Cheapest return flights from Toronto to London in September from $439

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

Return flights

15 Sep - 22 Sep Porter Airlines (Canada) Ltd
29 Sep - 06 Oct WestJet
25 Sep - 29 Sep Porter Airlines (Canada) Ltd
03 Sep - 10 Sep Porter Airlines (Canada) Ltd
16 Sep - 22 Sep Porter Airlines (Canada) Ltd
08 Sep - 17 Sep Porter Airlines (Canada) Ltd
18 Sep - 22 Sep Porter Airlines (Canada) Ltd
02 Sep - 09 Sep Porter Airlines (Canada) Ltd
02 Sep - 16 Sep Porter Airlines (Canada) Ltd
01 Sep - 11 Sep Porter Airlines (Canada) Ltd
02 Sep - 10 Sep Porter Airlines (Canada) Ltd
26 Sep - 13 Oct WestJet
21 Sep - 11 Oct Air Transat
28 Sep - 07 Oct WestJet
26 Sep - 07 Oct WestJet
19 Sep - 21 Oct WestJet
10 Sep - 01 Oct WestJet
21 Sep - 05 Oct WestJet
23 Sep - 02 Oct Icelandair
12 Sep - 22 Oct WestJet

Also check the deals for one-way flights from Toronto to London in September.

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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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