AirHint found the following cheapest return flights from Ontario (ONT) to Dublin (DUB) in June 2025 (see full year).

Return flights

26 Jun - 11 Jul	jetBlue
22 Jun - 08 Jul	jetBlue
23 Jun - 14 Jul	jetBlue
28 Jun - 13 Jul	Iberia
22 Jun - 07 Jul	jetBlue
30 Jun - 04 Jul	Iberia
29 Jun - 03 Jul	Iberia
22 Jun - 27 Jun	jetBlue
18 Jun - 06 Jul	jetBlue
20 Jun - 05 Jul	jetBlue
16 Jun - 18 Jun	Iberia
29 Jun - 13 Jul	jetBlue
16 Jun - 23 Jun	Iberia
17 Jun - 22 Jun	Iberia
18 Jun - 30 Jun	Iberia
20 Jun - 22 Jun	Iberia
19 Jun - 26 Jun	Iberia
15 Jun - 21 Jun	Iberia

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

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 Ontario to Dublin in June from $1161

Return flights