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

Return flights

23 Oct - 30 Oct	SWISS
13 Oct - 29 Oct	SWISS
13 Oct - 21 Oct	SWISS
13 Oct - 20 Oct	SWISS
09 Oct - 06 Nov	Lufthansa
25 Oct - 07 Nov	Lufthansa
16 Oct - 19 Oct	SWISS
09 Oct - 15 Oct	Lufthansa
06 Oct - 13 Oct	SWISS
09 Oct - 21 Nov	Lufthansa
18 Oct - 25 Oct	Brussels Airlines
11 Oct - 19 Oct	British Airways
02 Oct - 07 Oct	British Airways
25 Oct - 07 Nov	Air Transat	direct
09 Oct - 21 Nov	Air Transat	direct
26 Oct - 05 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 359€

Return flights