Cheapest return flights from Montreal to London in September from 421€

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

Return flights

08 Sep - 15 Sep Porter Airlines (Canada) Ltd
19 Sep - 22 Sep Air Transat
28 Sep - 05 Oct Air Transat
10 Sep - 01 Oct Porter Airlines (Canada) Ltd
17 Sep - 24 Sep Porter Airlines (Canada) Ltd
22 Sep - 26 Sep Air Transat
03 Sep - 17 Sep Porter Airlines (Canada) Ltd
08 Sep - 13 Sep Air Transat direct
17 Sep - 23 Sep Air Transat direct
22 Sep - 26 Sep Air Transat direct
21 Sep - 25 Sep Air Transat direct
08 Sep - 22 Sep Air Transat direct
20 Sep - 05 Oct Air Transat direct
29 Sep - 05 Oct Air Transat direct
18 Sep - 05 Oct Air Transat direct
19 Sep - 05 Oct Air Transat
24 Sep - 01 Oct Air Transat
30 Sep - 07 Oct Air Transat
27 Sep - 03 Oct Air Transat
15 Sep - 08 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.

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