The cheapest Luxembourg to Rio de Janeiro return flight on the radar right now is €877, flying with Lufthansa via one or more connections. It covers departures in March 2027, and every dated link below opens that exact LUX–GIG search on Skyscanner. The price we usually record on this route is €842. Across 55 recorded checks it has ranged between €680 and €917. Our sampling points to March 2027 as the cheapest month to fly Luxembourg 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 Luxembourg? 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 Luxembourg to Rio de Janeiro is often still worth booking within a day or two of the fare we found.