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

Return flights

17 Sep - 30 Sep	HK Express
03 Sep - 09 Sep	AirAsia
03 Sep - 13 Sep	AirAsia
06 Sep - 13 Sep	HK Express
06 Sep - 17 Sep	AirAsia
06 Sep - 12 Sep	AirAsia
06 Sep - 09 Sep	AirAsia
28 Sep - 09 Oct	AirAsia
28 Sep - 11 Oct	AirAsia
26 Sep - 09 Oct	AirAsia
26 Sep - 11 Oct	AirAsia
28 Sep - 30 Sep	AirAsia
26 Sep - 30 Sep	AirAsia
28 Sep - 08 Oct	AirAsia
17 Sep - 17 Sep	AirAsia
26 Sep - 08 Oct	AirAsia
30 Sep - 06 Oct	Batik Air Malaysia
28 Sep - 12 Oct	AirAsia
26 Sep - 12 Oct	AirAsia
26 Sep - 05 Oct	Thai Lion Air

Also check the deals for one-way flights from Hong Kong 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 Hong Kong to Colombo in September from $413

Return flights