Cheapest return flights from Ontario to Athens in May from 558€

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

Return flights

08 May - 15 May Delta
04 May - 11 May Air Serbia
22 May - 29 May Iberia
24 May - 02 Jun British Airways
23 May - 30 May British Airways
29 May - 12 Jun British Airways
29 May - 11 Jun British Airways
30 May - 20 Jun Iberia
26 May - 09 Jun British Airways

Also check the deals for one-way flights from Ontario to Athens in May.

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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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