AirHint found the following cheapest return flights from Ontario (ONT) to Athens (ATH) in June 2026 (see full year).

Return flights

14 Jun - 02 Jul	Iberia
19 Jun - 22 Jun	Alaska Airlines
13 Jun - 25 Jun	British Airways
11 Jun - 25 Jun	Iberia
01 Jun - 15 Jun	Iberia
06 Jun - 15 Jun	Iberia
08 Jun - 22 Jun	Iberia
17 Jun - 29 Jun	Iberia
20 Jun - 11 Jul	British Airways
18 Jun - 24 Jun	Iberia
18 Jun - 12 Jul	Iberia
12 Jun - 20 Jun	Iberia
05 Jun - 14 Jun	Iberia

Also check the deals for one-way flights from Ontario to Athens 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 Athens in June from 1093€

Return flights