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

Return flights

06 Dec - 10 Dec	SWISS
02 Dec - 07 Dec	SWISS
10 Dec - 28 Dec	Air Dolomiti
01 Dec - 10 Dec	Lufthansa
05 Dec - 08 Dec	SWISS
02 Dec - 06 Dec	Virgin Atlantic
16 Dec - 06 Jan	Lufthansa
04 Dec - 15 Dec	Lufthansa
11 Dec - 13 Jan	Lufthansa
24 Dec - 12 Jan	Virgin Atlantic
24 Dec - 09 Jan	Virgin Atlantic
24 Dec - 10 Jan	Virgin Atlantic
11 Dec - 12 Jan	Lufthansa
24 Dec - 29 Dec	Lufthansa
10 Dec - 29 Dec	Lufthansa
10 Dec - 07 Jan	Lufthansa
09 Dec - 06 Jan	Lufthansa
11 Dec - 06 Jan	Lufthansa
02 Dec - 06 Jan	Lufthansa
06 Dec - 15 Dec	Virgin Atlantic

Also check the deals for one-way flights from London to Toronto 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 London to Toronto in December from 468€

Return flights