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

Return flights

31 Aug - 07 Sep	Air Transat
29 Aug - 12 Sep	Air France
22 Aug - 07 Sep	Air Transat
20 Aug - 07 Sep	Air Transat
20 Aug - 03 Sep	Air Transat
28 Aug - 07 Sep	Air Transat
31 Aug - 06 Sep	WestJet
22 Aug - 06 Sep	WestJet
22 Aug - 08 Sep	WestJet
21 Aug - 06 Sep	TAP
06 Aug - 13 Aug	Air Transat
17 Aug - 26 Aug	Air Transat
18 Aug - 27 Aug	Air Transat
23 Aug - 26 Aug	Air Transat
22 Aug - 29 Aug	Air Transat
09 Aug - 13 Aug	Air Transat
10 Aug - 20 Aug	Air Transat
09 Aug - 20 Aug	Air Transat
08 Aug - 15 Aug	Air Transat
15 Aug - 29 Aug	Air Transat

Also check the deals for one-way flights from Toronto to Porto 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 Porto in August from 536€

Return flights