Cheapest one-way flights from New York to Keflavik in September from 241€

AirHint found the following cheapest one-way flights from New York (LGA) to Keflavik (KEF) in September 2025 (see full year).

One-Way flights

22 Sep Frontier Airlines
26 Sep Frontier Airlines
30 Sep Spirit Airlines
27 Sep Spirit Airlines
07 Sep Frontier Airlines
12 Sep Spirit Airlines
15 Sep Frontier Airlines
24 Sep Frontier Airlines
21 Sep Frontier Airlines
08 Sep Frontier Airlines

Also check the deals for return 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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