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

Return flights

01 Dec - 08 Dec	Air Canada
05 Dec - 12 Dec	United
04 Dec - 07 Dec	United
03 Dec - 10 Dec	United
08 Dec - 15 Dec	United
30 Dec - 23 Jan	United
06 Dec - 13 Dec	Air Canada
04 Dec - 08 Dec	Air Canada
04 Dec - 11 Dec	United
02 Dec - 09 Dec	United
09 Dec - 16 Dec	United
15 Dec - 11 Jan	United
13 Dec - 11 Jan	United
31 Dec - 07 Jan	United
16 Dec - 10 Jan	United
25 Dec - 05 Jan	Lufthansa
29 Dec - 05 Jan	United
26 Dec - 05 Jan	Air Canada
25 Dec - 01 Jan	United
14 Dec - 03 Jan	Delta

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 274€

Return flights