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

Return flights

12 Jan - 18 Jan	Icelandair	direct
08 Jan - 11 Jan	Icelandair	direct
11 Jan - 25 Jan	Icelandair	direct
02 Jan - 09 Jan	Icelandair	direct
02 Jan - 06 Jan	Icelandair	direct
11 Jan - 14 Jan	Scandinavian Airlines
13 Jan - 16 Jan	Scandinavian Airlines
11 Jan - 14 Jan	Icelandair	direct
13 Jan - 16 Jan	Icelandair	direct
03 Jan - 10 Jan	Lufthansa

Also check the deals for one-way flights from Newark 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 Newark to Keflavik in January from 323€

Return flights