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

One-Way flights

10 Sep	FrenchBee
21 Sep	Porter Airlines (Canada) Ltd
02 Sep	Air Transat
08 Sep	FrenchBee
09 Sep	Porter Airlines (Canada) Ltd
12 Sep	FrenchBee
02 Sep	Air Transat	direct
21 Sep	Air Transat	direct
09 Sep	Air Transat	direct
07 Sep	Air Transat	direct

Also check the deals for return flights from Montreal to Brussels 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 one-way flights from Montreal to Brussels in September from 272€

One-Way flights