Cheapest return flights from Toronto to London in September from $638

Best time to book flights for Toronto (YYZ) to London (LHR) flights at AirHint

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

Return flights

21 Sep - 11 Oct Icelandair
25 Sep - 10 Oct Icelandair
25 Sep - 30 Sep Icelandair
24 Sep - 07 Oct Icelandair
19 Sep - 04 Oct Icelandair
28 Sep - 05 Oct Icelandair
20 Sep - 04 Oct Icelandair
21 Sep - 30 Sep Icelandair
23 Sep - 08 Oct Icelandair
26 Sep - 22 Oct Icelandair
22 Sep - 14 Oct Icelandair
26 Sep - 04 Oct Icelandair
02 Sep - 09 Sep Air Transat
18 Sep - 29 Sep Aer Lingus
03 Sep - 18 Sep Aer Lingus
04 Sep - 24 Sep Aer Lingus
15 Sep - 30 Sep Aer Lingus
02 Sep - 17 Sep Aer Lingus
10 Sep - 30 Sep Aer Lingus
24 Sep - 30 Sep Aer Lingus

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

Skyscanner

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.

Book a cheap hotel in London

Cheap car rent in London