$85 Cheap Frontier Airlines flights Charlotte (CLT) to Islip (ISP)

You’ll find affordable round-trip Frontier Airlines flights from $170 from CLT to ISP by organizing your results from “Price (lowest to highest)” on Expedia. Or search for options from $85 for a one-way trip.**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.

Browse for round-trip or one-way flights to Islip in January or February. You could find a cheap fare with Frontier Airlines during these off-season months.

Start searching one to three months before your departure to get cheap fares on Frontier Airlines flights from Charlotte-Douglas Intl. Airport (CLT) to MacArthur Airport (ISP). 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 reduce 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 spot on, 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.

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

To find the earliest departure from CLT to ISP with Frontier Airlines, sort your results by “Morning” and “Early Morning.” Booking 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.

Frontier Airlines flights from Charlotte-Douglas Intl. Airport (CLT) to Islip arrive at MacArthur Airport (ISP). This is the main gateway to this destination.

A rewarding loyalty program and the chance to rack up points through Frontier Miles are the start of the reasons to leave from CLT to ISP with Frontier Airlines. Plus, when you sign up to Expedia’s free One Key™ program, you can receive OneKeyCash™* alongside Frontier Airlines’s 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.

It’s usually possible to cancel or reschedule your flight, although there may be a charge if you made your booking more than 24 hours ago. Need flexible options? Make use of Expedia’s “No cancel fee” or “Changes included” filter to find flights that won’t penalize you if you have to adjust your plans. To modify your itinerary, visit “Trips,” select your flight and click on “Manage Booking” for more details.