Cheapest return flights from New York to Keflavik in September from $361

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

Return flights

15 Sep - 23 Sep Icelandair direct
21 Sep - 25 Sep Icelandair direct
03 Sep - 10 Sep Icelandair direct
11 Sep - 16 Sep Icelandair direct
14 Sep - 20 Sep Icelandair direct
04 Sep - 08 Sep Icelandair direct
11 Sep - 15 Sep Icelandair direct
01 Sep - 27 Sep Icelandair direct
23 Sep - 30 Sep Icelandair direct
25 Sep - 30 Sep Icelandair direct
25 Sep - 03 Oct Icelandair direct
30 Sep - 08 Oct Icelandair direct
27 Sep - 11 Oct jetBlue
26 Sep - 04 Oct jetBlue
29 Sep - 06 Oct Icelandair direct
21 Sep - 11 Oct jetBlue
27 Sep - 18 Oct Air Canada
22 Sep - 18 Oct Air Canada
30 Sep - 05 Oct Spirit Airlines
10 Sep - 04 Oct Air Canada

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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