AirHint found the following cheapest return flights from Las Vegas (LAS) to Barcelona (BCN) in December 2025 (see full year).
Return flights
| 10 Dec - 17 Dec | United | ||
| 17 Dec - 24 Dec | British Airways | ||
| 20 Dec - 25 Dec | Frontier Airlines | ||
| 19 Dec - 29 Dec | United |
Also check the deals for one-way flights from Las Vegas to Barcelona in December.
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