AirHint found the following cheapest return flights from Washington (IAD) to Madrid (MAD) in July 2025 (see full year).

Return flights

18 Jul - 23 Aug	KLM
28 Jul - 06 Aug	KLM
29 Jul - 06 Aug	Delta
21 Jul - 13 Aug	Lufthansa
15 Jul - 22 Jul	Lufthansa
27 Jul - 07 Aug	United	direct
14 Jul - 21 Jul	ITA Airways
15 Jul - 21 Jul	ITA Airways
23 Jul - 28 Jul	Lufthansa
16 Jul - 23 Jul	Air Canada
26 Jul - 07 Aug	United
15 Jul - 23 Jul	Air France
15 Jul - 24 Jul	ITA Airways
16 Jul - 24 Jul	Lufthansa
23 Jul - 27 Jul	Air France
28 Jul - 05 Aug	Lufthansa
23 Jul - 04 Aug	KLM
29 Jul - 05 Aug	Air France
21 Jul - 31 Jul	Delta
24 Jul - 10 Aug	Lufthansa

Also check the deals for one-way flights from Washington to Madrid in July.

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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Cheapest return flights from Washington to Madrid in July from 466€

Return flights