Cheapest return flights from Boston to Keflavik in December from $300

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

Return flights

04 Dec - 11 Dec Icelandair direct
07 Dec - 14 Dec Icelandair direct
02 Dec - 10 Dec Icelandair direct
11 Dec - 18 Dec Icelandair direct
09 Dec - 18 Dec Icelandair direct
16 Dec - 20 Dec Icelandair direct
23 Dec - 29 Dec Icelandair direct
23 Dec - 30 Dec Icelandair direct
23 Dec - 01 Jan Icelandair direct
26 Dec - 02 Jan Icelandair direct
21 Dec - 28 Dec Icelandair direct
28 Dec - 04 Jan Icelandair direct
28 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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