AirHint found the following cheapest return flights from Montreal (YUL) to Barcelona (BCN) in May 2026 (see full year).

Return flights

19 May - 26 May	British Airways
20 May - 27 May	British Airways
17 May - 27 May	Air France
05 May - 15 May	Air France
06 May - 13 May	Air France
08 May - 15 May	Air France
26 May - 02 Jun	British Airways
05 May - 12 May	Air France
17 May - 24 May	Air France
04 May - 11 May	Air France
18 May - 25 May	Air France
31 May - 07 Jun	British Airways
19 May - 01 Jun	British Airways
28 May - 04 Jun	British Airways
30 May - 06 Jun	Iberia
29 May - 05 Jun	British Airways
20 May - 13 Jun	FrenchBee
25 May - 01 Jun	Air Transat
19 May - 01 Jun	Air Transat	direct
25 May - 12 Jun	Air Transat

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

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 May from $524

Return flights