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

Return flights

22 Sep - 01 Oct	Ryanair
07 Sep - 19 Oct	Ryanair
23 Sep - 29 Sep	Ryanair
16 Sep - 22 Sep	Ryanair
09 Sep - 15 Sep	Ryanair
18 Sep - 22 Sep	Ryanair
09 Sep - 30 Sep	Ryanair
11 Sep - 15 Sep	Ryanair
09 Sep - 15 Oct	Ryanair
16 Sep - 14 Oct	Ryanair
16 Sep - 30 Sep	Ryanair
09 Sep - 01 Oct	Ryanair
07 Sep - 02 Oct	Ryanair
09 Sep - 06 Oct	Ryanair
09 Sep - 07 Oct	Ryanair
17 Sep - 29 Sep	Ryanair
25 Sep - 28 Sep	Ryanair
10 Sep - 28 Sep	Ryanair
24 Sep - 06 Oct	Ryanair
24 Sep - 08 Oct	Ryanair

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 366€

Return flights