AirHint found the following cheapest return flights from Montreal (YUL) to Barcelona (BCN) in October 2025 (see full year).

Return flights

16 Oct - 08 Nov	Porter Airlines (Canada) Ltd
19 Oct - 08 Nov	Air Transat
17 Oct - 08 Nov	Air Transat
24 Oct - 15 Nov	Air Transat
23 Oct - 15 Nov	Air Transat
22 Oct - 15 Nov	FrenchBee
12 Oct - 24 Oct	Air Canada
12 Oct - 23 Oct	Air Canada
13 Oct - 23 Oct	Air Canada
13 Oct - 24 Oct	Air Canada
13 Oct - 08 Nov	FrenchBee
31 Oct - 22 Nov	Air Canada	direct
26 Oct - 15 Nov	FrenchBee
14 Oct - 21 Oct	Air Canada
26 Oct - 05 Nov	Air Canada	direct
12 Oct - 22 Oct	Air Canada
06 Oct - 21 Oct	Lufthansa
13 Oct - 21 Oct	Lufthansa
12 Oct - 21 Oct	Lufthansa
06 Oct - 16 Oct	Air Canada	direct

Also check the deals for one-way flights from Montreal to Barcelona in October.

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 Barcelona in October from $475

Return flights