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

Return flights

28 Oct - 08 Nov	Aer Lingus
29 Oct - 05 Nov	Aer Lingus
30 Oct - 03 Nov	Aer Lingus
31 Oct - 04 Nov	Aer Lingus
02 Oct - 13 Oct	Aer Lingus
04 Oct - 18 Oct	Aer Lingus
09 Oct - 23 Oct	Aer Lingus
08 Oct - 14 Oct	Aer Lingus
06 Oct - 10 Oct	Aer Lingus
06 Oct - 16 Oct	Aer Lingus
06 Oct - 12 Oct	Aer Lingus
02 Oct - 05 Oct	Aer Lingus
02 Oct - 06 Oct	Aer Lingus
08 Oct - 18 Oct	Aer Lingus
23 Oct - 05 Nov	Air Transat	direct
23 Oct - 05 Nov	SWISS
27 Oct - 04 Nov	Air Transat	direct
30 Oct - 07 Nov	Air Transat	direct
29 Oct - 05 Nov	Air Transat	direct
28 Oct - 02 Nov	Air Transat	direct

Also check the deals for one-way flights from London to Toronto in October.

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 October from $421

Return flights