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

Return flights

25 Sep - 28 Sep	Air Transat	direct
23 Sep - 30 Sep	Air Europa
25 Sep - 30 Sep	Air Canada
25 Sep - 03 Oct	Air Transat	direct
25 Sep - 01 Oct	Air Transat	direct
26 Sep - 30 Sep	Air Canada
24 Sep - 23 Oct	SWISS
23 Sep - 29 Sep	Air Europa
23 Sep - 28 Sep	Ryanair
22 Sep - 02 Oct	Ryanair
22 Sep - 28 Sep	Ryanair
25 Sep - 02 Oct	Air Canada
24 Sep - 02 Oct	Ryanair
21 Sep - 28 Sep	Iberia
21 Sep - 05 Oct	Air Europa
27 Sep - 30 Oct	Air Canada
22 Sep - 28 Sep	Air Transat	direct
21 Sep - 25 Sep	Iberia
24 Sep - 02 Oct	Air Canada	direct
24 Sep - 23 Oct	Lufthansa	direct

Also check the deals for one-way flights from Madrid 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 Madrid to Montreal in September from $518

Return flights