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

Return flights

31 Aug - 07 Sep	WestJet
28 Aug - 08 Sep	WestJet
30 Aug - 06 Sep	WestJet
30 Aug - 10 Sep	Air Transat
27 Aug - 04 Sep	Air Transat	direct
26 Aug - 11 Sep	TAP	direct
26 Aug - 11 Sep	Air Transat
04 Aug - 25 Sep	Air Transat	direct
25 Aug - 04 Sep	Air Transat
26 Aug - 09 Sep	TAP	direct
23 Aug - 28 Aug	Delta
17 Aug - 24 Aug	WestJet
10 Aug - 20 Aug	Air Transat
18 Aug - 20 Aug	Air Transat
09 Aug - 20 Aug	Air Transat
08 Aug - 20 Aug	Air Transat
21 Aug - 28 Aug	WestJet
05 Aug - 20 Aug	WestJet
25 Aug - 28 Aug	TAP
17 Aug - 26 Aug	Air Transat

Also check the deals for one-way flights from Toronto to Lisbon 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 Toronto to Lisbon in August from 392€

Return flights