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

Return flights

03 Dec - 10 Dec	Lufthansa
06 Dec - 12 Dec	Aer Lingus
09 Dec - 14 Dec	Air Transat
24 Dec - 20 Jan	Air Canada
04 Dec - 06 Dec	British Airways
14 Dec - 11 Jan	Scandinavian Airlines
24 Dec - 19 Jan	Air Canada
24 Dec - 17 Jan	Air Canada
04 Dec - 07 Dec	SWISS
14 Dec - 10 Jan	Scandinavian Airlines
27 Dec - 15 Jan	Lufthansa
27 Dec - 17 Jan	Lufthansa
28 Dec - 17 Jan	Lufthansa
05 Dec - 12 Dec	Lufthansa
25 Dec - 20 Jan	Lufthansa
01 Dec - 08 Dec	Lufthansa
14 Dec - 09 Jan	Scandinavian Airlines
05 Dec - 27 Dec	Air Canada
09 Dec - 16 Dec	Lufthansa
07 Dec - 14 Dec	Lufthansa

Also check the deals for one-way flights from Toronto 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 Toronto to Brussels in December from $550

Return flights