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

Return flights

09 Sep - 27 Sep	Air Transat
12 Sep - 18 Sep	Air Transat
12 Sep - 19 Sep	Air Transat
09 Sep - 19 Sep	Air Transat
05 Sep - 16 Sep	Air Transat
10 Sep - 14 Sep	Air Transat
11 Sep - 05 Oct	Air Transat	direct
22 Sep - 29 Sep	Air Transat
11 Sep - 02 Oct	Air Transat
02 Sep - 14 Sep	Air Transat
04 Sep - 10 Sep	Norse Atlantic Airways
18 Sep - 21 Sep	Wizz Air UK
04 Sep - 17 Oct	Air Transat
18 Sep - 01 Oct	Ryanair
24 Sep - 22 Oct	Air Canada
24 Sep - 22 Oct	Lufthansa	direct

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 443€

Return flights