AirHint found the following cheapest one-way flights from Washington (IAD) to Madrid (MAD) in March 2026 (see full year).
One-Way flights
| 17 Mar | TAP | ||
| 04 Mar | TAP | ||
| 05 Mar | TAP | ||
| 12 Mar | TAP | ||
| 29 Mar | TAP | ||
| 17 Mar | Iberia | direct | |
| 25 Mar | Scandinavian Airlines | ||
| 12 Mar | Iberia | direct | |
| 05 Mar | British Airways | direct | |
| 29 Mar | United | direct |
Also check the deals for return flights from Washington to Madrid in March.
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