Cheapest return flights from Ontario to Dublin in September from $644

Best time to book flights for Ontario (ONT) to Dublin (DUB) flights at AirHint

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

Return flights

02 Sep - 09 Sep Iberia
09 Sep - 16 Sep Iberia
30 Sep - 07 Oct Iberia
04 Sep - 11 Sep Iberia
08 Sep - 15 Sep Iberia
04 Sep - 18 Sep Iberia
07 Sep - 14 Sep Iberia
29 Sep - 13 Oct Iberia
06 Sep - 13 Sep Iberia
05 Sep - 12 Sep Iberia
25 Sep - 11 Oct Iberia
17 Sep - 20 Sep Iberia

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

Skyscanner

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.

Book a cheap hotel in Dublin

Cheap car rent in Dublin