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

Return flights

22 Sep - 06 Oct	SWISS
17 Sep - 28 Sep	Lufthansa
14 Sep - 21 Sep	SWISS
10 Sep - 22 Sep	SWISS
24 Sep - 07 Oct	Air Dolomiti
22 Sep - 29 Sep	SWISS
14 Sep - 28 Sep	SWISS
21 Sep - 30 Sep	SWISS
01 Sep - 29 Sep	Lufthansa
01 Sep - 22 Sep	Lufthansa
01 Sep - 21 Sep	Lufthansa
01 Sep - 08 Sep	Lufthansa
09 Sep - 11 Oct	Air Dolomiti
23 Sep - 14 Oct	Lufthansa
17 Sep - 09 Oct	Air Dolomiti
27 Sep - 11 Oct	Lufthansa
23 Sep - 03 Oct	SWISS
27 Sep - 10 Oct	Lufthansa
21 Sep - 05 Oct	Virgin Atlantic
12 Sep - 03 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 488€

Return flights