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

Return flights

23 Sep - 28 Oct	Aer Lingus
23 Sep - 09 Oct	Aer Lingus
22 Sep - 30 Sep	Aer Lingus
23 Sep - 02 Oct	Air France
24 Sep - 08 Oct	Aer Lingus
30 Sep - 16 Oct	Aer Lingus
21 Sep - 06 Oct	Icelandair
23 Sep - 28 Oct	Aer Lingus	direct
24 Sep - 10 Oct	Aer Lingus
23 Sep - 10 Oct	Aer Lingus
21 Sep - 30 Sep	Aer Lingus
29 Sep - 03 Oct	Icelandair
21 Sep - 26 Sep	Icelandair
17 Sep - 23 Sep	Air Canada
26 Sep - 30 Sep	Aer Lingus
23 Sep - 28 Sep	Aer Lingus
21 Sep - 26 Sep	jetBlue	direct
15 Sep - 19 Sep	Air Canada
16 Sep - 19 Sep	United
17 Sep - 19 Sep	Air Canada

Also check the deals for one-way flights from New York 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 New York to Dublin in September from 323€

Return flights