The cheapest Porto to Madagascar return flight on the radar right now is €1,010, flying with Turkish Airlines via one or more connections. It covers departures in January 2027, and every dated link below opens that exact OPO–TNR search on Skyscanner. That is roughly 10% below the €1,126 this route usually costs. Across 59 recorded checks it has ranged between €981 and €1,344. Our sampling points to January 2027 as the cheapest month to fly Porto to Madagascar.
Prices are re-checked against Skyscanner automatically, and every one shows when it was last confirmed, so nothing here is older than it looks. Not flying from Porto? We track 53 other departure cities for Madagascar, listed at the foot of this page.
Prices like this tend to vanish fast. If it has gone when you look, try the days either side of the dates above, since Porto to Madagascar is often still worth booking within a day or two of the fare we found.