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

Return flights

04 Dec - 09 Dec	Icelandair
04 Dec - 11 Dec	Icelandair
05 Dec - 12 Dec	Icelandair
01 Dec - 07 Dec	Icelandair
01 Dec - 09 Dec	Icelandair
02 Dec - 07 Dec	Icelandair
07 Dec - 13 Dec	TAP
03 Dec - 08 Dec	Icelandair
04 Dec - 14 Dec	Air Transat
03 Dec - 10 Dec	Icelandair
28 Dec - 12 Jan	Aer Lingus
29 Dec - 12 Jan	Aer Lingus
31 Dec - 08 Jan	Aer Lingus
11 Dec - 19 Jan	Aer Lingus
11 Dec - 18 Jan	Aer Lingus
11 Dec - 08 Jan	Aer Lingus
30 Dec - 13 Jan	Scandinavian Airlines
27 Dec - 08 Jan	Aer Lingus
28 Dec - 17 Jan	Aer Lingus
12 Dec - 18 Jan	Air Transat

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 352€

Return flights