AirHint found the following cheapest one-way flights from Washington (IAD) to Valencia (VLC) in December 2025 (see full year).
One-Way flights
| 09 Dec | TAP | ||
| 12 Dec | Frontier Airlines | ||
| 10 Dec | SWISS | ||
| 21 Dec | Delta |
Also check the deals for return flights from Washington to Valencia in December.
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