Cheapest return flights from New York to Keflavik in September from $312

Best time to book flights for New York (JFK) to Keflavik (KEF) flights at AirHint

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

Return flights

29 Sep - 06 Oct Icelandair direct
25 Sep - 02 Oct Icelandair direct
19 Sep - 23 Sep Icelandair direct
14 Sep - 20 Sep Icelandair direct
03 Sep - 08 Sep Icelandair direct
04 Sep - 11 Sep Icelandair direct
13 Sep - 20 Sep Icelandair direct
20 Sep - 25 Sep Icelandair direct
22 Sep - 28 Sep Icelandair direct
01 Sep - 09 Sep Icelandair direct
19 Sep - 24 Sep Icelandair direct
21 Sep - 28 Sep Icelandair direct
25 Sep - 01 Oct Icelandair direct
30 Sep - 06 Oct Icelandair direct
26 Sep - 02 Oct Icelandair direct
27 Sep - 03 Oct Icelandair direct
21 Sep - 02 Oct Icelandair direct
23 Sep - 01 Oct Icelandair direct
28 Sep - 06 Oct Icelandair direct
29 Sep - 10 Oct Icelandair direct

Also check the deals for one-way flights from New York 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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