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

Return flights

10 Sep - 17 Sep	Philippine Airlines
08 Sep - 15 Sep	Korean Air
03 Sep - 11 Sep	Delta
04 Sep - 11 Sep	Delta
03 Sep - 09 Sep	Delta
30 Sep - 07 Oct	Korean Air
11 Sep - 24 Sep	Korean Air
09 Sep - 16 Sep	Korean Air
16 Sep - 30 Sep	Etihad Airways
29 Sep - 06 Oct	Air India
24 Sep - 08 Oct	Etihad Airways
30 Sep - 08 Oct	Air India
15 Sep - 30 Sep	Air India
22 Sep - 05 Oct	Air India
05 Sep - 19 Sep	Delta
21 Sep - 09 Oct	IndiGo
01 Sep - 01 Oct	Air India
02 Sep - 02 Oct	IndiGo
25 Sep - 05 Oct	IndiGo
28 Sep - 26 Oct	Etihad Airways

Also check the deals for one-way flights from New York 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 New York to Singapore in September from 601€

Return flights