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

Return flights

09 Mar - 16 Mar	TAP
08 Mar - 18 Mar	TAP
03 Mar - 17 Mar	Lufthansa
18 Mar - 25 Mar	Lufthansa
15 Mar - 24 Mar	Lufthansa
22 Mar - 08 Apr	Lufthansa
18 Mar - 24 Mar	Lufthansa
10 Mar - 24 Mar	Lufthansa
24 Mar - 14 Apr	Lufthansa
01 Mar - 10 Mar	Lufthansa
23 Mar - 30 Mar	Lufthansa
04 Mar - 11 Mar	Lufthansa
21 Mar - 07 Apr	Lufthansa
25 Mar - 01 Apr	Delta
20 Mar - 07 Apr	Lufthansa
25 Mar - 07 Apr	Air France
19 Mar - 06 Apr	ITA Airways
20 Mar - 06 Apr	Lufthansa
19 Mar - 05 Apr	TAP
22 Mar - 08 Apr	British Airways	direct

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 358€

Return flights