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

Return flights

04 Dec - 08 Dec	Icelandair
01 Dec - 05 Dec	Icelandair
08 Dec - 18 Jan	TAP
04 Dec - 10 Dec	Icelandair
02 Dec - 06 Dec	Icelandair
03 Dec - 11 Dec	TAP
05 Dec - 09 Dec	Icelandair
01 Dec - 11 Dec	TAP
04 Dec - 09 Dec	Icelandair
03 Dec - 08 Dec	Icelandair
02 Dec - 08 Dec	Icelandair
02 Dec - 31 Jan	TAP
05 Dec - 17 Jan	Flair Airlines
10 Dec - 13 Jan	Aer Lingus
31 Dec - 14 Jan	Aer Lingus
09 Dec - 17 Jan	Icelandair
06 Dec - 11 Jan	Icelandair
10 Dec - 11 Jan	Icelandair
30 Dec - 14 Jan	Aer Lingus
02 Dec - 07 Jan	Air Canada

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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Toronto to London in December from 440€

Return flights