Cheapest return flights from Boston to Keflavik in December from 292€

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

Return flights

10 Dec - 17 Dec Icelandair direct
19 Dec - 24 Dec Icelandair direct
20 Dec - 27 Dec Icelandair direct
30 Dec - 06 Jan Icelandair direct
21 Dec - 28 Dec United
20 Dec - 04 Jan United
06 Dec - 13 Dec United
26 Dec - 03 Jan United

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

Skyscanner

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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