AirHint found the following cheapest return flights from Washington (DCA) to Madrid (MAD) in May 2026 (see full year).

Return flights

03 May - 20 May	jetBlue
04 May - 15 May	British Airways
01 May - 09 May	jetBlue
12 May - 19 May	jetBlue
01 May - 10 May	jetBlue
01 May - 05 May	jetBlue
15 May - 17 May	jetBlue
19 May - 03 Jun	Iberia
12 May - 17 May	Air France
14 May - 25 May	jetBlue
19 May - 25 May	Virgin Atlantic
27 May - 03 Jun	Iberia
25 May - 10 Jun	Iberia
21 May - 02 Jun	British Airways
28 May - 01 Jun	jetBlue
28 May - 13 Jun	Air Canada

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

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 May from $521

Return flights