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

Return flights

28 Sep - 05 Oct	FrenchBee
17 Sep - 24 Sep	FrenchBee
16 Sep - 23 Sep	Air Transat
24 Sep - 01 Oct	FrenchBee
14 Sep - 21 Sep	FrenchBee
21 Sep - 28 Sep	FrenchBee
08 Sep - 06 Oct	FrenchBee
22 Sep - 29 Sep	Porter Airlines (Canada) Ltd
13 Sep - 20 Sep	Air Transat
29 Sep - 06 Oct	Porter Airlines (Canada) Ltd
25 Sep - 02 Oct	Air Transat
20 Sep - 27 Sep	Porter Airlines (Canada) Ltd
30 Sep - 07 Oct	British Airways
12 Sep - 19 Sep	FrenchBee
26 Sep - 03 Oct	WestJet
23 Sep - 30 Sep	Air Transat
09 Sep - 16 Sep	Air Transat
27 Sep - 04 Oct	Porter Airlines (Canada) Ltd

Also check the deals for one-way flights from Montreal to Colombo 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 Colombo in September from $1064

Return flights