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

Return flights

28 Sep - 02 Oct	Icelandair
16 Sep - 20 Sep	Icelandair
23 Sep - 29 Sep	Icelandair
29 Sep - 09 Oct	Scandinavian Airlines
16 Sep - 21 Sep	United
12 Sep - 17 Sep	United
12 Sep - 19 Sep	United
18 Sep - 25 Sep	Air Canada
22 Sep - 18 Oct	Scandinavian Airlines
12 Sep - 16 Sep	United
09 Sep - 04 Oct	United
30 Sep - 07 Oct	Lufthansa
10 Sep - 04 Oct	United
25 Sep - 02 Oct	United
28 Sep - 05 Oct	United
11 Sep - 14 Sep	United
18 Sep - 28 Sep	United
18 Sep - 21 Sep	United
11 Sep - 04 Oct	United
15 Sep - 11 Oct	Scandinavian Airlines

Also check the deals for one-way flights from Newark to Copenhagen 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 Copenhagen in September from 401€

Return flights