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

Return flights

09 Sep - 10 Sep	Air India
13 Sep - 27 Sep	AirAsia
08 Sep - 10 Sep	Air India
15 Sep - 19 Sep	AirAsia
04 Sep - 17 Sep	AirAsia
08 Sep - 01 Oct	AirAsia
13 Sep - 01 Oct	AirAsia
04 Sep - 12 Sep	Air India
08 Sep - 17 Sep	Air India
03 Sep - 15 Sep	Air India
25 Sep - 30 Sep	Air India
04 Sep - 07 Sep	Air India
18 Sep - 06 Oct	AirAsia
12 Sep - 06 Oct	Air India
18 Sep - 08 Oct	AirAsia
10 Sep - 01 Oct	AirAsia
11 Sep - 01 Oct	AirAsia
18 Sep - 01 Oct	AirAsia
27 Sep - 06 Oct	AirAsia
27 Sep - 16 Oct	AirAsia

Also check the deals for one-way flights from Singapore 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 Singapore to Colombo in September from $268

Return flights