The cheapest Luxembourg to Seoul return flight on the radar right now is €529, flying with Etihad Airways via one or more connections. It covers departures in November 2026, and every dated link below opens that exact LUX–ICN search on Skyscanner. At 41% under the €901 we normally record here, it is one of the strongest LUX–ICN fares in our index. Across 100 recorded checks it has ranged between €515 and €1,320. Our sampling points to November 2026 as the cheapest month to fly Luxembourg to Seoul.
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 62 other departure cities for Seoul, 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 Seoul is often still worth booking within a day or two of the fare we found.