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

Return flights

08 Sep - 22 Sep	Singapore Airlines
03 Sep - 18 Sep	Singapore Airlines
04 Sep - 18 Sep	Singapore Airlines
29 Sep - 29 Oct	Qantas
13 Sep - 27 Sep	Qantas
13 Sep - 28 Sep	Qantas
29 Sep - 17 Oct	Singapore Airlines
18 Sep - 06 Oct	Malaysia Airlines
26 Sep - 10 Oct	Malaysia Airlines
18 Sep - 05 Oct	Singapore Airlines
27 Sep - 11 Oct	Malaysia Airlines
06 Sep - 20 Sep	Emirates
03 Sep - 12 Sep	Jetstar

Also check the deals for one-way flights from Adelaide 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 Adelaide to Colombo in September from $760

Return flights