Cheapest return flights from West Palm Beach to Islip in December from 114€

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

Return flights

11 Dec - 16 Dec Frontier Airlines direct
11 Dec - 14 Dec Frontier Airlines direct
11 Dec - 18 Dec Frontier Airlines direct
23 Dec - 30 Dec Frontier Airlines direct
10 Dec - 17 Dec Southwest Airlines direct
19 Dec - 20 Dec Southwest Airlines
19 Dec - 21 Dec Southwest Airlines
22 Dec - 25 Dec Frontier Airlines direct
22 Dec - 22 Dec Southwest Airlines

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

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