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

Return flights

23 Sep - 30 Sep	Qatar Airways
30 Sep - 07 Oct	Qatar Airways
24 Sep - 02 Oct	Qatar Airways
24 Sep - 01 Oct	Qatar Airways
22 Sep - 29 Sep	Air Canada
25 Sep - 02 Oct	Japan Airlines
28 Sep - 05 Oct	FrenchBee
21 Sep - 30 Sep	Air Canada
20 Sep - 27 Sep	Cathay Pacific
29 Sep - 06 Oct	Porter Airlines (Canada) Ltd
21 Sep - 28 Sep	Porter Airlines (Canada) Ltd
27 Sep - 04 Oct	Porter Airlines (Canada) Ltd
19 Sep - 26 Sep	Korean Air

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

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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Cheapest return flights from Montreal to Kuala Lumpur in September from $1066

Return flights