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

Return flights

28 May - 08 Jun	SWISS
02 May - 10 May	SWISS
01 May - 15 May	SWISS
05 May - 12 May	Aer Lingus
01 May - 09 May	SWISS
03 May - 10 May	Aer Lingus
19 May - 01 Jun	Aer Lingus
06 May - 11 May	SWISS
01 May - 05 May	Aer Lingus
26 May - 09 Jun	Aer Lingus
04 May - 15 May	Aer Lingus
09 May - 17 May	SWISS
13 May - 20 May	Aer Lingus
26 May - 02 Jun	SWISS
21 May - 02 Jun	Aer Lingus
27 May - 07 Jun	Aer Lingus
27 May - 10 Jun	Aer Lingus
28 May - 10 Jun	Aer Lingus

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 $1008

Return flights