$77 Cheap Flights from Atlanta (ATL) to Islip (ISP)

View $77 flight on Tue, Oct 21, 2025Opens in a new window

Popular airlines from Hartsfield-Jackson Atlanta International Airport (ATL) to MacArthur Airport (ISP)

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • one key icon

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Atlanta to Islip (ATL-ISP)

Prices were available within the past 7 days and start at $77 for one-way flights and $154 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Tue, Oct 14 - Tue, Oct 21
ATL
Atlanta
ISP
Islip
$154 Roundtrip, found 4 hours ago
$154
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Tue, Oct 14 from Atlanta to Islip, returning Tue, Oct 21, priced at $154 found 4 hours ago
Frontier Airlines
Fri, Oct 17 - Tue, Oct 21
ATL
Atlanta
ISP
Islip
$158 Roundtrip, found 4 hours ago
$158
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Fri, Oct 17 from Atlanta to Islip, returning Tue, Oct 21, priced at $158 found 4 hours ago
Frontier Airlines
Sun, Nov 2 - Mon, Nov 3
ATL
Atlanta
ISP
Islip
$162 Roundtrip, found 1 day ago
$162
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sun, Nov 2 from Atlanta to Islip, returning Mon, Nov 3, priced at $162 found 1 day ago
Frontier Airlines
Tue, Oct 14 - Fri, Oct 17
ATL
Atlanta
ISP
Islip
$175 Roundtrip, found 1 hour ago
$175
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Tue, Oct 14 from Atlanta to Islip, returning Fri, Oct 17, priced at $175 found 1 hour ago
Frontier Airlines
Thu, Oct 16 - Sun, Oct 19
ATL
Atlanta
ISP
Islip
$179 Roundtrip, found 7 hours ago
$179
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Thu, Oct 16 from Atlanta to Islip, returning Sun, Oct 19, priced at $179 found 7 hours ago
Frontier Airlines
Fri, Oct 17 - Fri, Oct 24
ATL
Atlanta
ISP
Islip
$186 Roundtrip, found 4 hours ago
$186
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Fri, Oct 17 from Atlanta to Islip, returning Fri, Oct 24, priced at $186 found 4 hours ago
Frontier Airlines
Thu, Oct 9 - Fri, Oct 17
ATL
Atlanta
ISP
Islip
$190 Roundtrip, found 9 hours ago
$190
Roundtrip
found 9 hours ago
Select Frontier Airlines flight, departing Thu, Oct 9 from Atlanta to Islip, returning Fri, Oct 17, priced at $190 found 9 hours ago
Frontier Airlines
Thu, Oct 16 - Sun, Oct 19
ATL
Atlanta
ISP
Islip
$196 Roundtrip, found 7 hours ago
$196
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Thu, Oct 16 from Atlanta to Islip, returning Sun, Oct 19, priced at $196 found 7 hours ago
JetBlue Airways
Thu, Nov 6 - Mon, Nov 10
ATL
Atlanta
ISP
Islip
$202 Roundtrip, found 3 days ago
$202
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Thu, Nov 6 from Atlanta to Islip, returning Mon, Nov 10, priced at $202 found 3 days ago
Southwest Airlines
Wed, Oct 29 - Mon, Nov 3
ATL
Atlanta
ISP
Islip
$209 Roundtrip, found 4 days ago
$209
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Wed, Oct 29 from Atlanta to Islip, returning Mon, Nov 3, priced at $209 found 4 days ago

Find the cheapest month to fly from Atlanta (ATL) to Islip (ISP)

January is typically the cheapest month to fly

From $118 - $567 per traveler.

Alternative airports near Islip

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to MacArthur ISP. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $154
ISP
MacArthur
CheapestClosest
Average driving time to city center14 min
Flights from $154
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
$154
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 October. 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 $77 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?
Get a cheap one-way flight from $77 or cheap return flight from $154 from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to MacArthur Airport (ISP) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to MacArthur Airport (ISP)?
Flying in October may help you find better deals, as it's the cheapest month for flights between ATL and ISP. You'll typically find the lowest prices during the off-season.
What is the cheapest airline that flies from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to MacArthur Airport (ISP)?
To find the cheapest airline flying from ATL to ISP, use Expedia's filter tool. Customize your search based on what matters most to you, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
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.

Explore a world of travel with Expedia

*Available to One Key members.