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

Return flights

05 Sep - 15 Sep	Air Transat
11 Sep - 18 Sep	Air Transat
05 Sep - 18 Sep	Air Transat
11 Sep - 16 Sep	Air Transat
05 Sep - 12 Sep	Air Transat
09 Sep - 16 Sep	Air Transat
12 Sep - 19 Sep	Air Transat
13 Sep - 20 Sep	Air Transat
10 Sep - 17 Sep	Air Transat
17 Sep - 24 Sep	Air Transat
24 Sep - 07 Oct	Vueling Airlines
27 Sep - 04 Oct	Air Transat
27 Sep - 09 Oct	Air Transat
29 Sep - 06 Oct	LOT
30 Sep - 07 Oct	LOT
24 Sep - 04 Oct	LOT
16 Sep - 18 Oct	LOT
30 Sep - 20 Oct	LOT
25 Sep - 02 Oct	easyJet
26 Sep - 03 Oct	Ryanair

Also check the deals for one-way flights from Athens to Toronto 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 Athens to Toronto in September from $515

Return flights