Cheapest one-way flights from West Palm Beach to Islip in April from $164

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

One-Way flights

30 Apr Southwest Airlines
04 Apr Frontier Airlines direct
30 Apr jetBlue direct
11 Apr Frontier Airlines direct

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

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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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