AirHint found the following cheapest return flights from Dublin (DUB) to Toronto (YYZ) in September 2025 (see full year).

Return flights

10 Sep - 24 Sep	WestJet	direct
10 Sep - 21 Sep	WestJet	direct
10 Sep - 29 Sep	WestJet	direct
17 Sep - 05 Oct	WestJet
17 Sep - 21 Sep	WestJet
10 Sep - 17 Sep	WestJet
17 Sep - 01 Oct	WestJet
17 Sep - 29 Sep	WestJet
10 Sep - 06 Oct	WestJet
10 Sep - 05 Oct	WestJet
10 Sep - 13 Sep	WestJet	direct
11 Sep - 17 Sep	WestJet	direct
10 Sep - 30 Sep	WestJet
17 Sep - 30 Sep	WestJet
20 Sep - 01 Oct	WestJet
25 Sep - 04 Oct	WestJet	direct
25 Sep - 01 Oct	WestJet	direct
25 Sep - 08 Oct	WestJet	direct
25 Sep - 07 Oct	WestJet	direct
15 Sep - 08 Oct	Air Transat	direct

Also check the deals for one-way flights from Dublin to Toronto in September.

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 Dublin to Toronto in September from $299

Return flights