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

Return flights

04 Sep - 20 Sep	TAP
09 Sep - 23 Sep	TAP
22 Sep - 06 Oct	TAP
11 Sep - 21 Sep	TAP
15 Sep - 23 Sep	TAP
11 Sep - 20 Sep	TAP
09 Sep - 17 Sep	TAP
09 Sep - 18 Sep	TAP
10 Sep - 16 Sep	TAP
08 Sep - 14 Sep	TAP
04 Sep - 08 Sep	TAP
19 Sep - 05 Oct	Icelandair
17 Sep - 04 Oct	Icelandair
30 Sep - 07 Oct	United	direct
25 Sep - 02 Oct	Icelandair
22 Sep - 06 Oct	United	direct
25 Sep - 02 Oct	United	direct
19 Sep - 05 Oct	United	direct
29 Sep - 01 Oct	Delta

Also check the deals for one-way flights from Newark to Amsterdam 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 Amsterdam in September from $416

Return flights