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

Return flights

31 Aug - 14 Sep	Air Transat
03 Aug - 10 Aug	Air Canada	direct
10 Aug - 17 Aug	Air Canada	direct
17 Aug - 24 Aug	Air Canada	direct
06 Aug - 13 Aug	Lufthansa
04 Aug - 11 Aug	Air Canada
05 Aug - 12 Aug	Air Canada
12 Aug - 26 Aug	Air Canada
11 Aug - 18 Aug	Air Canada
12 Aug - 19 Aug	Air Canada
13 Aug - 20 Aug	Air Canada
30 Aug - 06 Sep	WestJet
31 Aug - 07 Sep	Air Canada	direct
31 Aug - 14 Sep	Air Canada	direct
29 Aug - 05 Sep	WestJet
28 Aug - 04 Sep	Air Transat

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.

Book a cheap hotel in Dublin

Cheap car rent in Dublin

Cheapest return flights from Montreal to Dublin in August from 637€

Return flights