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

Return flights

30 Sep - 07 Oct	Air Transat
28 Sep - 05 Oct	FrenchBee
21 Sep - 06 Oct	FrenchBee
29 Sep - 11 Oct	FrenchBee
19 Sep - 30 Sep	Qatar Airways
18 Sep - 30 Sep	Porter Airlines (Canada) Ltd
29 Sep - 06 Oct	FrenchBee
23 Sep - 29 Sep	Air Transat
23 Sep - 30 Sep	Air Transat
24 Sep - 29 Sep	FrenchBee
19 Sep - 02 Oct	FrenchBee
24 Sep - 01 Oct	FrenchBee
26 Sep - 03 Oct	FrenchBee
22 Sep - 29 Sep	FrenchBee
29 Sep - 29 Oct	FrenchBee
25 Sep - 02 Oct	Air Transat
26 Sep - 29 Sep	FrenchBee
19 Sep - 26 Sep	Qatar Airways
25 Sep - 29 Sep	Air Transat
21 Sep - 28 Sep	FrenchBee

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 945€

Return flights