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

Return flights

18 May - 25 May	WestJet
04 May - 11 May	Air Transat
19 May - 26 May	Air Transat
05 May - 12 May	Air Transat
08 May - 15 May	Air Transat
17 May - 31 May	FrenchBee
17 May - 05 Jun	FrenchBee
06 May - 13 May	Air Canada
03 May - 10 May	WestJet
10 May - 17 May	WestJet
12 May - 19 May	Air Transat
25 May - 01 Jun	Air Canada	direct
18 May - 01 Jun	Air Canada	direct
18 May - 08 Jun	Air Canada	direct
27 May - 03 Jun	Air Canada
26 May - 02 Jun	Air Canada
28 May - 04 Jun	Air Canada
29 May - 08 Jun	Air Canada	direct
24 May - 09 Jun	Air Canada
29 May - 05 Jun	Air Canada

Also check the deals for one-way flights from Montreal to Dublin 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 Dublin in May from $475

Return flights