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

Return flights

01 Dec - 09 Dec	Air Canada
08 Dec - 17 Dec	Air Canada
09 Dec - 16 Dec	United
08 Dec - 15 Dec	Air Canada
05 Dec - 12 Dec	Air Canada
01 Dec - 08 Dec	Air Canada
07 Dec - 14 Dec	British Airways
11 Dec - 18 Dec	Delta
10 Dec - 17 Dec	Air Canada
06 Dec - 13 Dec	jetBlue
31 Dec - 07 Jan	Scandinavian Airlines
28 Dec - 06 Jan	Air Canada
25 Dec - 17 Jan	Delta
24 Dec - 06 Jan	Air Canada
26 Dec - 01 Jan	Air Canada
12 Dec - 04 Jan	jetBlue
20 Dec - 06 Jan	Air Canada
28 Dec - 04 Jan	jetBlue
14 Dec - 04 Jan	jetBlue
17 Dec - 07 Jan	Finnair

Also check the deals for one-way flights from Washington to Barcelona in December.

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 December from 424€

Return flights