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

Return flights

02 Jan - 15 Jan	Icelandair	direct
07 Jan - 14 Jan	Icelandair	direct
24 Jan - 31 Jan	United
09 Jan - 23 Jan	British Airways
30 Jan - 13 Feb	British Airways
19 Jan - 23 Jan	United
02 Jan - 08 Jan	United

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 261€

Return flights