Cheap Frontier Airlines flights Islip (ISP) to Fort Myers (RSW)

Set the “Price (lowest to highest)” filter on Expedia to find cheap Frontier Airlines round-trip flights from ISP to RSW. Affordable one-way fares are also on offer.**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.

Search for round-trip or one-way flights to Fort Myers in August or September. You could find a cheap fare with Frontier Airlines during these off-peak travel months.

Start searching one to three months before your departure to find cheaper fares on Frontier Airlines flights from MacArthur Airport (ISP) to Southwest Florida Intl. Airport (RSW). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Get your timing right, and you can enjoy significant savings on domestic trips.*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.

To see if there’s a direct journey from ISP to RSW with Frontier Airlines or another airline, select the “Nonstop” filter when browsing for flights.

Filter your results by “Early Morning” and “Morning” to find the earliest flights from ISP to RSW. Heading off early means you’re less likely to experience cancellations.**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.

Frontier Airlines flights from MacArthur Airport (ISP) to Fort Myers come in to land at Southwest Florida Intl. Airport (RSW). This is the main entry point to this city.

With a rewarding loyalty program, Frontier Airlines is a favorite of many passengers departing from ISP to RSW. Plus, if you’re a Frontier Miles and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights on top of your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are typically free within 24 hours of booking, but your airline may add a charge after that. For more information about modifying your reservation, head to your “Trips,” select your flight and click on “Manage Booking.” If you want the flexibility to make changes without extra charges, tick the “No cancel fee” or “Changes included” filter when organizing your next adventure.