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

Return flights

22 Sep - 07 Oct	Air India
11 Sep - 20 Sep	Air India
07 Sep - 22 Sep	Air India
23 Sep - 17 Oct	Air India
23 Sep - 03 Oct	Air India
23 Sep - 26 Oct	Air India
02 Sep - 05 Oct	Air India
10 Sep - 25 Sep	Air India
28 Sep - 24 Oct	Etihad Airways
01 Sep - 10 Sep	Air India
26 Sep - 03 Oct	Air India
12 Sep - 16 Oct	Air India
26 Sep - 04 Oct	Etihad Airways
20 Sep - 27 Sep	Air India

Also check the deals for one-way flights from New York to Kolkata 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 New York to Kolkata in September from $575

Return flights