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

Return flights

15 Sep - 01 Oct	Delta
19 Sep - 22 Sep	United
19 Sep - 24 Sep	United
10 Sep - 16 Sep	Lufthansa
20 Sep - 18 Oct	United
28 Sep - 05 Oct	United
22 Sep - 06 Oct	United
13 Sep - 17 Sep	Air Canada
21 Sep - 04 Oct	United
27 Sep - 06 Oct	United
20 Sep - 06 Oct	United
19 Sep - 06 Oct	United
14 Sep - 18 Sep	Air Canada
09 Sep - 16 Sep	Air Canada
10 Sep - 18 Sep	Air Canada
14 Sep - 28 Oct	United
14 Sep - 19 Sep	Air Canada
10 Sep - 17 Sep	Air Canada
22 Sep - 18 Oct	United
21 Sep - 28 Sep	United

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 333€

Return flights