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

Return flights

12 May - 23 May	Air Canada
09 May - 23 May	Air Canada
19 May - 02 Jun	Air Canada
08 May - 22 May	Air Canada
29 May - 02 Jun	Air Canada
04 May - 21 May	Air Canada
15 May - 30 May	Air Canada
15 May - 06 Jun	Air Canada
14 May - 28 May	Air Canada
25 May - 24 Jun	Air Canada
01 May - 22 May	Air Canada
16 May - 30 May	Air Canada
16 May - 31 May	Air Canada
21 May - 30 May	Air Canada
28 May - 11 Jun	Air Canada
21 May - 01 Jun	Air Canada
18 May - 01 Jun	Air Canada
25 May - 04 Jun	Air Canada
29 May - 01 Jun	Air Canada
12 May - 02 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 $455

Return flights