The cheapest Porto to Miami return flight on the radar right now is €350, flying with TAP Air Portugal via one or more connections. It covers departures in November 2026, and every dated link below opens that exact OPO–MIA search on Skyscanner. That is roughly 23% below the €455 this route usually costs. Across 79 recorded checks it has ranged between €350 and €512. Our sampling points to November 2026 as the cheapest month to fly Porto to Miami.
We do not post a price and leave it to age. Each fare is re-checked against Skyscanner on a schedule and carries the time it was last confirmed. Not flying from Porto? We track 62 other departure cities for Miami, listed at the foot of this page.
Cheap fares do not hang around. If this one has already gone, nudge the dates either way by a day or two; Porto to Miami is usually still decent value around the same window.