AirHint found the following cheapest return flights from London (LGW) to Montreal (YUL) in May 2026 (see full year).

Return flights

08 May - 22 May	Air Transat
06 May - 10 May	Air Transat
09 May - 16 May	Air Transat
15 May - 22 May	Air Transat
07 May - 21 May	Air Transat
15 May - 20 May	Air Transat
01 May - 15 May	Air Transat
07 May - 26 May	Air Transat
14 May - 17 May	SWISS
04 May - 12 May	easyJet
27 May - 01 Jun	SWISS
20 May - 04 Jun	SWISS
23 May - 11 Jun	Air Transat	direct
30 May - 13 Jun	Air Transat
25 May - 05 Jun	Air Transat
29 May - 03 Jun	Air Transat
29 May - 01 Jun	Air Transat
25 May - 04 Jun	Air France
25 May - 03 Jun	Air Transat
19 May - 23 Jun	Air Transat

Also check the deals for one-way flights from London to Montreal 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 Montreal in May from 400€

Return flights