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

Return flights

30 Aug - 03 Sep	Air Transat
25 Aug - 08 Sep	United
27 Aug - 20 Sep	Aer Lingus
20 Aug - 27 Aug	SWISS
24 Aug - 21 Sep	KLM
12 Aug - 17 Aug	Air Transat
14 Aug - 17 Aug	Air Canada
28 Aug - 08 Sep	Air Canada
22 Aug - 25 Aug	Lufthansa
29 Aug - 31 Aug	TAP
14 Aug - 17 Aug	TAP	direct
14 Aug - 18 Aug	TAP	direct
13 Aug - 17 Aug	TAP	direct
25 Aug - 08 Sep	Lufthansa	direct
20 Aug - 30 Aug	Air Transat
14 Aug - 24 Aug	TAP	direct
21 Aug - 02 Sep	Air Canada	direct
24 Aug - 20 Sep	Ryanair
27 Aug - 20 Sep	TAP	direct
30 Aug - 03 Sep	TAP	direct

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 $593

Return flights