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

Return flights

30 Dec - 18 Jan	Lufthansa
30 Dec - 22 Jan	Lufthansa
30 Dec - 19 Jan	Lufthansa
30 Dec - 17 Jan	Air Canada
27 Dec - 18 Jan	Lufthansa
27 Dec - 13 Jan	Lufthansa
27 Dec - 31 Jan	Lufthansa
29 Dec - 14 Jan	Air Canada
30 Dec - 11 Jan	Lufthansa
30 Dec - 07 Jan	Lufthansa
27 Dec - 29 Dec	Lufthansa
27 Dec - 31 Dec	Lufthansa
27 Dec - 30 Dec	Lufthansa
28 Dec - 30 Dec	Air Canada
27 Dec - 31 Dec	Air Canada	direct
28 Dec - 31 Dec	Lufthansa
28 Dec - 30 Dec	Air Canada	direct
28 Dec - 31 Dec	Air Canada	direct
27 Dec - 30 Dec	Air Canada	direct
31 Dec - 31 Dec	Air Canada

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 438€

Return flights