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

Return flights

18 Sep - 20 Sep	Air India
20 Sep - 22 Sep	Air India
10 Sep - 14 Sep	AirAsia
07 Sep - 21 Sep	AirAsia
12 Sep - 21 Sep	Air India
19 Sep - 24 Sep	Air India
20 Sep - 23 Sep	Air India
20 Sep - 24 Sep	Air India
20 Sep - 28 Sep	Air India
19 Sep - 22 Sep	Air India
27 Sep - 26 Oct	Air India
29 Sep - 06 Oct	Air India
28 Sep - 07 Oct	AirAsia
28 Sep - 06 Oct	AirAsia
16 Sep - 06 Oct	AirAsia
28 Sep - 08 Oct	AirAsia
28 Sep - 11 Oct	AirAsia
28 Sep - 01 Oct	AirAsia
16 Sep - 01 Oct	AirAsia
28 Sep - 15 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 214€

Return flights