Cheapest one-way flights from Boston to Keflavik in December from $256

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

One-Way flights

05 Dec Air Canada
10 Dec Air Canada
08 Dec jetBlue
11 Dec Air Canada
04 Dec Air Canada
08 Dec Icelandair direct
14 Dec Icelandair direct
04 Dec Icelandair direct
13 Dec Icelandair direct
05 Dec Icelandair direct

Also check the deals for return 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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