AirHint found the following cheapest return flights from Lisbon (LIS) to Toronto (YTZ) in August 2025 (see full year).

Return flights

28 Aug - 08 Sep	SWISS
25 Aug - 11 Sep	Air Transat
30 Aug - 13 Sep	Air Transat
14 Aug - 20 Aug	Air Transat
14 Aug - 17 Aug	Air Transat
07 Aug - 10 Sep	Air Transat
18 Aug - 25 Aug	Air Transat
04 Aug - 11 Aug	Air Transat
23 Aug - 30 Aug	Air Transat
01 Aug - 11 Aug	Air Canada
14 Aug - 21 Aug	Air Transat
22 Aug - 25 Aug	Vueling Airlines
27 Aug - 31 Aug	Air Canada
15 Aug - 25 Aug	SWISS
02 Aug - 02 Sep	Azores Airlines
13 Aug - 03 Sep	Air Transat
13 Aug - 02 Sep	Air Transat
15 Aug - 02 Sep	SWISS
31 Aug - 07 Sep	Emirates

Also check the deals for one-way flights from Lisbon to Toronto 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 Lisbon to Toronto in August from 459€

Return flights