Cheapest return flights from Montreal to London in September from $549

Best time to book flights for Montreal (YUL) to London (LGW) flights at AirHint

AirHint found the following cheapest return flights from Montreal (YUL) to London (LGW) in September 2025 (see full year).

Return flights

07 Sep - 14 Sep Air Transat direct
13 Sep - 20 Sep Air Transat direct
19 Sep - 26 Sep Air Transat direct
04 Sep - 11 Sep Air Transat direct
12 Sep - 19 Sep Air Transat direct
18 Sep - 25 Sep Air Transat direct
25 Sep - 02 Oct Air Transat direct
22 Sep - 16 Oct Air Transat direct
08 Sep - 22 Sep Air Transat direct
19 Sep - 22 Sep Air Transat direct
06 Sep - 14 Sep Air Transat direct
12 Sep - 26 Sep Air Transat direct
27 Sep - 10 Oct Air Transat direct
19 Sep - 17 Oct Air Transat direct
27 Sep - 04 Oct Air Transat
29 Sep - 06 Oct Air Transat
24 Sep - 01 Oct Air Transat
26 Sep - 03 Oct Air Transat
23 Sep - 03 Oct Air Transat
17 Sep - 01 Oct Air Transat

Also check the deals for one-way flights from Montreal to London in September.

Skyscanner

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.

Book a cheap hotel in London

Cheap car rent in London