Cheapest return flights from Keflavik to Newburgh in September from $310

Best time to book flights for Keflavik (KEF) to Newburgh (SWF) flights at AirHint

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

Return flights

15 Sep - 22 Sep Fly Play direct
03 Sep - 03 Sep Fly Play direct
20 Sep - 29 Sep Fly Play direct
17 Sep - 23 Sep Fly Play direct
26 Sep - 15 Oct Fly Play direct
29 Sep - 04 Oct Fly Play direct
10 Sep - 14 Sep Fly Play direct
01 Sep - 07 Sep Fly Play direct
10 Sep - 17 Sep Fly Play direct
13 Sep - 27 Sep Fly Play direct
01 Sep - 14 Sep Fly Play direct

Also check the deals for one-way flights from Keflavik to Newburgh 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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