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

Return flights

02 Dec - 07 Dec	Air Canada
03 Dec - 11 Dec	Delta
02 Dec - 10 Dec	Delta
02 Dec - 16 Dec	Delta
05 Dec - 08 Dec	United
04 Dec - 07 Dec	Air Canada
25 Dec - 21 Jan	Air Canada
30 Dec - 24 Jan	United
31 Dec - 24 Jan	United
14 Dec - 11 Jan	United
15 Dec - 11 Jan	United
14 Dec - 27 Dec	United
31 Dec - 07 Jan	United
14 Dec - 09 Jan	United
14 Dec - 01 Jan	United
29 Dec - 05 Jan	Delta
16 Dec - 15 Jan	United
15 Dec - 21 Dec	United
24 Dec - 31 Dec	United
16 Dec - 27 Dec	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 279€

Return flights