Cheapest one-way flights from Newark to Keflavik in September from $233

Best time to book flights for Newark (EWR) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest one-way flights from Newark (EWR) to Keflavik (KEF) in September 2025 (see full year).

One-Way flights

23 Sep Spirit Airlines
06 Sep FrenchBee
05 Sep FrenchBee
17 Sep Spirit Airlines
11 Sep Spirit Airlines
22 Sep FrenchBee
10 Sep Icelandair direct
09 Sep Icelandair direct
06 Sep Icelandair direct
17 Sep Icelandair direct

Also check the deals for return flights from Newark to Keflavik in September.

Skyscanner

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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