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

Return flights

12 Sep - 24 Sep	Air Canada
09 Sep - 16 Sep	Lufthansa
08 Sep - 15 Sep	Lufthansa
05 Sep - 08 Sep	Lufthansa
10 Sep - 20 Sep	Air Canada
10 Sep - 17 Sep	Lufthansa
03 Sep - 10 Sep	Lufthansa
12 Sep - 15 Sep	Air Canada
12 Sep - 23 Sep	Air Canada
03 Sep - 16 Sep	Lufthansa
10 Sep - 02 Oct	Lufthansa
30 Sep - 07 Oct	Lufthansa
29 Sep - 06 Oct	United
28 Sep - 05 Oct	United
27 Sep - 20 Oct	Delta
18 Sep - 13 Oct	United
27 Sep - 04 Oct	United
27 Sep - 05 Oct	United
24 Sep - 01 Oct	Air Canada
26 Sep - 06 Oct	American Airlines

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 $352

Return flights