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

Return flights

09 Sep - 23 Sep	Delta
04 Sep - 11 Sep	Delta
03 Sep - 11 Sep	Delta
15 Sep - 22 Sep	Delta
01 Sep - 08 Sep	Delta
03 Sep - 10 Sep	Delta
09 Sep - 16 Sep	Korean Air
24 Sep - 29 Oct	United
30 Sep - 07 Oct	United
11 Sep - 24 Sep	United
10 Sep - 17 Sep	United
02 Sep - 02 Oct	United
15 Sep - 30 Sep	Delta
21 Sep - 09 Oct	United
24 Sep - 05 Oct	United
25 Sep - 05 Oct	United
27 Sep - 06 Oct	Delta
24 Sep - 08 Oct	SWISS
22 Sep - 05 Oct	SWISS
01 Sep - 01 Oct	British Airways

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