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

Return flights

19 Oct - 24 Oct	Air Canada
29 Oct - 07 Nov	Delta
19 Oct - 06 Nov	British Airways
27 Oct - 27 Nov	British Airways
08 Oct - 12 Oct	British Airways
19 Oct - 02 Nov	British Airways
30 Oct - 08 Nov	British Airways

Also check the deals for one-way flights from Washington to Barcelona 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 Barcelona in October from 398€

Return flights