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

Return flights

09 Sep - 30 Sep	ITA Airways
15 Sep - 29 Sep	ITA Airways
21 Sep - 05 Oct	ITA Airways
22 Sep - 29 Sep	ITA Airways
15 Sep - 22 Sep	ITA Airways
23 Sep - 01 Oct	ITA Airways
30 Sep - 07 Oct	ITA Airways
15 Sep - 20 Sep	SWISS
18 Sep - 27 Sep	SWISS
10 Sep - 20 Sep	SWISS
10 Sep - 16 Sep	SWISS
11 Sep - 20 Sep	SWISS
11 Sep - 19 Sep	SWISS
15 Sep - 03 Oct	SWISS
25 Sep - 09 Oct	SWISS
25 Sep - 02 Oct	SWISS
25 Sep - 12 Oct	SWISS
26 Sep - 03 Oct	SWISS
27 Sep - 10 Oct	SWISS
26 Sep - 11 Oct	SWISS

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 427€

Return flights