AirHint found the following cheapest one-way flights from Ontario (ONT) to Dublin (DUB) in May 2026 (see full year).
One-Way flights
| 25 May | Frontier Airlines | ||
| 08 May | Alaska Airlines | ||
| 02 May | Frontier Airlines | ||
| 30 May | Air Canada | ||
| 04 May | Iberia | ||
| 03 May | Iberia | ||
| 11 May | Iberia | ||
| 09 May | Iberia | ||
| 31 May | Iberia | ||
| 21 May | jetBlue |
Also check the deals for return flights from Ontario to Dublin in May.
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