AirHint found the following cheapest return flights from Santander (SDR) to Luxemburg (LUX) in December 2025 (see full year).
Return flights
| 08 Dec - 12 Dec | Ryanair | ||
| 09 Dec - 13 Dec | Ryanair | ||
| 05 Dec - 08 Dec | Ryanair |
Also check the deals for one-way flights from Santander to Luxemburg in December.
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