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

Return flights

06 Sep - 12 Sep	Ryanair
26 Sep - 06 Oct	Ryanair
23 Sep - 01 Oct	Ryanair
26 Sep - 10 Oct	Ryanair
04 Sep - 18 Sep	easyJet
30 Sep - 06 Oct	Ryanair
03 Sep - 16 Sep	Ryanair
23 Sep - 30 Sep	easyJet
17 Sep - 29 Sep	easyJet
17 Sep - 30 Sep	easyJet
17 Sep - 24 Sep	easyJet
04 Sep - 09 Sep	Ryanair
05 Sep - 12 Sep	Ryanair
04 Sep - 11 Sep	Ryanair
25 Sep - 04 Oct	Ryanair
18 Sep - 02 Oct	Ryanair
27 Sep - 11 Oct	Ryanair
24 Sep - 10 Oct	Ryanair
15 Sep - 06 Oct	Ryanair
10 Sep - 21 Oct	easyJet

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 406€

Return flights