Cheapest return flights from Boston to Keflavik in December from $560

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

Return flights

14 Dec - 19 Dec Icelandair direct
14 Dec - 21 Dec Icelandair direct
30 Dec - 09 Jan Icelandair direct
25 Dec - 28 Dec Icelandair direct
26 Dec - 17 Jan Porter Airlines (Canada) Ltd
23 Dec - 17 Jan jetBlue
26 Dec - 17 Jan Icelandair direct
15 Dec - 22 Dec Icelandair direct
17 Dec - 24 Dec Spirit Airlines
16 Dec - 18 Dec Air Canada
17 Dec - 20 Dec Icelandair direct
25 Dec - 29 Dec Icelandair
23 Dec - 17 Jan Icelandair direct
26 Dec - 28 Dec Icelandair direct
18 Dec - 22 Dec Icelandair direct
27 Dec - 03 Jan Porter Airlines (Canada) Ltd
29 Dec - 02 Jan Icelandair
27 Dec - 03 Jan Icelandair direct
29 Dec - 04 Jan Air Canada
27 Dec - 02 Jan Porter Airlines (Canada) Ltd

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.