AirHint found the following cheapest return flights from Montreal (YUL) to Dublin (DUB) in August 2025 (see full year).

Return flights

26 Aug - 02 Sep	FrenchBee
25 Aug - 12 Sep	FrenchBee
25 Aug - 01 Sep	TAP
31 Aug - 16 Sep	Porter Airlines (Canada) Ltd
20 Aug - 01 Sep	TAP
27 Aug - 01 Sep	TAP
27 Aug - 03 Sep	TAP
24 Aug - 09 Sep	WestJet
24 Aug - 08 Sep	TAP
27 Aug - 02 Sep	TAP
24 Aug - 31 Aug	TAP
13 Aug - 20 Aug	WestJet
14 Aug - 20 Aug	WestJet
16 Aug - 26 Aug	Porter Airlines (Canada) Ltd
19 Aug - 26 Aug	FrenchBee
18 Aug - 25 Aug	TAP
15 Aug - 21 Aug	Air Canada
14 Aug - 21 Aug	Air Canada
22 Aug - 29 Aug	Air Canada
23 Aug - 30 Aug	Air Canada

Also check the deals for one-way flights from Montreal to Dublin in August.

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 August from $616

Return flights