AirHint found the following cheapest one-way flights from Denver (DEN) to Madrid (MAD) in May 2026 (see full year).
One-Way flights
| 01 May | jetBlue | ||
| 07 May | Frontier Airlines | ||
| 20 May | Icelandair | ||
| 24 May | Frontier Airlines | ||
| 21 May | Frontier Airlines | ||
| 22 May | Air Canada | ||
| 28 May | Air Canada |
Also check the deals for return flights from Denver to Madrid in May.
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