Cheapest return flights from Newark to Keflavik in September from $491

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

29 Sep - 09 Oct Icelandair direct
02 Sep - 12 Sep Icelandair direct
21 Sep - 30 Sep Icelandair direct
21 Sep - 30 Sep Scandinavian Airlines
13 Sep - 19 Sep Icelandair direct
19 Sep - 26 Sep Icelandair direct
02 Sep - 10 Sep Icelandair direct
06 Sep - 14 Sep Icelandair direct
09 Sep - 14 Sep Scandinavian Airlines
24 Sep - 04 Oct Icelandair direct
09 Sep - 14 Sep Icelandair direct
01 Sep - 20 Sep Icelandair direct

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

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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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