Cheapest return flights from New York to Keflavik in December from $463

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

Return flights

06 Dec - 13 Dec Spirit Airlines
10 Dec - 15 Dec Spirit Airlines
08 Dec - 15 Dec Spirit Airlines
12 Dec - 16 Dec Spirit Airlines
07 Dec - 13 Dec Spirit Airlines
06 Dec - 12 Dec Spirit Airlines
15 Dec - 20 Dec Spirit Airlines
08 Dec - 16 Dec Spirit Airlines
05 Dec - 07 Dec Air Canada
08 Dec - 12 Dec Air Canada
31 Dec - 07 Jan Air Canada
31 Dec - 06 Jan Spirit Airlines
17 Dec - 10 Jan Spirit Airlines
15 Dec - 10 Jan Spirit Airlines
30 Dec - 24 Jan Frontier Airlines
27 Dec - 17 Jan Porter Airlines (Canada) Ltd
22 Dec - 17 Jan Spirit Airlines
18 Dec - 10 Jan Spirit Airlines
24 Dec - 17 Jan Lufthansa
28 Dec - 17 Jan Spirit Airlines

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

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