The cheapest Luxembourg to Reunion return flight on the radar right now is €869, flying with Luxair + Air Austral via one or more connections. It covers departures in January 2027, and every dated link below opens that exact LUX–RUN search on Skyscanner. Across 46 recorded checks it has ranged between €652 and €1,251. Our sampling points to January 2027 as the cheapest month to fly Luxembourg to Reunion.
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 46 other departure cities for Reunion, 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 Reunion is often still worth booking within a day or two of the fare we found.