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	Korean Air
17 Sep - 30 Sep	Korean Air
24 Sep - 05 Oct	Korean Air
11 Sep - 17 Sep	Korean Air
16 Sep - 23 Sep	Korean Air
09 Sep - 16 Sep	Korean Air
10 Sep - 24 Sep	Korean Air
17 Sep - 25 Sep	Korean Air
16 Sep - 25 Sep	Korean Air
15 Sep - 23 Sep	Korean Air
15 Sep - 18 Sep	Korean Air
21 Sep - 06 Oct	Korean Air
24 Sep - 01 Oct	Korean Air
30 Sep - 31 Oct	Korean Air
16 Sep - 15 Oct	Air India
29 Sep - 04 Oct	Korean Air
16 Sep - 14 Oct	Air India
06 Sep - 02 Oct	Delta
29 Sep - 05 Oct	Air India
27 Sep - 06 Oct	Korean Air

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 623€

Return flights