The cheapest Madrid to Rio de Janeiro return flight on the radar right now is €655, flying with Iberia non-stop. It covers departures in April 2027, and every dated link below opens that exact MAD–GIG search on Skyscanner. The price we usually record on this route is €705. Across 98 recorded checks it has ranged between €558 and €969. Our sampling points to April 2027 as the cheapest month to fly Madrid to Rio de Janeiro.
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 Madrid? We track 63 other departure cities for Rio de Janeiro, 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 Madrid to Rio de Janeiro is often still worth booking within a day or two of the fare we found.