$43 Cheap Frontier Airlines flights Islip (ISP) to Fort Lauderdale (FLL)

Scoring cheap one-way Frontier Airlines flights from ISP to FLL from $43 on Expedia is a cinch — just filter by “Price (lowest to highest).” Or check out our affordable round-trip fares from $81 for your next exciting vacation.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines flights to Fort Lauderdale are often more affordable in the low-season months of September and October. Whether you’re in search of a round-trip or one-way ticket, you could find a better deal then.

For cheap Frontier Airlines fares from MacArthur Airport (ISP) to Fort Lauderdale - Hollywood Intl. Airport (FLL), start searching one to three months before your intended departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also impact the price you pay. Sunday is typically the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your flight on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Click on our “Nonstop” filter when looking for direct Frontier Airlines flights from ISP to FLL. It’s also an easy way to compare other airlines servicing the same nonstop trip.

To find the earliest departures from ISP to FLL with Frontier Airlines, filter your results by “Morning” and “Early Morning.” Choosing an early flight usually means cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Catch a Frontier Airlines flight from MacArthur Airport (ISP) to Fort Lauderdale, and you’ll likely land at Fort Lauderdale - Hollywood Intl. Airport (FLL). This is the airline’s main hub in this destination.

A rewarding loyalty program and the opportunity to collect points through Frontier Miles are the start of the reasons to jet off from ISP to FLL with Frontier Airlines. Plus, when you sign up to our One Key™ program, you can earn OneKeyCash™* in addition to any airline loyalty program earnings. It’s yours to spend on future travel plans.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are generally free within 24 hours of making a booking, but your airline may charge a fee after that. For more information about modifying your flights, check out your “Trips,” select your flight and click on “Manage Booking.” If you’d like the freedom to update your itinerary without additional costs, apply the “No cancel fee” or “Changes included” filter when organizing your next adventure.