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

Return flights

11 Dec - 14 Dec	Scandinavian Airlines
02 Dec - 16 Dec	Turkish Airlines
05 Dec - 19 Dec	Turkish Airlines
24 Dec - 31 Dec	British Airways
23 Dec - 30 Dec	Air Canada
26 Dec - 06 Jan	British Airways
22 Dec - 30 Dec	Air Canada
23 Dec - 06 Jan	Brussels Airlines
23 Dec - 05 Jan	Brussels Airlines
23 Dec - 31 Dec	British Airways
19 Dec - 27 Dec	jetBlue
23 Dec - 01 Jan	Spirit Airlines
25 Dec - 03 Jan	British Airways
22 Dec - 05 Jan	Lufthansa
23 Dec - 04 Jan	United
20 Dec - 30 Dec	Virgin Atlantic
20 Dec - 02 Jan	Spirit Airlines
19 Dec - 30 Dec	British Airways

Also check the deals for one-way flights from Atlanta 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 Atlanta to Brussels in December from 476€

Return flights