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

Return flights

30 Sep - 05 Oct	AirAsia
12 Sep - 19 Sep	Air India
19 Sep - 21 Sep	Air India
14 Sep - 16 Sep	Air India
24 Sep - 04 Oct	AirAsia
19 Sep - 22 Sep	Air India
20 Sep - 24 Sep	Air India
12 Sep - 14 Sep	Air India
26 Sep - 28 Sep	Air India
13 Sep - 27 Sep	Air India
10 Sep - 17 Sep	Air India
20 Sep - 30 Sep	Air India
15 Sep - 08 Oct	Air India
16 Sep - 01 Oct	AirAsia
15 Sep - 04 Oct	Air India
16 Sep - 03 Oct	AirAsia
16 Sep - 04 Oct	Air India
15 Sep - 01 Oct	AirAsia
29 Sep - 05 Oct	Air India
27 Sep - 05 Oct	Air India

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 $264

Return flights