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

Return flights

13 May - 20 May	TAP
06 May - 13 May	TAP
04 May - 20 May	TAP
21 May - 25 May	Air Transat
09 May - 20 May	Air Transat
24 May - 31 May	TAP
07 May - 16 May	Air Transat	direct
09 May - 23 May	Air Transat	direct
11 May - 18 May	TAP
04 May - 15 May	Air Transat
25 May - 25 Jun	TAP
23 May - 06 Jun	Air Transat	direct
22 May - 05 Jun	Air Transat	direct
19 May - 12 Jun	Air Transat	direct
25 May - 16 Jun	TAP
21 May - 04 Jun	Air Transat
20 May - 03 Jun	Air Transat
11 May - 01 Jun	Air Transat
29 May - 05 Jun	Air Transat	direct
31 May - 07 Jun	Air Transat	direct

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 437€

Return flights