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

Return flights

10 Dec - 17 Dec	Air Canada
08 Dec - 15 Dec	Air Canada
09 Dec - 16 Dec	jetBlue
01 Dec - 08 Dec	Air Canada
03 Dec - 10 Dec	Air Canada
05 Dec - 12 Dec	Air Canada
02 Dec - 09 Dec	Air France
11 Dec - 18 Dec	United
01 Dec - 05 Dec	United
04 Dec - 11 Dec	jetBlue
25 Dec - 04 Jan	Scandinavian Airlines
12 Dec - 25 Jan	British Airways
23 Dec - 01 Jan	British Airways
20 Dec - 04 Jan	Scandinavian Airlines
24 Dec - 02 Jan	British Airways
25 Dec - 02 Jan	British Airways
08 Dec - 03 Jan	British Airways
21 Dec - 02 Jan	Icelandair
17 Dec - 04 Jan	Air Canada
30 Dec - 03 Jan	British Airways

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 376€

Return flights