AirHint found the following cheapest return flights from Ottawa (YOW) to Athens (ATH) in August 2025 (see full year).

Return flights

25 Aug - 09 Sep	Air France
26 Aug - 02 Sep	Porter Airlines (Canada) Ltd
21 Aug - 28 Aug	Porter Airlines (Canada) Ltd
18 Aug - 29 Aug	Porter Airlines (Canada) Ltd
11 Aug - 15 Aug	Porter Airlines (Canada) Ltd
15 Aug - 22 Aug	Porter Airlines (Canada) Ltd
06 Aug - 18 Aug	Condor
01 Aug - 04 Aug	Porter Airlines (Canada) Ltd

Also check the deals for one-way flights from Ottawa to Athens in August.

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 Ottawa to Athens in August from $753

Return flights