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

Return flights

11 Dec - 29 Dec	IndiGo	direct
11 Dec - 09 Jan	IndiGo	direct
03 Dec - 06 Jan	IndiGo
02 Dec - 30 Jan	Air India Express
14 Dec - 20 Jan	AirAsia
18 Dec - 31 Dec	IndiGo
25 Dec - 31 Dec	IndiGo
31 Dec - 16 Jan	IndiGo
23 Dec - 31 Dec	IndiGo
03 Dec - 06 Jan	Singapore Airlines	direct
30 Dec - 16 Jan	IndiGo
24 Dec - 31 Dec	IndiGo
23 Dec - 28 Dec	IndiGo
03 Dec - 10 Dec	Singapore Airlines	direct
18 Dec - 25 Dec	IndiGo	direct
09 Dec - 16 Dec	IndiGo	direct
03 Dec - 09 Dec	AirAsia
31 Dec - 16 Jan	Singapore Airlines	direct
30 Dec - 26 Jan	IndiGo
26 Dec - 03 Jan	IndiGo

Also check the deals for one-way flights from Kolkata 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 Kolkata to Singapore in December from $234

Return flights