AirHint found the following cheapest one-way flights from Washington (IAD) to Madrid (MAD) in August 2026 (see full year).
One-Way flights
| 20 Aug | TAP | ||
| 24 Aug | TAP | ||
| 17 Aug | TAP | ||
| 11 Aug | TAP | ||
| 05 Aug | TAP | ||
| 29 Aug | TAP | ||
| 05 Aug | United | direct | |
| 17 Aug | United | direct | |
| 24 Aug | United | direct | |
| 02 Aug | United | direct |
Also check the deals for return flights from Washington to Madrid in August.
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