AirHint found the following cheapest one-way flights from Washington (IAD) to Madrid (MAD) in August 2026 (see full year).
One-Way flights
| 23 Aug | Aer Lingus | ||
| 22 Aug | TAP | ||
| 03 Aug | Lufthansa | ||
| 16 Aug | Brussels Airlines | ||
| 02 Aug | TAP | ||
| 05 Aug | TAP | ||
| 08 Aug | TAP | ||
| 27 Aug | TAP | ||
| 03 Aug | United | direct | |
| 02 Aug | United | direct |
Also check the deals for return flights from Washington to Madrid in August.
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