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

Return flights

27 Sep - 04 Oct	Ryanair
05 Sep - 29 Sep	Fly One
23 Sep - 14 Oct	Aer Lingus
01 Sep - 01 Oct	Fly One
08 Sep - 18 Sep	HiSky Europe
19 Sep - 29 Sep	Pegasus Airlines
20 Sep - 28 Sep	Pegasus Airlines
06 Sep - 23 Sep	Pegasus Airlines
05 Sep - 19 Sep	Fly One
05 Sep - 12 Sep	Fly One
14 Sep - 28 Sep	Pegasus Airlines
12 Sep - 19 Sep	Fly One
12 Sep - 26 Sep	Fly One
22 Sep - 04 Oct	Aer Lingus

Also check the deals for one-way flights from Dublin 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 Dublin to Colombo in September from $638

Return flights