Cheapest return flights from Newark to Keflavik in September from 375€

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

Return flights

07 Sep - 14 Sep KLM
07 Sep - 18 Sep KLM
09 Sep - 18 Sep KLM
21 Sep - 29 Sep KLM
05 Sep - 09 Sep Delta
05 Sep - 19 Sep Delta
15 Sep - 29 Sep Delta
11 Sep - 16 Sep KLM
21 Sep - 29 Sep Icelandair direct
15 Sep - 29 Sep Icelandair direct
28 Sep - 07 Oct Icelandair direct
29 Sep - 17 Oct Icelandair direct

Also check the deals for one-way flights from Newark to Keflavik in September.

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