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

Return flights

02 Dec - 09 Dec	IndiGo
17 Dec - 04 Jan	FitsAir
05 Dec - 09 Dec	AirAsia
06 Dec - 11 Dec	AirAsia
15 Dec - 29 Dec	IndiGo
02 Dec - 11 Dec	AirAsia
02 Dec - 10 Dec	AirAsia
17 Dec - 04 Jan	Singapore Airlines	direct
04 Dec - 09 Dec	AirAsia
17 Dec - 15 Jan	AirAsia
02 Dec - 29 Dec	IndiGo
01 Dec - 30 Dec	IndiGo
04 Dec - 08 Dec	AirAsia
22 Dec - 04 Jan	AirAsia
21 Dec - 04 Jan	AirAsia
22 Dec - 02 Jan	IndiGo
25 Dec - 01 Jan	Singapore Airlines	direct
24 Dec - 04 Jan	AirAsia
22 Dec - 04 Jan	Singapore Airlines	direct
23 Dec - 04 Jan	Singapore Airlines	direct

Also check the deals for one-way flights from Colombo to Singapore in December.

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 Colombo to Singapore in December from $268

Return flights