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

Return flights

10 Sep - 31 Oct	Air Canada
03 Sep - 25 Sep	Air Canada
03 Sep - 07 Sep	Air Canada
02 Sep - 09 Sep	KLM
30 Sep - 07 Oct	Air Canada
12 Sep - 19 Sep	Air Canada
09 Sep - 23 Sep	Delta
01 Sep - 10 Sep	Delta
14 Sep - 25 Sep	Delta
01 Sep - 09 Sep	Delta
03 Sep - 11 Sep	Delta
09 Sep - 25 Sep	Air France
28 Sep - 12 Oct	Air Canada
08 Sep - 04 Oct	United
11 Sep - 04 Oct	United
08 Sep - 13 Oct	United
28 Sep - 31 Oct	Delta
28 Sep - 31 Oct	Aer Lingus	direct
22 Sep - 06 Oct	Aer Lingus	direct
20 Sep - 06 Oct	Aer Lingus	direct

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 284€

Return flights