Cheapest return flights from New York to Keflavik in September from $449

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

24 Sep - 04 Oct Delta direct
29 Sep - 09 Oct Delta direct
21 Sep - 02 Oct Delta direct
29 Sep - 07 Oct Air France direct
10 Sep - 25 Sep Delta direct
02 Sep - 10 Sep Delta direct
07 Sep - 18 Sep Delta direct
22 Sep - 30 Sep Air France direct
04 Sep - 12 Sep Air France direct
15 Sep - 22 Sep Air France direct
06 Sep - 15 Sep Air France direct
08 Sep - 20 Sep Icelandair direct
06 Sep - 14 Sep Icelandair direct
06 Sep - 20 Sep Icelandair direct
25 Sep - 05 Oct Icelandair 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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