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

Return flights

14 Dec - 09 Jan	Icelandair
16 Dec - 06 Jan	Icelandair
15 Dec - 06 Jan	Icelandair
06 Dec - 16 Dec	Icelandair
02 Dec - 05 Dec	Icelandair
16 Dec - 07 Jan	Icelandair
05 Dec - 09 Dec	Icelandair
03 Dec - 10 Dec	Icelandair
04 Dec - 14 Dec	Icelandair
01 Dec - 09 Dec	Icelandair
16 Dec - 13 Jan	Icelandair
09 Dec - 08 Jan	Icelandair
12 Dec - 06 Jan	Icelandair
02 Dec - 06 Dec	Icelandair
05 Dec - 13 Dec	Icelandair
01 Dec - 11 Dec	Icelandair
04 Dec - 11 Dec	Icelandair
13 Dec - 07 Jan	Icelandair
24 Dec - 11 Jan	TAP
12 Dec - 05 Jan	TAP

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.

Book a cheap hotel in Toronto

Cheap car rent in Toronto

Cheapest return flights from London to Toronto in December from $411

Return flights