Cheapest return flights from Montreal to London in September from $463

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

Return flights

18 Sep - 30 Sep Air Transat direct
14 Sep - 22 Sep Air Transat direct
15 Sep - 22 Sep Air Transat direct
15 Sep - 30 Sep Air Transat direct
21 Sep - 30 Sep Air Transat direct
06 Sep - 14 Sep Air Transat direct
07 Sep - 22 Sep Air Transat direct
13 Sep - 22 Sep Air Transat direct
10 Sep - 22 Sep Air Transat direct
14 Sep - 23 Sep Air Transat direct
24 Sep - 05 Oct Air Transat direct
29 Sep - 10 Oct Air Transat direct
27 Sep - 05 Oct Air Transat direct
18 Sep - 07 Oct Air Transat direct
20 Sep - 08 Oct Air Transat
19 Sep - 03 Oct Air Transat
22 Sep - 01 Oct Air Transat
22 Sep - 13 Oct Air Transat
16 Sep - 05 Oct Air Transat
23 Sep - 07 Oct Air Transat

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

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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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