AirHint found the following cheapest return flights from New York (NYC) to Dublin (DUB) in September 2026 (see full year).

Return flights

08 Sep - 06 Oct	Air Canada
07 Sep - 06 Oct	Air Canada
18 Sep - 27 Sep	Air Canada
15 Sep - 23 Sep	Air Canada
08 Sep - 16 Sep	United
03 Sep - 11 Sep	Aer Lingus	direct
04 Sep - 12 Sep	Aer Lingus	direct
08 Sep - 16 Sep	Aer Lingus	direct
03 Sep - 06 Sep	Aer Lingus	direct
04 Sep - 07 Sep	Aer Lingus	direct
06 Sep - 13 Sep	Aer Lingus	direct
07 Sep - 14 Sep	Aer Lingus	direct
28 Sep - 01 Oct	Aer Lingus	direct
29 Sep - 03 Oct	United
29 Sep - 03 Oct	Brussels Airlines	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 298€

Return flights