AirHint found the following cheapest return flights from London (LGW) to Toronto (YYZ) in September 2026 (see full year).

Return flights

16 Sep - 30 Sep	Icelandair
16 Sep - 12 Oct	Icelandair
10 Sep - 01 Oct	Icelandair
09 Sep - 01 Oct	Icelandair
21 Sep - 01 Oct	Icelandair
22 Sep - 30 Sep	Icelandair
22 Sep - 06 Oct	Icelandair
20 Sep - 30 Sep	Icelandair
11 Sep - 24 Sep	Icelandair
14 Sep - 28 Sep	Icelandair
01 Sep - 14 Sep	Icelandair
01 Sep - 15 Sep	Icelandair
16 Sep - 22 Sep	Icelandair
21 Sep - 28 Sep	Icelandair
02 Sep - 09 Sep	Icelandair
15 Sep - 05 Oct	Icelandair
01 Sep - 06 Oct	Icelandair
24 Sep - 05 Oct	Icelandair
23 Sep - 14 Oct	Icelandair
21 Sep - 07 Oct	Icelandair

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

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 September from 399€

Return flights