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

Return flights

23 Oct - 30 Oct	Air Canada
28 Oct - 16 Nov	Air Canada
05 Oct - 25 Oct	Air Canada
15 Oct - 23 Oct	Delta
01 Oct - 08 Oct	Delta
12 Oct - 22 Oct	Delta
31 Oct - 03 Nov	United
17 Oct - 25 Oct	Air Canada
24 Oct - 29 Oct	Air Canada
02 Oct - 10 Oct	Delta
30 Oct - 02 Nov	Delta
17 Oct - 26 Oct	Air Canada
01 Oct - 05 Oct	jetBlue
11 Oct - 01 Nov	Air Canada
17 Oct - 01 Nov	Air Canada
31 Oct - 02 Nov	Air Canada
13 Oct - 08 Nov	British Airways
19 Oct - 08 Nov	British Airways
08 Oct - 01 Nov	Air Canada
26 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 403€

Return flights