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

Return flights

31 Aug - 16 Sep	WestJet
27 Aug - 09 Sep	WestJet
26 Aug - 09 Sep	WestJet
25 Aug - 30 Aug	WestJet
28 Aug - 09 Sep	WestJet
19 Aug - 30 Aug	Azores Airlines
23 Aug - 14 Sep	TAP
24 Aug - 30 Aug	WestJet
25 Aug - 03 Sep	WestJet
25 Aug - 30 Sep	WestJet
20 Aug - 16 Sep	WestJet
31 Aug - 13 Sep	WestJet
28 Aug - 14 Sep	WestJet
28 Aug - 30 Aug	WestJet
22 Aug - 30 Aug	WestJet
19 Aug - 23 Aug	Air Transat
25 Aug - 28 Aug	WestJet
26 Aug - 28 Aug	WestJet
25 Aug - 29 Aug	WestJet
25 Aug - 27 Aug	WestJet

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

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 August from 646€

Return flights