AirHint found the following cheapest return flights from West Palm Beach (PBI) to Islip (ISP) in August 2025 (see full year).
Return flights
| 01 Aug - 03 Aug | Southwest Airlines | direct | |
| 22 Aug - 22 Aug | jetBlue | direct | |
| 03 Aug - 10 Aug | jetBlue | direct |
Also check the deals for one-way flights from West Palm Beach to Islip in August.
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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