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

Return flights

31 Dec - 19 Jan	Air Canada
29 Dec - 12 Jan	Air Canada
30 Dec - 12 Jan	Air Canada
30 Dec - 08 Jan	Air Canada
26 Dec - 25 Jan	Air Canada
26 Dec - 11 Jan	Air Canada
30 Dec - 21 Jan	Air Canada	direct
29 Dec - 17 Jan	Air Canada
29 Dec - 19 Jan	Air Canada
30 Dec - 20 Jan	Lufthansa	direct
26 Dec - 28 Dec	Iberia
23 Dec - 28 Dec	Iberia
22 Dec - 29 Dec	Air Canada
24 Dec - 29 Dec	Air Canada
24 Dec - 28 Dec	Air France
25 Dec - 30 Dec	KLM
23 Dec - 29 Dec	Finnair
24 Dec - 25 Dec	WestJet
23 Dec - 26 Dec	TAP
24 Dec - 25 Dec	Air Canada	direct

Also check the deals for one-way flights from Toronto to London 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 London in December from 562€

Return flights