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

Return flights

26 Oct - 14 Nov	Air Canada
07 Oct - 24 Oct	Iberia
05 Oct - 14 Oct	Iberia
15 Oct - 22 Oct	Delta
06 Oct - 22 Oct	Delta
11 Oct - 21 Oct	Air Canada
04 Oct - 15 Oct	Air Canada
20 Oct - 30 Oct	Air Canada
07 Oct - 14 Oct	Air Canada
06 Oct - 16 Oct	Air Canada
06 Oct - 15 Oct	Air Canada
28 Oct - 04 Nov	Iberia
26 Oct - 15 Nov	British Airways
30 Oct - 06 Nov	KLM
24 Oct - 15 Nov	British Airways
11 Oct - 01 Nov	Air Canada
12 Oct - 01 Nov	British Airways
26 Oct - 02 Nov	Iberia

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 $423

Return flights