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

Return flights

03 Dec - 24 Dec	Air Canada
02 Dec - 24 Dec	Air Canada
03 Dec - 12 Dec	Air Canada
03 Dec - 17 Dec	Air Canada
09 Dec - 17 Dec	Air Canada
10 Dec - 24 Dec	Air Canada
10 Dec - 17 Dec	Air Canada
24 Dec - 15 Jan	British Airways
02 Dec - 23 Dec	United
02 Dec - 18 Dec	Brussels Airlines
03 Dec - 18 Dec	Brussels Airlines
24 Dec - 08 Jan	British Airways
16 Dec - 12 Jan	British Airways
16 Dec - 11 Jan	Aer Lingus
10 Dec - 06 Jan	Air Canada
24 Dec - 17 Jan	British Airways
24 Dec - 10 Jan	British Airways
16 Dec - 06 Jan	Iberia
23 Dec - 13 Jan	Aer Lingus
22 Dec - 11 Jan	Aer Lingus

Also check the deals for one-way flights from Boston 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 Boston to Brussels in December from 317€

Return flights