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

Return flights

07 Aug - 14 Aug	IndiGo
08 Aug - 15 Aug	IndiGo
11 Aug - 18 Aug	Air India
13 Aug - 20 Aug	Air India
10 Aug - 17 Aug	Air India
20 Aug - 28 Aug	Air India
03 Aug - 14 Aug	Air India
10 Aug - 20 Aug	Air India
11 Aug - 21 Aug	Air India
13 Aug - 18 Aug	Air India
31 Aug - 04 Sep	Air India
31 Aug - 04 Sep	IndiGo	direct
30 Aug - 07 Sep	IndiGo
21 Aug - 04 Sep	AirAsia
15 Aug - 04 Sep	AirAsia
18 Aug - 04 Sep	AirAsia
21 Aug - 10 Sep	AirAsia
21 Aug - 07 Sep	AirAsia
18 Aug - 07 Sep	AirAsia
30 Aug - 07 Sep	Singapore Airlines	direct

Also check the deals for one-way flights from Kolkata to Singapore in August.

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 August from 184€

Return flights