AirHint found the following cheapest return flights from Porto (OPO) to Montreal (YUL) in August 2026 (see full year).

Return flights

25 Aug - 03 Sep	Air Transat	direct
26 Aug - 03 Sep	Air Transat	direct
25 Aug - 04 Sep	Air Transat
02 Aug - 15 Aug	Air Transat	direct
02 Aug - 18 Aug	Air Transat	direct
23 Aug - 03 Sep	Air Transat	direct
26 Aug - 07 Sep	SWISS
24 Aug - 03 Sep	Lufthansa
02 Aug - 19 Aug	Air Transat
27 Aug - 08 Sep	Air Canada
16 Aug - 28 Aug	Air Canada	direct
15 Aug - 05 Sep	Lufthansa
02 Aug - 19 Aug	Air Canada	direct

Also check the deals for one-way flights from Porto to Montreal 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 Porto to Montreal in August from $492

Return flights