Cheapest return flights from Boston to Keflavik in December from 960€

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

Return flights

21 Dec - 25 Dec Icelandair direct
23 Dec - 25 Dec Frontier Airlines
22 Dec - 24 Dec Icelandair
20 Dec - 24 Dec Icelandair direct
23 Dec - 25 Dec Icelandair direct
24 Dec - 28 Dec Icelandair direct
21 Dec - 28 Dec Icelandair direct
23 Dec - 30 Dec Icelandair
24 Dec - 31 Dec Icelandair
23 Dec - 30 Dec Icelandair direct
20 Dec - 04 Jan Icelandair

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

Powered by

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.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik

Feel free to contact us with any feedback or request another flight research.