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

Return flights

03 May - 10 May	TAP
05 May - 12 May	TAP
01 May - 08 May	TAP
01 May - 14 May	TAP
02 May - 14 May	TAP
03 May - 14 May	TAP
04 May - 14 May	TAP
05 May - 14 May	TAP
06 May - 14 May	TAP
07 May - 15 May	TAP
11 May - 11 Jun	Air Transat	direct
25 May - 01 Jun	Air Transat
27 May - 03 Jun	Air Transat
29 May - 05 Jun	Air Transat
31 May - 07 Jun	Air Transat
24 May - 15 Jun	Air Transat	direct
31 May - 15 Jun	Air Transat	direct
29 May - 16 Jun	Air Transat
25 May - 01 Jun	Air Transat	direct
12 May - 08 Jun	Azores Airlines

Also check the deals for one-way flights from Toronto to Porto 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 Toronto to Porto in May from $398

Return flights