Cheapest return flights from Washington to Madrid in September from 363€

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

Return flights

23 Sep - 30 Sep Finnair direct
16 Sep - 01 Oct British Airways
08 Sep - 17 Sep Iberia
16 Sep - 01 Oct Aer Lingus direct
08 Sep - 17 Sep Aer Lingus direct
05 Sep - 14 Sep TAP
05 Sep - 14 Sep Finnair direct

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

Powered by

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.

Book a cheap hotel in Madrid

Cheap car rent in Madrid

Feel free to contact us with any feedback or request another flight research.