Cheapest return flights from New York to Keflavik in December from $359

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

Return flights

01 Dec - 15 Dec Icelandair direct
08 Dec - 15 Dec Icelandair direct
02 Dec - 08 Dec Icelandair direct
03 Dec - 08 Dec Icelandair direct
02 Dec - 09 Dec Icelandair direct
02 Dec - 10 Dec Icelandair direct
06 Dec - 14 Dec Icelandair direct
09 Dec - 14 Dec Icelandair direct
04 Dec - 09 Dec Icelandair direct
09 Dec - 13 Dec Icelandair direct
29 Dec - 11 Jan Finnair
30 Dec - 06 Jan Finnair
29 Dec - 06 Jan Finnair
30 Dec - 08 Jan Finnair
30 Dec - 07 Jan Finnair
09 Dec - 03 Jan Icelandair direct
29 Dec - 05 Jan Icelandair direct
29 Dec - 11 Jan Icelandair direct
29 Dec - 06 Jan Icelandair direct
30 Dec - 06 Jan Icelandair direct

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

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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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