Cheapest one-way flights from West Palm Beach to Islip in December from 25€

AirHint found the following cheapest one-way flights from West Palm Beach (PBI) to Islip (ISP) in December 2025 (see full year).

One-Way flights

06 Dec Frontier Airlines direct
09 Dec Frontier Airlines direct
04 Dec Frontier Airlines direct
16 Dec Frontier Airlines direct
21 Dec Frontier Airlines direct
22 Dec Frontier Airlines direct
24 Dec Frontier Airlines direct
25 Dec Frontier Airlines direct
26 Dec Frontier Airlines direct
29 Dec Frontier Airlines direct

Also check the deals for return flights from West Palm Beach to Islip in December.

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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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