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

Return flights

31 Jul - 08 Aug	Delta
29 Jul - 09 Aug	Iberia
31 Jul - 03 Aug	Delta
31 Jul - 15 Aug	Iberia
30 Jul - 07 Aug	Iberia
30 Jul - 06 Aug	Iberia
27 Jul - 30 Jul	Iberia
27 Jul - 02 Aug	Iberia
30 Jul - 04 Aug	Iberia
28 Jul - 01 Aug	Iberia
25 Jul - 01 Aug	Iberia
22 Jul - 28 Jul	Iberia
25 Jul - 31 Jul	Iberia

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

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 July from 522€

Return flights