Cheapest one-way flights from Islip to West Palm Beach in April from $131

AirHint found the following cheapest one-way flights from Islip (ISP) to West Palm Beach (PBI) in April 2026 (see full year).

One-Way flights

10 Apr Frontier Airlines direct
13 Apr Frontier Airlines direct
03 Apr Frontier Airlines direct

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

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