$101 Cheap Southwest Airlines flights Islip (ISP) to Fort Myers (RSW)

Landing cheap one-way Southwest Airlines flights from ISP to RSW from $101 on Expedia is simple — just filter by "Price (lowest to highest)." Or check out our affordable return fares from $167 for your next getaway.**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.

To find cheap Southwest Airlines fares from MacArthur Airport (ISP) to Southwest Florida Intl. Airport (RSW), 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 generally 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.

To find the earliest departures from ISP to RSW with Southwest Airlines, filter your search by "Morning" and "Early Morning." Booking an early flight generally 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.