AirHint found the following cheapest return flights from Toronto (YYZ) to Athens (ATH) in September 2025 (see full year).

Return flights

14 Sep - 25 Sep	Air Transat
14 Sep - 22 Sep	Air Transat
17 Sep - 26 Sep	WestJet
07 Sep - 17 Sep	Flair Airlines
10 Sep - 22 Sep	Air Transat
10 Sep - 17 Sep	Air Transat
07 Sep - 15 Sep	Flair Airlines
07 Sep - 16 Sep	Flair Airlines
03 Sep - 15 Sep	Porter Airlines (Canada) Ltd
02 Sep - 16 Sep	Flair Airlines
22 Sep - 22 Oct	WestJet
28 Sep - 08 Oct	Air Transat
22 Sep - 09 Oct	WestJet
30 Sep - 15 Oct	Air Transat
30 Sep - 16 Oct	Air Transat
29 Sep - 13 Oct	WestJet
13 Sep - 13 Oct	Air Transat
27 Sep - 15 Oct	ITA Airways
25 Sep - 15 Oct	ITA Airways
23 Sep - 10 Oct	ITA Airways

Also check the deals for one-way flights from Toronto to Athens in September.

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 Toronto to Athens in September from $577

Return flights