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

Return flights

11 Dec - 09 Jan	IndiGo	direct
15 Dec - 22 Jan	IndiGo	direct
10 Dec - 14 Jan	IndiGo	direct
07 Dec - 17 Jan	IndiGo
05 Dec - 14 Jan	IndiGo
03 Dec - 06 Jan	IndiGo
02 Dec - 30 Jan	Air India Express
14 Dec - 20 Jan	AirAsia
24 Dec - 07 Jan	IndiGo	direct
04 Dec - 10 Dec	Air India
04 Dec - 11 Dec	Air India
06 Dec - 13 Dec	Air India
03 Dec - 06 Jan	Singapore Airlines	direct
23 Dec - 27 Dec	IndiGo	direct
24 Dec - 31 Dec	IndiGo
10 Dec - 16 Dec	IndiGo	direct
03 Dec - 10 Dec	Singapore Airlines	direct
09 Dec - 16 Dec	IndiGo	direct
15 Dec - 22 Dec	Singapore Airlines	direct
03 Dec - 09 Dec	AirAsia

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 208€

Return flights