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

Return flights

04 Dec - 08 Dec	Lufthansa
02 Dec - 10 Dec	United
05 Dec - 07 Dec	United
04 Dec - 07 Dec	United
03 Dec - 08 Dec	United
01 Dec - 07 Dec	United
13 Dec - 17 Jan	United
31 Dec - 24 Jan	United
08 Dec - 15 Dec	United
29 Dec - 24 Jan	United
08 Dec - 16 Dec	Delta
11 Dec - 14 Dec	United
04 Dec - 09 Dec	Delta
30 Dec - 24 Jan	United
23 Dec - 17 Jan	Air Canada
14 Dec - 10 Jan	Air Canada
22 Dec - 17 Jan	United
13 Dec - 09 Jan	United
27 Dec - 17 Jan	Air Canada
15 Dec - 10 Jan	United

Also check the deals for one-way flights from New York to Dublin in December.

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 December from $315

Return flights