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

One-Way flights

15 Sep	Scandinavian Airlines
23 Sep	Porter Airlines (Canada) Ltd
13 Sep	Air Canada
10 Sep	Delta
07 Sep	Delta
08 Sep	Delta
20 Sep	Porter Airlines (Canada) Ltd
28 Sep	Air Canada
16 Sep	Lufthansa
19 Sep	Air Canada

Also check the deals for return 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 one-way flights from New York to Dublin in September from 233€

One-Way flights