Cheapest return flights from New York to Keflavik in September from $408

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

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

Return flights

29 Sep - 06 Oct KLM
08 Sep - 15 Sep Air France
15 Sep - 22 Sep Air France
22 Sep - 29 Sep KLM
02 Sep - 09 Sep Air France
02 Sep - 10 Sep Air France
14 Sep - 21 Sep Air Canada
08 Sep - 18 Sep Air Canada
17 Sep - 29 Sep Air Canada
07 Sep - 14 Sep Air Canada
11 Sep - 18 Sep United
26 Sep - 04 Oct United

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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