Cheapest one-way flights from Boston to Keflavik in December from 338€

AirHint found the following cheapest one-way flights from Boston (BOS) to Keflavik (KEF) in December 2025 (see full year).

One-Way flights

31 Dec Icelandair direct
29 Dec Icelandair direct
28 Dec Icelandair direct
23 Dec Frontier Airlines
22 Dec Spirit Airlines
24 Dec Lufthansa
21 Dec Frontier Airlines
23 Dec Icelandair direct
20 Dec Icelandair direct
21 Dec Icelandair direct

Also check the deals for return flights from Boston to Keflavik in December.

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