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

Return flights

02 Sep - 06 Sep	Air India
20 Sep - 27 Sep	Air India
01 Sep - 18 Sep	Air India
04 Sep - 08 Sep	Air India
15 Sep - 20 Sep	Air India
16 Sep - 24 Sep	Air India
07 Sep - 16 Sep	Air India
12 Sep - 18 Sep	Air India
10 Sep - 19 Sep	Air India
04 Sep - 09 Sep	Air India
26 Sep - 04 Oct	Air India
16 Sep - 20 Oct	Air India
26 Sep - 02 Oct	Air India
09 Sep - 20 Oct	Air India
23 Sep - 20 Oct	Air India
30 Sep - 07 Oct	Air India
30 Sep - 04 Oct	Air India
26 Sep - 04 Oct	FitsAir	direct
26 Sep - 02 Oct	FitsAir	direct
09 Sep - 20 Oct	SriLankan Airlines	direct

Also check the deals for one-way flights from Dhaka 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 Dhaka to Colombo in September from $297

Return flights