$106 Cheap Frontier Airlines flights Cincinnati (CVG) to Islip (ISP)

Landing cheap one-way Frontier Airlines flights from CVG to ISP from $106 on Expedia couldn’t be simpler — just filter by “Price (lowest to highest).” Alternatively, check out our affordable round-trip fares from $210 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 Islip tend to be more affordable in the off-peak months of January and February. Whether you’re searching for a return or one-way ticket, you could find a better deal then.

For cheap Frontier Airlines fares from Cincinnati - Northern Kentucky Intl. Airport (CVG) to MacArthur Airport (ISP), start searching one to three months before your planned departure. Reserving 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 influence what you pay. Sunday is usually 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.

Fill in your dates, hit search and select the “Nonstop” filter on Expedia to find any direct flights from CVG to ISP with Frontier Airlines or other carriers.

Sort your results by “Early Morning” and “Morning” to browse the earliest departures from CVG to ISP. Jetting 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.

Board a Frontier Airlines flight from Cincinnati - Northern Kentucky Intl. Airport (CVG) to Islip, and you’ll probably land at MacArthur Airport (ISP). This is the airline’s primary hub here.

A rewarding loyalty program and the opportunity to collect points through Frontier Miles are the start of the reasons to depart from CVG to ISP with Frontier Airlines. Plus, when you join our One Key™ program, you can receive OneKeyCash™* in addition to any airline loyalty program earnings. You can put it toward your future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on your fare type, a fee typically applies if you cancel or change your booking more than 24 hours after confirmation. To find flexible fares, select our “Changes included” and “No cancel fee” boxes when you search for flights. For more information on modifying or canceling your reservation, go to “Trips,” select your flight and click on “Manage Booking.”