Cheapest return flights from Boston to Keflavik in December from $331

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

Return flights

10 Dec - 15 Dec Icelandair direct
08 Dec - 12 Dec Icelandair direct
12 Dec - 17 Dec Icelandair direct
13 Dec - 23 Jan Icelandair direct
05 Dec - 09 Dec Icelandair direct
05 Dec - 08 Dec Icelandair direct
01 Dec - 08 Dec Icelandair direct
02 Dec - 09 Dec Icelandair direct
05 Dec - 12 Dec Icelandair direct
08 Dec - 15 Dec Icelandair direct
07 Dec - 12 Dec Icelandair direct
16 Dec - 10 Jan Icelandair direct
21 Dec - 10 Jan Icelandair direct
19 Dec - 10 Jan Icelandair direct
25 Dec - 17 Jan Icelandair direct
31 Dec - 07 Jan Icelandair direct
30 Dec - 06 Jan Icelandair direct
29 Dec - 05 Jan Icelandair direct
10 Dec - 03 Jan Icelandair direct
08 Dec - 03 Jan Icelandair direct

Also check the deals for one-way flights from Boston 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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