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

Return flights

10 Sep - 22 Sep	Delta
15 Sep - 23 Sep	Delta
17 Sep - 25 Sep	Delta
29 Sep - 06 Oct	Korean Air
24 Sep - 28 Sep	Korean Air
09 Sep - 16 Sep	Delta
15 Sep - 30 Sep	Korean Air
10 Sep - 14 Sep	Air India
22 Sep - 29 Sep	Korean Air
23 Sep - 27 Sep	Korean Air
15 Sep - 29 Sep	Spirit Airlines
24 Sep - 05 Oct	Delta
30 Sep - 07 Oct	Air India
20 Sep - 08 Oct	Spirit Airlines
25 Sep - 19 Oct	Delta
25 Sep - 09 Oct	jetBlue
29 Sep - 08 Oct	Air India
26 Sep - 05 Oct	Ethiopian Airlines
25 Sep - 05 Oct	Ethiopian Airlines
30 Sep - 03 Oct	Delta

Also check the deals for one-way flights from Newark 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 Newark to Singapore in September from 657€

Return flights