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

Return flights

14 Sep - 21 Sep	China Eastern
13 Sep - 20 Sep	China Eastern
12 Sep - 14 Sep	China Eastern
10 Sep - 16 Sep	China Eastern
13 Sep - 18 Sep	China Eastern
09 Sep - 16 Sep	China Eastern
10 Sep - 17 Sep	HK Express
17 Sep - 24 Sep	China Eastern
25 Sep - 28 Sep	HK Express
25 Sep - 29 Sep	HK Express
22 Sep - 11 Oct	AirAsia
22 Sep - 12 Oct	AirAsia
27 Sep - 04 Oct	AirAsia
22 Sep - 13 Oct	AirAsia
25 Sep - 13 Oct	AirAsia
27 Sep - 13 Oct	AirAsia
30 Sep - 06 Oct	Cathay Pacific
27 Sep - 06 Oct	Cathay Pacific
25 Sep - 11 Oct	AirAsia
25 Sep - 12 Oct	AirAsia

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 $310

Return flights