Cheapest return flights from Boston to Keflavik in December from $276

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

Return flights

04 Dec - 14 Dec Icelandair direct
04 Dec - 09 Dec Icelandair direct
01 Dec - 06 Dec Icelandair direct
08 Dec - 22 Dec Icelandair direct
15 Dec - 20 Dec Icelandair direct
11 Dec - 25 Dec Icelandair direct
17 Dec - 23 Dec Icelandair direct
18 Dec - 24 Dec Icelandair direct
20 Dec - 23 Dec Icelandair direct
25 Dec - 17 Jan Icelandair direct
24 Dec - 12 Jan Icelandair direct
09 Dec - 03 Jan Icelandair direct
19 Dec - 26 Dec Icelandair direct
25 Dec - 08 Jan Icelandair direct
22 Dec - 05 Jan Icelandair direct
28 Dec - 04 Jan Icelandair direct
19 Dec - 05 Jan Icelandair direct
30 Dec - 06 Jan Icelandair direct
25 Dec - 02 Jan Icelandair direct
25 Dec - 01 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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