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

Return flights

08 Mar - 15 Mar	TAP
03 Mar - 18 Mar	TAP
03 Mar - 13 Mar	TAP
24 Mar - 09 Apr	TAP
10 Mar - 02 Apr	TAP
23 Mar - 09 Apr	TAP
15 Mar - 22 Mar	TAP
03 Mar - 10 Mar	TAP
04 Mar - 18 Mar	TAP
02 Mar - 13 Mar	TAP
02 Mar - 18 Mar	TAP
04 Mar - 13 Mar	TAP
09 Mar - 02 Apr	TAP
10 Mar - 24 Mar	TAP
18 Mar - 08 Apr	TAP
30 Mar - 10 Apr	TAP
11 Mar - 01 Apr	TAP
11 Mar - 02 Apr	TAP
24 Mar - 14 Apr	TAP
17 Mar - 14 Apr	TAP

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

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 March from $322

Return flights