AirHint found the following cheapest return flights from Boston (BOS) to Keflavik (KEF) in January 2026 (see full year).

Return flights

02 Jan - 09 Jan	Icelandair	direct
22 Jan - 26 Jan	Icelandair	direct
14 Jan - 18 Jan	Icelandair	direct
12 Jan - 19 Jan	Icelandair	direct
22 Jan - 29 Jan	Icelandair	direct
15 Jan - 19 Jan	Icelandair	direct
17 Jan - 24 Jan	Icelandair	direct
05 Jan - 11 Jan	Icelandair	direct

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

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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Cheapest return flights from Boston to Keflavik in January from 319€

Return flights