Cheapest return flights from Islip to West Palm Beach in April from $478
AirHint found the following cheapest return flights from Islip (ISP) to West Palm Beach (PBI) in April 2025 (see full year).
Return flights
| 10 Apr - 13 Apr | Frontier Airlines | direct | |
| 17 Apr - 20 Apr | Frontier Airlines | direct | |
| 11 Apr - 20 Apr | Frontier Airlines | direct |
Also check the deals for one-way flights from Islip to West Palm Beach in April.
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.
