Cheapest return flights from New York to Keflavik in December from $403

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

Return flights

31 Dec - 10 Jan SWISS
08 Dec - 15 Dec Finnair
31 Dec - 11 Jan Finnair
04 Dec - 09 Dec SWISS
03 Dec - 09 Dec Icelandair direct
29 Dec - 22 Jan Icelandair direct
09 Dec - 14 Dec Icelandair direct
14 Dec - 18 Dec Icelandair direct
09 Dec - 13 Dec Icelandair direct
30 Dec - 24 Jan Icelandair direct
03 Dec - 08 Dec Icelandair direct
02 Dec - 08 Dec Scandinavian Airlines
01 Dec - 07 Dec Lufthansa
07 Dec - 11 Dec jetBlue
28 Dec - 17 Jan Finnair
31 Dec - 10 Jan Icelandair direct
31 Dec - 11 Jan Icelandair direct
15 Dec - 10 Jan Scandinavian Airlines
15 Dec - 10 Jan Icelandair direct
29 Dec - 06 Jan Icelandair direct

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

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