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

Return flights

30 Oct - 04 Nov	SWISS
31 Oct - 04 Nov	SWISS
02 Oct - 15 Oct	SWISS
09 Oct - 19 Oct	Lufthansa
13 Oct - 19 Oct	SWISS
13 Oct - 21 Oct	SWISS
13 Oct - 23 Oct	SWISS
06 Oct - 15 Oct	SWISS
10 Oct - 19 Oct	SWISS
30 Oct - 14 Nov	SWISS
18 Oct - 27 Oct	SWISS
18 Oct - 25 Oct	Air Transat	direct
13 Oct - 17 Oct	Air Transat
30 Oct - 14 Nov	Air Transat	direct

Also check the deals for one-way flights from Porto to Toronto in October.

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 Toronto in October from $406

Return flights