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

Return flights

30 Sep - 07 Oct	VietJet Air
29 Sep - 14 Oct	VietJet Air
19 Sep - 26 Sep	Thai AirAsia
18 Sep - 25 Sep	Thai AirAsia
18 Sep - 30 Sep	Thai AirAsia
28 Sep - 14 Oct	VietJet Air
20 Sep - 27 Sep	Thai AirAsia
21 Sep - 28 Sep	VietJet Air
25 Sep - 03 Oct	Thai AirAsia
25 Sep - 12 Oct	Thai AirAsia
25 Sep - 01 Oct	Thai AirAsia
25 Sep - 11 Oct	Thai AirAsia
25 Sep - 30 Sep	Thai AirAsia
25 Sep - 06 Oct	Thai AirAsia
29 Sep - 03 Oct	Thai AirAsia
25 Sep - 13 Oct	Thai AirAsia
25 Sep - 27 Sep	Thai AirAsia
25 Sep - 28 Sep	Thai AirAsia
29 Sep - 30 Sep	Thai AirAsia
25 Sep - 29 Sep	Thai AirAsia

Also check the deals for one-way flights from Hanoi 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 Hanoi to Colombo in September from $358

Return flights