Cheapest return flights from Islip to West Palm Beach in December from $164

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

Return flights

21 Dec - 25 Dec Frontier Airlines direct
13 Dec - 16 Dec Frontier Airlines direct
18 Dec - 25 Dec Frontier Airlines direct
11 Dec - 16 Dec Frontier Airlines direct
19 Dec - 20 Dec Frontier Airlines direct
22 Dec - 25 Dec Frontier Airlines direct
31 Dec - 05 Jan Frontier Airlines direct
21 Dec - 24 Dec Frontier Airlines direct
14 Dec - 18 Dec Frontier Airlines direct
07 Dec - 18 Dec Frontier Airlines direct
22 Dec - 24 Dec Frontier Airlines direct
14 Dec - 05 Jan Frontier Airlines direct
27 Dec - 11 Jan Frontier Airlines direct
18 Dec - 04 Jan Frontier Airlines direct
31 Dec - 03 Jan Frontier Airlines direct
31 Dec - 04 Jan Frontier Airlines direct
24 Dec - 01 Jan Frontier Airlines direct
26 Dec - 05 Jan Southwest Airlines
23 Dec - 01 Jan Frontier Airlines direct
26 Dec - 05 Jan Frontier Airlines direct

Also check the deals for one-way flights from Islip to West Palm Beach 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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