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

Return flights

05 May - 12 May	Air Transat
04 May - 15 May	TAP
11 May - 18 May	TAP
04 May - 11 May	TAP
12 May - 19 May	Air Transat
13 May - 20 May	TAP
06 May - 13 May	TAP
24 May - 14 Jun	TAP
27 May - 03 Jun	TAP
08 May - 30 May	FrenchBee
13 May - 06 Jun	TAP
01 May - 08 May	Air Transat
15 May - 06 Jun	TAP
24 May - 31 May	TAP
25 May - 20 Jun	TAP
20 May - 06 Jun	TAP
27 May - 12 Jun	TAP
25 May - 01 Jun	TAP
16 May - 06 Jun	Air Transat
26 May - 02 Jun	Air Transat

Also check the deals for one-way flights from Montreal 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 Montreal to London in May from $571

Return flights