AirHint found the following cheapest one-way flights from Toronto (YYZ) to Colombo (CMB) in September 2025 (see full year).

One-Way flights

16 Sep	Air Transat
10 Sep	WestJet
18 Sep	Air Transat
15 Sep	Air Transat
03 Sep	Cathay Pacific
24 Sep	WestJet
01 Sep	Porter Airlines (Canada) Ltd
07 Sep	Cathay Pacific
06 Sep	Cathay Pacific
02 Sep	Flair Airlines

Also check the deals for return flights from Toronto 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 one-way flights from Toronto to Colombo in September from $424

One-Way flights