$105 Cheap Flights from Atlanta (ATL) to Islip (ISP)

View $105 flight on Fri, May 16, 2025Opens in a new window
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Cheap Flights from Atlanta to Islip (ATL-ISP)

Prices were available within the past 7 days and start at $105 for one-way flights and $210 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, May 15 - Mon, May 19
ATL
Atlanta
ISP
Islip
$210 Roundtrip, found 4 hours ago
$210
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Thu, May 15 from Atlanta to Islip, returning Mon, May 19, priced at $210 found 4 hours ago
Frontier Airlines
Sun, May 11 - Thu, May 15
ATL
Atlanta
ISP
Islip
$220 Roundtrip, found 3 hours ago
$220
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Sun, May 11 from Atlanta to Islip, returning Thu, May 15, priced at $220 found 3 hours ago
Frontier Airlines
Sun, May 4 - Thu, May 15
ATL
Atlanta
ISP
Islip
$230 Roundtrip, found 10 hours ago
$230
Roundtrip
found 10 hours ago
Select Frontier Airlines flight, departing Sun, May 4 from Atlanta to Islip, returning Thu, May 15, priced at $230 found 10 hours ago
Frontier Airlines
Tue, May 20 - Sat, May 24
ATL
Atlanta
ISP
Islip
$231 Roundtrip, found 8 hours ago
$231
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Tue, May 20 from Atlanta to Islip, returning Sat, May 24, priced at $231 found 8 hours ago
Frontier Airlines
Sun, May 4 - Thu, May 8
ATL
Atlanta
ISP
Islip
$240 Roundtrip, found 10 hours ago
$240
Roundtrip
found 10 hours ago
Select Frontier Airlines flight, departing Sun, May 4 from Atlanta to Islip, returning Thu, May 8, priced at $240 found 10 hours ago
Frontier Airlines
Tue, May 13 - Sat, May 24
ATL
Atlanta
ISP
Islip
$241 Roundtrip, found 1 day ago
$241
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, May 13 from Atlanta to Islip, returning Sat, May 24, priced at $241 found 1 day ago
Frontier Airlines
Thu, May 15 - Mon, May 19
ATL
Atlanta
ISP
Islip
$248 Roundtrip, found 4 hours ago
$248
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Thu, May 15 from Atlanta to Islip, returning Mon, May 19, priced at $248 found 4 hours ago
Frontier Airlines
Thu, May 1 - Sun, May 4
ATL
Atlanta
ISP
Islip
$250 Roundtrip, found 4 hours ago
$250
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Thu, May 1 from Atlanta to Islip, returning Sun, May 4, priced at $250 found 4 hours ago
Southwest Airlines
Tue, May 13 - Thu, May 15
ATL
Atlanta
ISP
Islip
$262 Roundtrip, found 4 days ago
$262
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Tue, May 13 from Atlanta to Islip, returning Thu, May 15, priced at $262 found 4 days ago
JetBlue Airways
Thu, Sep 4 - Sun, Sep 7
ATL
Atlanta
ISP
Islip
$293 Roundtrip, found 8 hours ago
$293
Roundtrip
found 8 hours ago
Select JetBlue Airways flight, departing Thu, Sep 4 from Atlanta to Islip, returning Sun, Sep 7, priced at $293 found 8 hours ago
Flights from Atlanta (ATL) to Islip (ISP)
Origin airport
Hartsfield-Jackson Atlanta Intl.
Destination airport
MacArthur
Airlines serving
Frontier Airlines, JetBlue Airways, Southwest Airlines
Roundtrip price
$204
Distance
794 mi

Atlanta to Islip Flights

The cheapest times to fly from Atlanta to Islip

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Atlanta to Islip are during the month of May. You can find some of the cheapest flights from Atlanta to Islip with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Atlanta to Islip

Sunday is one of the best days to book for cheap flights from Atlanta to Islip: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Atlanta to Islip

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Atlanta to Islip in 2025. You can also book with separate airlines for your outbound and return journeys, from $105 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Atlanta to Islip flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Atlanta to Islip airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How much does a flight from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to MacArthur Airport (ISP) cost?
Discover the latest flight deals from ATL to ISP by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from ATL to ISP?
The cheapest flights from ATL to ISP are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from ATL to ISP?
With prices starting from $74 for a one-way flight from ATL to ISP, Frontier Airlines is currently the cheapest airline flying this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from ATL on June 13 2025. Prices were last updated on April 23 2025 and have not changed since.
How many flights per day from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to MacArthur Airport (ISP)?
Direct flights from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to MacArthur Airport (ISP) aren’t available daily, so you’ll have to take a flight with a layover. Explore your options with Expedia’s filters. Enter your dates and select either “1 Stop” or “2+ Stops.”
What day of the week has the most flights from ATL to ISP?
Generally you’ll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* However, this can change depending on the airline, season and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to MacArthur Airport (ISP)?
To reach MacArthur Airport (ISP) without delays, opt for a flight that leaves Hartsfield-Jackson Atlanta Intl. Airport (ATL) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for Islip from Hartsfield-Jackson Atlanta Intl. Airport (ATL)?
You can land at one of these Islip airports following your direct flight from Hartsfield-Jackson Atlanta Intl. Airport (ATL):

  • LaGuardia Airport (LGA)
  • John F. Kennedy Intl. Airport (JFK)
  • Westchester County Airport (HPN)

Is it cheaper to buy a plane ticket from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to MacArthur Airport (ISP) last-minute?
Holding off until just before your departure to book your flight from ATL to ISP often results in higher prices. While you might find some last-minute offers, there’s no guarantee. Be flexible with your itinerary to maximize your chances of scoring a bargain.
Is it cheaper to book an ATL to ISP flight and hotel package?
Compared with arranging hotels and flights separately, booking an ATL to ISP flight and hotel package with Expedia could lead to significant savings. Better yet, having it all in one place takes the hassle out of travel planning. Just pick your flights and select from our wide range of stays, then customize your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to MacArthur Airport (ISP)?
If you reserved your ATL to ISP flight in the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of fare you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you want more information.

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*Available to One Key members.