$105 Cheap Frontier Airlines flights Cleveland (CLE) to Islip (ISP)

Use the “Price (lowest to highest)” filter on Expedia to find cheap Frontier Airlines return flights from $204 from CLE to ISP. Affordable one-way fares from $105 are also available.**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.

Look for one-way or return flights to Islip in January or February. You could find cheaper fares with Frontier Airlines during these off-peak travel months.

Begin your search one to three months before your departure to get cheap fares on Frontier Airlines flights from Hopkins Intl. Airport (CLE) to MacArthur Airport (ISP). You can save 25% by booking your domestic flight 34 to 86 days in advance versus 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 flights.*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.

Use our “Nonstop” filter when searching for direct Frontier Airlines flights from CLE to ISP. It’s also an easy way to compare other airlines servicing the same direct trip.

To find the earliest departures from CLE to ISP with Frontier Airlines, filter your search by “Morning” and “Early Morning.” Choosing an early flight generally 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.

MacArthur Airport (ISP) is the main Islip hub for Frontier Airlines flights from Hopkins Intl. Airport (CLE).

A rewarding loyalty program and the chance to rack up points through Frontier Miles are the start of the reasons to jet off from CLE to ISP with Frontier Airlines. Plus, when you join our One Key™ program, you can receive OneKeyCash™* in addition to Frontier Airlines’s loyalty program earnings. It’s yours to spend on your next adventure.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on the ticket type you purchased, a fee typically applies if you cancel or change your flight more than 24 hours after confirmation. To secure plane tickets with more flexibility, select our “Changes included” and “No cancel fee” boxes while searching for flights. To learn more about modifying or canceling your reservation, go to “Trips,” select your flight and click on “Manage Booking.”