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

Return flights

21 Sep - 30 Sep	Icelandair
25 Sep - 04 Oct	Icelandair
18 Sep - 17 Oct	Icelandair
23 Sep - 30 Sep	Icelandair
20 Sep - 30 Sep	Icelandair
18 Sep - 30 Sep	Icelandair
18 Sep - 02 Oct	Icelandair
28 Sep - 07 Oct	Icelandair
16 Sep - 07 Oct	Icelandair
19 Sep - 30 Sep	Icelandair
11 Sep - 20 Sep	Icelandair
10 Sep - 18 Sep	Icelandair
09 Sep - 13 Sep	Icelandair
01 Sep - 15 Sep	Icelandair
21 Sep - 28 Sep	Icelandair
13 Sep - 04 Oct	Air Canada
23 Sep - 21 Oct	Icelandair
22 Sep - 21 Oct	Icelandair
25 Sep - 04 Oct	Air Canada	direct
13 Sep - 04 Oct	Air Canada	direct

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 345€

Return flights