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

Return flights

09 Sep - 25 Sep	SWISS
10 Sep - 20 Sep	SWISS
12 Sep - 20 Sep	Air Canada
10 Sep - 17 Sep	Air Canada
09 Sep - 14 Sep	Aer Lingus	direct
07 Sep - 14 Sep	Air Canada
12 Sep - 19 Sep	Air Canada
13 Sep - 20 Sep	SWISS
04 Sep - 11 Sep	Aer Lingus	direct
02 Sep - 06 Sep	Aer Lingus	direct
12 Sep - 10 Oct	Air Canada
28 Sep - 05 Oct	Icelandair
10 Sep - 31 Oct	SWISS
24 Sep - 01 Oct	SWISS
25 Sep - 02 Oct	SWISS
15 Sep - 02 Oct	Scandinavian Airlines
27 Sep - 04 Oct	Delta
27 Sep - 04 Oct	United	direct
26 Sep - 01 Oct	American Airlines
26 Sep - 02 Oct	American Airlines

Also check the deals for one-way flights from Newark to Dublin 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 Dublin in September from $358

Return flights