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

Return flights

03 Sep - 08 Sep	WestJet
03 Sep - 09 Sep	WestJet
29 Sep - 09 Oct	WestJet
01 Sep - 15 Oct	WestJet
14 Sep - 24 Sep	Air Transat
07 Sep - 18 Sep	WestJet
23 Sep - 27 Sep	WestJet
04 Sep - 18 Sep	WestJet
07 Sep - 13 Sep	Air Transat
24 Sep - 02 Oct	Air Transat
11 Sep - 18 Sep	WestJet
10 Sep - 20 Sep	Air Transat
04 Sep - 13 Sep	Air Transat
08 Sep - 03 Oct	Air Transat
26 Sep - 02 Oct	Air Transat
23 Sep - 15 Oct	WestJet
04 Sep - 02 Oct	WestJet

Also check the deals for one-way flights from Toronto to London 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 Toronto to London in September from 514€

Return flights