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

Return flights

05 May - 15 May	Air Canada
08 May - 16 May	Air Canada
07 May - 23 May	Air Canada
21 May - 27 May	Air Canada
05 May - 13 May	Air Canada
06 May - 17 May	Air Canada
08 May - 21 May	Air Canada
05 May - 16 May	Air Canada
08 May - 05 Jun	Air Canada
15 May - 29 May	Air Canada
06 May - 16 May	Air Canada
21 May - 06 Jun	Air Canada
20 May - 02 Jun	Icelandair
11 May - 11 Jun	Air Canada
19 May - 02 Jun	Icelandair
30 May - 05 Jun	Icelandair
20 May - 04 Jun	Icelandair
20 May - 03 Jun	Icelandair
25 May - 04 Jun	Air Canada
18 May - 01 Jun	Air Canada

Also check the deals for one-way flights from London to Toronto 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 London to Toronto in May from 377€

Return flights