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

Return flights

18 Sep - 28 Sep	Korean Air
03 Sep - 25 Sep	Delta
09 Sep - 16 Sep	Delta
16 Sep - 25 Sep	Delta
17 Sep - 24 Sep	Delta
16 Sep - 24 Sep	Delta
24 Sep - 29 Oct	Delta
10 Sep - 19 Sep	Delta
01 Sep - 28 Sep	Korean Air
19 Sep - 28 Sep	IndiGo
12 Sep - 24 Sep	Delta
24 Sep - 05 Oct	Philippine Airlines
28 Sep - 02 Oct	Philippine Airlines
24 Sep - 22 Oct	Ethiopian Airlines
23 Sep - 02 Oct	ANA
30 Sep - 05 Oct	United
30 Sep - 07 Oct	Delta

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 638€

Return flights