Cheapest return flights from Newark to Keflavik in September from $308

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

Return flights

25 Sep - 03 Oct Icelandair direct
24 Sep - 30 Sep Icelandair direct
16 Sep - 22 Sep Icelandair direct
15 Sep - 19 Sep Icelandair direct
25 Sep - 30 Sep Icelandair direct
24 Sep - 02 Oct Icelandair direct
29 Sep - 07 Oct Icelandair direct
30 Sep - 08 Oct Icelandair direct
25 Sep - 02 Oct Icelandair direct
22 Sep - 01 Oct Icelandair direct
20 Sep - 25 Sep Icelandair direct
17 Sep - 06 Oct Icelandair direct
28 Sep - 04 Oct Icelandair direct
22 Sep - 26 Sep Icelandair direct
17 Sep - 25 Sep Icelandair direct
22 Sep - 30 Sep Icelandair direct
21 Sep - 25 Sep Icelandair direct
27 Sep - 04 Oct Icelandair direct
28 Sep - 06 Oct Icelandair direct
08 Sep - 15 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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