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

Return flights

05 Oct - 15 Oct	TAP
16 Oct - 21 Oct	TAP
16 Oct - 22 Oct	TAP
11 Oct - 20 Oct	TAP
15 Oct - 20 Oct	TAP
13 Oct - 20 Oct	TAP
16 Oct - 23 Oct	TAP
06 Oct - 20 Oct	TAP
30 Oct - 22 Nov	TAP
17 Oct - 22 Oct	TAP
22 Oct - 23 Nov	TAP
01 Oct - 08 Oct	TAP
20 Oct - 15 Nov	TAP
23 Oct - 15 Nov	TAP
14 Oct - 08 Nov	Air Canada
22 Oct - 23 Nov	Finnair	direct
30 Oct - 06 Nov	Aer Lingus
12 Oct - 01 Nov	TAP
11 Oct - 01 Nov	TAP
09 Oct - 02 Nov	TAP

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 299€

Return flights