25 Sep - 05 Oct	SWISS
21 Sep - 20 Oct	Lufthansa
21 Sep - 21 Oct	Lufthansa
21 Sep - 22 Oct	Lufthansa
21 Sep - 23 Oct	Lufthansa
18 Sep - 26 Sep	Air Canada	direct
18 Sep - 23 Sep	Air Canada	direct
18 Sep - 25 Sep	Air Canada	direct
28 Sep - 05 Oct	Air Canada	direct
21 Sep - 19 Oct	Air Canada	direct
21 Sep - 28 Sep	Air Canada
19 Sep - 29 Sep	Air Canada
20 Sep - 27 Sep	Air Canada

Also check the deals for one-way flights from Brussels to Montreal in September.

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 Brussels to Montreal in September from $510

Return flights