$105 Cheap Frontier Airlines flights Islip (ISP) to Atlanta (ATL)

Scoring cheap one-way Frontier Airlines flights from ISP to ATL from $105 on Expedia is a cinch — just filter by “Price (lowest to highest).” Or check out our affordable return fares from $210 for your next exciting 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.

Look for return or one-way flights to Atlanta in January or February. You could find a cheap fare with Frontier Airlines during these off-peak travel months.

Search for affordable Frontier Airlines flights from MacArthur Airport (ISP) to Hartsfield-Jackson Atlanta Intl. Airport (ATL) one to three months prior to your departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare class and journey, the best day of the week to book a domestic flight is usually Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**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 browsing for direct Frontier Airlines flights from ISP to ATL. It’s also an easy way to compare other carriers servicing the same direct route.

Find Frontier Airlines’s earliest flights from ISP to ATL by selecting the “Early Morning” and “Morning” filters. Not only will you arrive at your destination sooner, early departures also experience 20% fewer 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 MacArthur Airport (ISP) to Atlanta, and you’ll likely touch down at Hartsfield-Jackson Atlanta Intl. Airport (ATL). This is the airline’s primary hub in this destination.

A rewarding loyalty program and the opportunity to collect points through Frontier Miles are the start of the reasons to travel from ISP to ATL with Frontier Airlines. Plus, by joining Expedia’s free One Key™ program, you can earn 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.

Changes are typically free within 24 hours of making a booking, but your airline may charge a fee after that time. For more details about modifying your reservation, go to your “Trips,” select your flight and click on “Manage Booking.” If you want the flexibility to change your itinerary without being charged, tick the “Changes included” or “No cancel fee” filter when planning your next trip.