AirHint found the following cheapest return flights from Newark (EWR) to Keflavik (KEF) in December 2026 (see full year).
Return flights
| 01 Dec - 12 Dec | Icelandair | direct | |
| 27 Dec - 30 Dec | Icelandair | direct | |
| 15 Dec - 21 Dec | British Airways | ||
| 25 Dec - 30 Dec | British Airways |
Also check the deals for one-way flights from Newark to Keflavik in December.
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