AirHint found the following cheapest one-way flights from Washington (IAD) to Madrid (MAD) in May 2026 (see full year).
One-Way flights
| 08 May | Icelandair | ||
| 03 May | Icelandair | ||
| 17 May | Icelandair | ||
| 04 May | Icelandair | ||
| 15 May | Icelandair | ||
| 13 May | Icelandair | ||
| 06 May | TAP | ||
| 25 May | Icelandair | ||
| 31 May | Icelandair | ||
| 26 May | Icelandair |
Also check the deals for return flights from Washington to Madrid in May.
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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.
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