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

Return flights

19 Sep - 29 Sep	Malaysia Airlines
07 Sep - 19 Sep	AirAsia
17 Sep - 19 Sep	AirAsia
07 Sep - 18 Sep	AirAsia
21 Sep - 08 Oct	AirAsia
10 Sep - 24 Sep	Air India
17 Sep - 18 Sep	AirAsia
11 Sep - 14 Sep	Air India
22 Sep - 28 Sep	Air India
04 Sep - 08 Sep	Air India
26 Sep - 29 Sep	Air India
21 Sep - 05 Oct	AirAsia
21 Sep - 07 Oct	AirAsia
17 Sep - 05 Oct	AirAsia
17 Sep - 07 Oct	AirAsia
26 Sep - 06 Oct	Air India
21 Sep - 01 Oct	AirAsia
21 Sep - 06 Oct	AirAsia
17 Sep - 01 Oct	AirAsia
17 Sep - 06 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 256€

Return flights