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

Return flights

06 May - 13 May	Lufthansa
07 May - 16 May	Lufthansa
06 May - 16 May	Lufthansa
13 May - 18 May	Lufthansa
13 May - 20 May	Lufthansa
06 May - 20 May	Lufthansa
11 May - 21 May	Icelandair
07 May - 17 May	Icelandair
11 May - 17 May	Icelandair
07 May - 21 May	Icelandair
14 May - 09 Jun	British Airways
12 May - 05 Jun	British Airways
14 May - 10 Jun	British Airways
08 May - 03 Jun	Air Canada
08 May - 03 Jun	Air Canada	direct
15 May - 02 Jun	British Airways
13 May - 16 Jun	British Airways
28 May - 07 Jun	Lufthansa
28 May - 06 Jun	Lufthansa
28 May - 04 Jun	Lufthansa

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 354€

Return flights