Cheapest return flights from New York to Keflavik in September from $367

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

27 Sep - 07 Oct Icelandair direct
15 Sep - 19 Sep Icelandair direct
16 Sep - 25 Sep Icelandair direct
06 Sep - 10 Sep Icelandair direct
12 Sep - 16 Sep Icelandair direct
02 Sep - 09 Sep Icelandair direct
11 Sep - 22 Sep Icelandair direct
07 Sep - 14 Sep Icelandair direct
06 Sep - 14 Sep Icelandair direct
06 Sep - 15 Sep Icelandair direct
14 Sep - 21 Sep Icelandair direct
29 Sep - 06 Oct Delta direct

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