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

Return flights

18 Sep - 27 Sep	TAP
17 Sep - 24 Sep	TAP
17 Sep - 09 Oct	Finnair	direct
18 Sep - 27 Sep	Finnair	direct
11 Sep - 21 Sep	British Airways	direct
12 Sep - 21 Sep	British Airways	direct
17 Sep - 24 Sep	British Airways	direct
04 Sep - 13 Sep	TAP
10 Sep - 22 Sep	TAP
12 Sep - 27 Sep	British Airways	direct
05 Sep - 18 Sep	British Airways	direct
26 Sep - 31 Oct	Lufthansa

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 515€

Return flights