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

Return flights

06 May - 13 May	TAP
04 May - 13 May	TAP
04 May - 12 May	TAP
01 May - 11 May	Icelandair
01 May - 09 May	Icelandair
01 May - 05 May	Icelandair
06 May - 17 May	Icelandair
12 May - 26 May	Aer Lingus
13 May - 20 May	Aer Lingus
13 May - 21 May	Aer Lingus
21 May - 09 Jun	Aer Lingus
27 May - 20 Jun	Aer Lingus
27 May - 12 Jun	TAP
22 May - 01 Jun	Air Canada
16 May - 06 Jun	Icelandair
31 May - 07 Jun	Air Canada
23 May - 14 Jun	Aer Lingus
21 May - 07 Jun	Aer Lingus
29 May - 04 Jun	Aer Lingus
13 May - 08 Jun	Aer Lingus

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 429€

Return flights