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

Return flights

10 Dec - 13 Jan	TAP
06 Dec - 11 Jan	TAP
06 Dec - 10 Dec	Icelandair
06 Dec - 07 Dec	Icelandair
05 Dec - 09 Dec	Icelandair
03 Dec - 07 Dec	Icelandair
04 Dec - 08 Dec	Icelandair
03 Dec - 06 Dec	Icelandair
04 Dec - 09 Dec	Icelandair
03 Dec - 09 Dec	Icelandair
06 Dec - 09 Dec	Icelandair
06 Dec - 08 Dec	Icelandair
24 Dec - 25 Jan	TAP
03 Dec - 12 Jan	Lufthansa
04 Dec - 29 Jan	Icelandair
16 Dec - 15 Jan	Icelandair
24 Dec - 11 Jan	TAP
04 Dec - 31 Jan	Aer Lingus
11 Dec - 11 Jan	TAP
04 Dec - 30 Jan	Lufthansa

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 $457

Return flights