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

Return flights

07 Sep - 11 Sep	IndiGo	direct
06 Sep - 11 Sep	IndiGo	direct
03 Sep - 07 Sep	IndiGo	direct
03 Sep - 10 Sep	IndiGo	direct
17 Sep - 24 Sep	IndiGo	direct
05 Sep - 10 Sep	IndiGo	direct
08 Sep - 15 Sep	Air India
01 Sep - 05 Sep	IndiGo
15 Sep - 19 Sep	IndiGo
19 Sep - 30 Sep	Air India
18 Sep - 22 Oct	Air India
25 Sep - 04 Oct	Air India
25 Sep - 05 Oct	Air India
25 Sep - 02 Oct	Air India
24 Sep - 06 Oct	IndiGo
29 Sep - 05 Oct	Air India
25 Sep - 03 Oct	Air India
28 Sep - 04 Oct	IndiGo
26 Sep - 03 Oct	IndiGo
27 Sep - 07 Oct	IndiGo

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 202€

Return flights