AirHint found the following cheapest one-way flights from Washington (IAD) to Madrid (MAD) in July 2026 (see full year).
One-Way flights
| 19 Jul | TAP | ||
| 28 Jul | TAP | ||
| 14 Jul | Lufthansa | ||
| 07 Jul | Lufthansa | ||
| 19 Jul | United | direct | |
| 08 Jul | United | direct | |
| 14 Jul | United | direct | |
| 07 Jul | United | direct | |
| 03 Jul | United | direct |
Also check the deals for return flights from Washington to Madrid in July.
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