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

Return flights

18 May - 27 May	TAP
20 May - 27 May	TAP
13 May - 27 May	TAP
06 May - 13 May	Icelandair
02 May - 10 May	Icelandair
07 May - 14 May	Icelandair
01 May - 11 May	Icelandair
05 May - 10 May	Icelandair
07 May - 12 May	Icelandair
02 May - 13 May	Icelandair
26 May - 16 Jun	ITA Airways
26 May - 02 Jun	ITA Airways
26 May - 03 Jun	ITA Airways
27 May - 03 Jun	ITA Airways
25 May - 04 Jun	ITA Airways
28 May - 02 Jun	ITA Airways
15 May - 02 Jun	ITA Airways
10 May - 17 Jun	Icelandair
28 May - 07 Jun	ITA Airways
28 May - 06 Jun	ITA Airways

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 382€

Return flights