Cheapest return flights from Washington to Brussels in December from $809

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

Return flights

29 Dec - 21 Jan Aer Lingus
25 Dec - 30 Dec SWISS
27 Dec - 01 Jan SWISS
29 Dec - 06 Jan Icelandair
28 Dec - 04 Jan TAP
25 Dec - 04 Jan SWISS
29 Dec - 21 Jan Brussels Airlines direct
25 Dec - 03 Jan Icelandair
27 Dec - 03 Jan Lufthansa
24 Dec - 03 Jan Lufthansa
25 Dec - 30 Dec Brussels Airlines direct
24 Dec - 03 Jan Brussels Airlines direct

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

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