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

Return flights

08 May - 16 May	SWISS
01 May - 06 May	Icelandair
13 May - 21 May	Icelandair
02 May - 10 May	Icelandair
01 May - 04 May	Icelandair
14 May - 18 May	Icelandair
09 May - 17 May	Icelandair
14 May - 17 May	Icelandair
02 May - 09 May	Icelandair
10 May - 13 May	Lufthansa
12 May - 04 Jun	Air Canada
05 May - 05 Jun	British Airways
15 May - 02 Jun	SWISS
03 May - 06 Jun	SWISS
02 May - 14 Jun	SWISS
03 May - 27 Jun	Lufthansa
27 May - 02 Jun	SWISS
27 May - 01 Jun	SWISS
28 May - 06 Jun	SWISS
26 May - 24 Jun	SWISS

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 348€

Return flights