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

Return flights

10 Sep - 20 Sep	China Airlines
24 Sep - 03 Oct	China Airlines
14 Sep - 24 Sep	China Airlines
15 Sep - 25 Sep	China Airlines
09 Sep - 16 Sep	China Airlines
02 Sep - 16 Sep	China Airlines
13 Sep - 20 Sep	China Airlines
29 Sep - 08 Oct	China Airlines
25 Sep - 02 Oct	China Airlines
01 Sep - 10 Sep	China Airlines
10 Sep - 26 Sep	China Airlines
01 Sep - 16 Sep	China Airlines
16 Sep - 03 Oct	China Airlines
24 Sep - 01 Oct	China Airlines
16 Sep - 14 Oct	China Airlines
24 Sep - 08 Oct	China Airlines
06 Sep - 13 Sep	China Airlines

Also check the deals for one-way flights from Ontario 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 Ontario to Kuala Lumpur in September from $884

Return flights