Cheapest return flights from Montreal to London in September from $574

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

26 Sep - 03 Oct Brussels Airlines
22 Sep - 29 Sep Air Transat
25 Sep - 02 Oct Brussels Airlines
08 Sep - 15 Sep Air Transat
24 Sep - 08 Oct British Airways direct
04 Sep - 11 Sep Air Transat
17 Sep - 08 Oct British Airways direct
06 Sep - 13 Sep Air Transat
01 Sep - 05 Sep Air Transat
20 Sep - 27 Sep Air Transat
29 Sep - 10 Oct British Airways direct
24 Sep - 01 Oct TAP
19 Sep - 10 Oct British Airways direct
17 Sep - 24 Sep FrenchBee
10 Sep - 17 Sep FrenchBee
24 Sep - 07 Oct TAP
17 Sep - 01 Oct Air Canada
27 Sep - 04 Oct Air Canada
12 Sep - 19 Sep FrenchBee
15 Sep - 22 Sep FrenchBee

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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