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

Return flights

15 Oct - 05 Nov	TAP
01 Oct - 08 Oct	TAP
17 Oct - 25 Oct	TAP
01 Oct - 22 Oct	FrenchBee
06 Oct - 09 Oct	Air Transat	direct
01 Oct - 09 Oct	Air Transat	direct
01 Oct - 07 Oct	Air Transat	direct
22 Oct - 05 Nov	FrenchBee
01 Oct - 06 Oct	Air Transat	direct
01 Oct - 08 Oct	Air Transat	direct
04 Oct - 18 Oct	Air Transat
01 Oct - 16 Oct	Air Canada	direct
29 Oct - 26 Nov	FrenchBee
29 Oct - 05 Nov	FrenchBee
26 Oct - 21 Nov	FrenchBee
29 Oct - 09 Nov	FrenchBee
26 Oct - 14 Nov	FrenchBee
24 Oct - 07 Nov	FrenchBee
31 Oct - 21 Nov	FrenchBee
07 Oct - 02 Nov	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 $442

Return flights