AirHint found the following cheapest return flights from Porto (OPO) to Toronto (YYZ) in May 2026 (see full year).

Return flights

09 May - 12 May	Lufthansa
14 May - 24 May	SWISS
19 May - 29 May	Lufthansa
07 May - 10 May	SWISS
02 May - 09 May	Lufthansa
14 May - 24 May	Air Transat	direct
18 May - 27 May	Air Transat	direct
04 May - 11 May	Air Transat	direct
26 May - 10 Jun	Air Transat
07 May - 10 May	Air Transat	direct
05 May - 15 May	Lufthansa
28 May - 13 Jun	Azores Airlines

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

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 May from $408

Return flights