Cheapest return flights from Montreal to London in September from $682

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

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

Return flights

24 Sep - 01 Oct TAP
25 Sep - 02 Oct TAP
26 Sep - 03 Oct TAP
29 Sep - 06 Oct TAP
28 Sep - 05 Oct TAP
24 Sep - 01 Oct Air Canada direct
29 Sep - 06 Oct Air Canada direct
30 Sep - 07 Oct Air Canada direct
17 Sep - 08 Oct Air Canada
26 Sep - 10 Oct Air Canada direct
18 Sep - 25 Sep TAP
21 Sep - 28 Sep TAP
22 Sep - 29 Sep TAP
04 Sep - 11 Sep Air Transat
09 Sep - 16 Sep Air Transat
10 Sep - 17 Sep Air Transat
23 Sep - 30 Sep Air Transat
22 Sep - 29 Sep Air Canada direct
23 Sep - 30 Sep Air Canada direct
11 Sep - 18 Sep 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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