Cheapest return flights from Newark to Keflavik in September from $353

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

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

Return flights

23 Sep - 01 Oct KLM
20 Sep - 01 Oct KLM
29 Sep - 07 Oct KLM
30 Sep - 07 Oct Air France
07 Sep - 15 Sep KLM
02 Sep - 08 Sep Air France
02 Sep - 09 Sep Air France
23 Sep - 29 Sep Air France
11 Sep - 16 Sep Air France
09 Sep - 17 Sep Air France
16 Sep - 24 Sep KLM
10 Sep - 16 Sep KLM
17 Sep - 23 Sep KLM
02 Sep - 10 Sep Air France
23 Sep - 01 Oct Icelandair direct
20 Sep - 01 Oct Icelandair direct
29 Sep - 07 Oct Icelandair direct
30 Sep - 07 Oct Icelandair direct
25 Sep - 03 Oct Icelandair direct
27 Sep - 05 Oct Icelandair direct

Also check the deals for one-way 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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