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
20 May - 27 May	TAP
27 May - 03 Jun	TAP
04 May - 11 May	TAP
03 May - 10 May	TAP
31 May - 07 Jun	TAP
04 May - 13 May	TAP
11 May - 18 May	TAP
18 May - 25 May	TAP
24 May - 31 May	TAP
03 May - 13 May	TAP
06 May - 13 May	TAP
25 May - 01 Jun	TAP
26 May - 02 Jun	Air Transat
30 May - 06 Jun	Air Transat
28 May - 04 Jun	Air Transat
29 May - 05 Jun	Air Transat
29 May - 05 Jun	Air Transat	direct
30 May - 06 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 573€

Return flights