Cheapest return flights from Ontario to Dublin in May from $635

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

Return flights

06 May - 11 May jetBlue
11 May - 22 May Iberia
11 May - 18 May Iberia
19 May - 02 Jun American Airlines
18 May - 25 May Iberia
20 May - 28 May Iberia
20 May - 29 May Iberia
14 May - 18 May Iberia
17 May - 24 May Iberia
29 May - 31 May Alaska Airlines

Also check the deals for one-way flights from Ontario to Dublin in May.

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