Cheapest return flights from New York to Keflavik in December from 398€

AirHint found the following cheapest return flights from New York (NYC) to Keflavik (KEF) in December 2025 (see full year).

Return flights

31 Dec - 10 Jan SWISS
31 Dec - 10 Jan Icelandair direct
30 Dec - 08 Jan Lufthansa
28 Dec - 07 Jan Icelandair
31 Dec - 06 Jan SWISS
30 Dec - 06 Jan Lufthansa
30 Dec - 08 Jan Icelandair direct
28 Dec - 01 Jan Spirit Airlines
26 Dec - 28 Dec Air Europa
31 Dec - 05 Jan Icelandair
30 Dec - 06 Jan Icelandair direct
26 Dec - 28 Dec Icelandair direct
25 Dec - 29 Dec Icelandair direct
26 Dec - 30 Dec Finnair

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

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