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

Return flights

19 Aug - 26 Aug	Air Canada
19 Aug - 27 Aug	Air France
12 Aug - 19 Aug	Iberia
13 Aug - 20 Aug	Iberia
03 Aug - 08 Sep	Delta
20 Aug - 07 Sep	Air Canada
18 Aug - 25 Aug	British Airways
20 Aug - 26 Aug	British Airways
31 Aug - 14 Sep	Air Canada
22 Aug - 27 Aug	British Airways
15 Aug - 23 Aug	Air Canada
14 Aug - 23 Aug	British Airways
22 Aug - 26 Aug	British Airways
30 Aug - 06 Sep	Air France
25 Aug - 01 Sep	Delta
31 Aug - 07 Sep	United
28 Aug - 04 Sep	Iberia
28 Aug - 01 Sep	Air Canada

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

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 August from $377

Return flights