The cheapest Porto to Toronto return flight on the radar right now is €393, flying with TAP Air Portugal via one or more connections. It covers departures in March 2027, and every dated link below opens that exact OPO–YYZ search on Skyscanner. The price we usually record on this route is €434. Across 91 recorded checks it has ranged between €350 and €486. Our sampling points to March 2027 as the cheapest month to fly Porto to Toronto.
Every fare here is re-confirmed against Skyscanner automatically, and each one is stamped with the moment it was last checked, so you can see how fresh it is instead of taking it on trust. Not flying from Porto? We track 59 other departure cities for Toronto, listed at the foot of this page.
Fares move quickly. If this Porto to Toronto price has gone by the time you search, shift the dates a day or two either side, because the same route is often still cheap just next door.