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

Return flights

30 Sep - 16 Oct	Iberia
24 Sep - 01 Oct	Aer Lingus
28 Sep - 09 Oct	jetBlue	direct
28 Sep - 05 Oct	Aer Lingus
30 Sep - 17 Oct	jetBlue
21 Sep - 30 Sep	Aer Lingus
22 Sep - 01 Oct	Aer Lingus
22 Sep - 06 Oct	Aer Lingus	direct
23 Sep - 02 Oct	jetBlue
23 Sep - 10 Oct	jetBlue
20 Sep - 06 Oct	jetBlue
21 Sep - 26 Sep	Aer Lingus	direct
21 Sep - 23 Sep	Air Canada
23 Sep - 30 Sep	Air Canada
21 Sep - 23 Sep	jetBlue	direct
26 Sep - 30 Sep	Aer Lingus
23 Sep - 26 Sep	jetBlue
20 Sep - 24 Sep	Air Canada
20 Sep - 26 Sep	jetBlue
26 Sep - 28 Sep	jetBlue	direct

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 $380

Return flights