Cheapest return flights from Washington to Madrid in September from $600

Best time to book flights for Washington (IAD) to Madrid (MAD) flights at AirHint

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

Return flights

03 Sep - 17 Sep Scandinavian Airlines
08 Sep - 25 Sep Turkish Airlines
23 Sep - 30 Sep United
03 Sep - 17 Sep Iberia direct
08 Sep - 25 Sep United direct
02 Sep - 09 Sep United
23 Sep - 30 Sep United direct
02 Sep - 09 Sep United direct

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

Skyscanner

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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