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

Return flights

26 May - 09 Jun	TAP
25 May - 06 Jun	Air Transat
25 May - 08 Jun	Air Transat
20 May - 03 Jun	Air Transat
07 May - 14 May	WestJet
26 May - 10 Jun	TAP
16 May - 06 Jun	Air Transat
28 May - 13 Jun	Air Transat
17 May - 27 May	Air Transat
09 May - 17 May	Air Transat
01 May - 10 May	Aer Lingus
11 May - 24 May	Air Transat
01 May - 09 May	Air Transat
22 May - 09 Jun	Air Transat
22 May - 02 Jun	Aer Lingus
13 May - 26 May	Air Transat
28 May - 09 Jun	WestJet
16 May - 24 May	WestJet
06 May - 30 May	Air Transat
03 May - 10 May	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 555€

Return flights