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

Return flights

31 Dec - 24 Jan	Scandinavian Airlines
09 Dec - 10 Jan	Scandinavian Airlines
09 Dec - 16 Dec	jetBlue
31 Dec - 11 Jan	Scandinavian Airlines
29 Dec - 21 Jan	Scandinavian Airlines
11 Dec - 18 Dec	jetBlue
07 Dec - 16 Dec	jetBlue
12 Dec - 21 Dec	jetBlue
02 Dec - 09 Dec	Iberia
11 Dec - 21 Dec	Icelandair
31 Dec - 06 Jan	British Airways
16 Dec - 10 Jan	United
16 Dec - 06 Jan	United
25 Dec - 30 Dec	Scandinavian Airlines
23 Dec - 30 Dec	Frontier Airlines
26 Dec - 03 Jan	jetBlue
19 Dec - 27 Dec	WestJet
22 Dec - 06 Jan	Delta
23 Dec - 05 Jan	United
20 Dec - 31 Dec	Air Canada

Also check the deals for one-way flights from Washington to Brussels 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 Brussels in December from 489€

Return flights