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

Return flights

12 Oct - 21 Oct	Air Canada
13 Oct - 21 Oct	Air Canada
04 Oct - 15 Oct	Air Canada
14 Oct - 21 Oct	Air Canada
21 Oct - 28 Oct	Delta
20 Oct - 30 Oct	Delta
15 Oct - 21 Oct	Delta
28 Oct - 04 Nov	Iberia
01 Oct - 22 Oct	Delta
01 Oct - 08 Oct	Delta
02 Oct - 07 Oct	Iberia
21 Oct - 15 Nov	British Airways
20 Oct - 15 Nov	British Airways
30 Oct - 06 Nov	Air France
29 Oct - 09 Nov	Delta
15 Oct - 15 Nov	Delta
23 Oct - 15 Nov	British Airways
30 Oct - 10 Nov	British Airways
16 Oct - 16 Nov	Air Canada
11 Oct - 01 Nov	British Airways

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

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 October from 381€

Return flights