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

Return flights

12 Sep - 26 Sep	AirAsia
03 Sep - 14 Sep	AirAsia
04 Sep - 06 Sep	AirAsia
04 Sep - 19 Sep	AirAsia
04 Sep - 23 Sep	AirAsia
04 Sep - 07 Sep	AirAsia
01 Sep - 06 Sep	AirAsia
01 Sep - 19 Sep	AirAsia
01 Sep - 05 Sep	AirAsia
01 Sep - 03 Sep	AirAsia
23 Sep - 14 Oct	AirAsia
24 Sep - 15 Oct	Batik Air Malaysia
30 Sep - 20 Oct	AirAsia
12 Sep - 01 Oct	AirAsia
30 Sep - 19 Oct	AirAsia
30 Sep - 13 Oct	AirAsia
30 Sep - 01 Oct	AirAsia
30 Sep - 12 Oct	AirAsia
29 Sep - 06 Oct	AirAsia
26 Sep - 18 Oct	AirAsia

Also check the deals for one-way flights from Perth 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 Perth to Colombo in September from 356€

Return flights