Cheapest return flights from Newark to Keflavik in September from $348

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

Return flights

24 Sep - 01 Oct Icelandair direct
28 Sep - 03 Oct Icelandair direct
21 Sep - 01 Oct Icelandair direct
25 Sep - 03 Oct Icelandair direct
22 Sep - 01 Oct Icelandair direct
25 Sep - 02 Oct Icelandair direct
30 Sep - 14 Oct Icelandair direct
21 Sep - 25 Sep Icelandair direct
21 Sep - 26 Sep Icelandair direct
16 Sep - 21 Sep Icelandair direct
04 Sep - 08 Sep Icelandair direct
17 Sep - 21 Sep Icelandair direct
14 Sep - 21 Sep Icelandair direct
13 Sep - 21 Sep Icelandair direct
18 Sep - 21 Sep Icelandair direct
18 Sep - 23 Sep Icelandair direct
15 Sep - 19 Sep Icelandair direct
25 Sep - 04 Oct Air Canada
26 Sep - 04 Oct Air Canada
29 Sep - 13 Oct Delta

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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