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

Return flights

09 Dec - 17 Dec	United
03 Dec - 13 Dec	Air Canada
03 Dec - 07 Dec	Air Canada
07 Dec - 14 Dec	United
28 Dec - 19 Jan	British Airways
31 Dec - 22 Jan	British Airways
17 Dec - 24 Dec	United
14 Dec - 27 Dec	Air Canada
13 Dec - 20 Dec	United
14 Dec - 21 Dec	British Airways
10 Dec - 20 Dec	British Airways
24 Dec - 31 Dec	Air Canada
27 Dec - 03 Jan	United
21 Dec - 03 Jan	Air Canada
20 Dec - 02 Jan	jetBlue

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.

Book a cheap hotel in Barcelona

Cheap car rent in Barcelona

Cheapest return flights from Washington to Barcelona in December from $474

Return flights