AirHint found the following cheapest return flights from Ontario (ONT) to Dublin (DUB) in September 2026 (see full year).
Return flights
| 02 Sep - 16 Sep | Iberia | ||
| 04 Sep - 11 Sep | British Airways | ||
| 15 Sep - 22 Sep | Iberia | ||
| 17 Sep - 28 Sep | British Airways | ||
| 25 Sep - 02 Oct | Iberia | ||
| 26 Sep - 03 Oct | Iberia | ||
| 20 Sep - 11 Oct | Iberia |
Also check the deals for one-way flights from Ontario to Dublin in September.
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