Cheapest return flights from Washington to Madrid in September from 581€

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

21 Sep - 30 Sep Royal Air Maroc
17 Sep - 30 Sep Royal Air Maroc
17 Sep - 30 Sep Finnair direct
21 Sep - 30 Sep Finnair direct
17 Sep - 24 Sep United
09 Sep - 21 Oct Turkish Airlines
11 Sep - 28 Sep Turkish Airlines
09 Sep - 21 Oct Finnair direct
07 Sep - 14 Sep United
27 Sep - 04 Oct United
11 Sep - 28 Sep Finnair 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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