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

Return flights

17 Sep - 24 Sep	IndiGo
05 Sep - 09 Sep	IndiGo	direct
24 Sep - 26 Sep	AirAsia
20 Sep - 23 Sep	IndiGo	direct
05 Sep - 07 Sep	IndiGo	direct
17 Sep - 21 Sep	IndiGo	direct
23 Sep - 30 Sep	IndiGo	direct
22 Sep - 26 Sep	AirAsia
19 Sep - 22 Sep	IndiGo	direct
16 Sep - 22 Sep	IndiGo	direct
24 Sep - 01 Oct	AirAsia
24 Sep - 14 Oct	AirAsia
29 Sep - 19 Oct	AirAsia
22 Sep - 01 Oct	AirAsia
24 Sep - 01 Oct	IndiGo	direct
24 Sep - 08 Oct	AirAsia
24 Sep - 09 Oct	AirAsia
24 Sep - 12 Oct	AirAsia
30 Sep - 07 Oct	Air India
22 Sep - 08 Oct	AirAsia

Also check the deals for one-way flights from Kolkata to Singapore 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 Kolkata to Singapore in September from $240

Return flights