Cheapest one-way flights from Washington to Madrid in March from $339

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

One-Way flights

16 Mar TAP
30 Mar TAP
17 Mar Icelandair
21 Mar Frontier Airlines
22 Mar Allegiant Air
24 Mar Frontier Airlines
15 Mar British Airways
11 Mar British Airways
19 Mar Frontier Airlines
29 Mar Porter Airlines (Canada) Ltd

Also check the deals for return flights from Washington to Madrid in March.

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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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