AirHint found the following cheapest return flights from Shannon (SNN) to New York (JFK) in December 2025 (see full year).

Return flights

16 Dec - 31 Dec	Aer Lingus	direct
23 Dec - 30 Dec	British Airways
24 Dec - 31 Dec	British Airways
16 Dec - 05 Jan	Aer Lingus
08 Dec - 12 Dec	Aer Lingus	direct
07 Dec - 10 Dec	British Airways
21 Dec - 30 Dec	British Airways
10 Dec - 14 Dec	Aer Lingus
11 Dec - 14 Dec	Aer Lingus
08 Dec - 11 Dec	Aer Lingus	direct
07 Dec - 11 Dec	Aer Lingus	direct
19 Dec - 06 Jan	Aer Lingus
18 Dec - 05 Jan	Aer Lingus
17 Dec - 04 Jan	Ryanair
22 Dec - 03 Jan	Aer Lingus
29 Dec - 05 Jan	Ryanair
23 Dec - 03 Jan	Ryanair
17 Dec - 04 Jan	Aer Lingus	direct
26 Dec - 01 Jan	British Airways
28 Dec - 04 Jan	Ryanair

Also check the deals for one-way flights from Shannon to New York 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 Shannon to New York in December from $612

Return flights