AirHint found the following cheapest one-way flights from Newark (EWR) to Keflavik (KEF) in December 2025 (see full year).
One-Way flights
| 01 Dec | Aer Lingus | ||
| 12 Dec | Spirit Airlines | ||
| 09 Dec | Air Canada | ||
| 11 Dec | Air Canada | ||
| 10 Dec | Aer Lingus | ||
| 04 Dec | Aer Lingus | ||
| 08 Dec | TAP | ||
| 05 Dec | FrenchBee | ||
| 04 Dec | Icelandair | direct | |
| 16 Dec | Icelandair | direct |
Also check the deals for return flights from Newark to Keflavik in December.
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.
Find us on social media