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

Return flights

30 Sep - 06 Oct	AirAsia
04 Sep - 05 Sep	AirAsia
04 Sep - 22 Sep	AirAsia
19 Sep - 29 Sep	Thai AirAsia
03 Sep - 22 Sep	AirAsia
03 Sep - 05 Sep	AirAsia
09 Sep - 29 Sep	AirAsia
19 Sep - 06 Oct	Thai AirAsia
09 Sep - 22 Sep	AirAsia
04 Sep - 07 Sep	AirAsia
04 Sep - 06 Sep	AirAsia
19 Sep - 22 Sep	Thai AirAsia
30 Sep - 04 Oct	AirAsia
30 Sep - 14 Oct	AirAsia
19 Sep - 04 Oct	Thai AirAsia
30 Sep - 15 Oct	AirAsia
30 Sep - 11 Oct	AirAsia
30 Sep - 10 Oct	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 $373

Return flights