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

Return flights

13 May - 27 May	Air Canada
11 May - 20 May	Air Canada
01 May - 20 May	Air Canada
01 May - 12 May	Air Canada
08 May - 13 May	Air Canada
06 May - 28 May	Air Canada
05 May - 28 May	Air Canada
13 May - 20 May	Air Canada
10 May - 20 May	Air Canada
24 May - 31 May	Air Canada
30 May - 07 Jun	Air Canada
21 May - 07 Jun	Porter Airlines (Canada) Ltd
31 May - 07 Jun	Porter Airlines (Canada) Ltd
07 May - 01 Jun	Porter Airlines (Canada) Ltd
08 May - 06 Jun	Porter Airlines (Canada) Ltd

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

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 May from $730

Return flights