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

Return flights

26 Aug - 09 Sep	WestJet
04 Aug - 18 Aug	Air Canada
06 Aug - 28 Aug	Finnair
19 Aug - 26 Aug	WestJet
07 Aug - 28 Aug	Finnair
11 Aug - 18 Aug	Finnair
07 Aug - 04 Sep	Finnair
06 Aug - 22 Aug	WestJet
25 Aug - 03 Sep	Finnair
06 Aug - 29 Aug	Air Transat
18 Aug - 17 Sep	Air Transat
18 Aug - 03 Sep	Air Transat
31 Aug - 14 Sep	WestJet
07 Aug - 26 Sep	Finnair
20 Aug - 27 Aug	WestJet
18 Aug - 27 Aug	WestJet
19 Aug - 27 Aug	WestJet
31 Aug - 13 Sep	Air Transat
02 Aug - 02 Sep	American Airlines
18 Aug - 12 Sep	WestJet

Also check the deals for one-way flights from Calgary 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 Calgary to Dublin in August from 450€

Return flights