$110 Cheap Flights from Islip (ISP) to Austin (AUS)

View $110 flight on Sat, Sep 20, 2025Opens in a new window

Popular airlines from MacArthur Airport (ISP) to Austin-Bergstrom Intl. Airport (AUS)

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Cheap Flights from Islip to Austin (ISP-AUS)

Prices were available within the past 7 days and start at $110 for one-way flights and $219 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Wed, Oct 8 - Tue, Oct 14
ISP
Islip
AUS
Austin
$219 Roundtrip, found 1 day ago
$219
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Wed, Oct 8 from Islip to Austin, returning Tue, Oct 14, priced at $219 found 1 day ago
Southwest Airlines
Wed, Sep 24 - Sat, Sep 27
ISP
Islip
AUS
Austin
$224 Roundtrip, found 1 day ago
$224
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Wed, Sep 24 from Islip to Austin, returning Sat, Sep 27, priced at $224 found 1 day ago
Southwest Airlines
Thu, Sep 4 - Mon, Sep 8
ISP
Islip
AUS
Austin
$229 Roundtrip, found 2 days ago
$229
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Thu, Sep 4 from Islip to Austin, returning Mon, Sep 8, priced at $229 found 2 days ago
Southwest Airlines
Wed, Oct 8 - Tue, Oct 14
ISP
Islip
AUS
Austin
$229 Roundtrip, found 1 day ago
$229
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Wed, Oct 8 from Islip to Austin, returning Tue, Oct 14, priced at $229 found 1 day ago
Southwest Airlines
Thu, Sep 4 - Mon, Sep 8
ISP
Islip
AUS
Austin
$234 Roundtrip, found 2 days ago
$234
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Thu, Sep 4 from Islip to Austin, returning Mon, Sep 8, priced at $234 found 2 days ago
Southwest Airlines
Thu, Sep 4 - Mon, Sep 8
ISP
Islip
AUS
Austin
$239 Roundtrip, found 2 days ago
$239
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Thu, Sep 4 from Islip to Austin, returning Mon, Sep 8, priced at $239 found 2 days ago
Southwest Airlines
Thu, Sep 4 - Mon, Sep 8
ISP
Islip
AUS
Austin
$244 Roundtrip, found 2 days ago
$244
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Thu, Sep 4 from Islip to Austin, returning Mon, Sep 8, priced at $244 found 2 days ago
Southwest Airlines
Wed, Oct 8 - Tue, Oct 14
ISP
Islip
AUS
Austin
$259 Roundtrip, found 1 day ago
$259
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Wed, Oct 8 from Islip to Austin, returning Tue, Oct 14, priced at $259 found 1 day ago
Frontier Airlines
Thu, Sep 4 - Mon, Sep 8
ISP
Islip
AUS
Austin
$284 Roundtrip, found 2 days ago
$284
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Thu, Sep 4 from Islip to Austin, returning Mon, Sep 8, priced at $284 found 2 days ago
JetBlue Airways
Tue, Sep 2 - Tue, Sep 16
ISP
Islip
AUS
Austin
$505 Roundtrip, found 1 day ago
$505
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Tue, Sep 2 from Islip to Austin, returning Tue, Sep 16, priced at $505 found 1 day ago

Alternative airports near Austin

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

Select flight to Austin-Bergstrom Intl. AUS. Cheapest and Closest option available. Average driving time to city center is 11 minutes. Flights from $747
AUS
Austin-Bergstrom Intl.
CheapestClosest
Average driving time to city center11 min
Flights from $747
Flights from Islip (ISP) to Austin (AUS)
Origin airport
MacArthur
Destination airport
Austin-Bergstrom Intl.
Airlines serving
Frontier Airlines, JetBlue Airways, Southwest Airlines
Roundtrip price
$218
Distance
1556 mi

Islip to Austin Flights

The cheapest times to fly from Islip to Austin

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 Islip to Austin are during the month of October. You can find some of the cheapest flights from Islip to Austin with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Islip to Austin

Sunday is one of the best days to book for cheap flights from Islip to Austin: 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 Islip to Austin

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 Islip to Austin in 2025. You can also book with separate airlines for your outbound and return journeys, from $110 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 Islip to Austin 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 Islip to Austin 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 MacArthur Airport (ISP) to Austin-Bergstrom Intl. Airport (AUS) cost?
Discover the latest flight deals from ISP to AUS 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 ISP to AUS?
The cheapest flights from ISP to AUS are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from MacArthur Airport (ISP) to Austin-Bergstrom Intl. Airport (AUS)?
You can't catch a direct flight from Islip, NY (ISP-MacArthur) to Austin-Bergstrom Intl. Airport (AUS). However, you can easily reach Austin without any layovers by departing from John F. Kennedy Intl. Airport (JFK).
What is the cheapest airline that flies from ISP to AUS?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from ISP to AUS. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from MacArthur Airport (ISP) to Austin-Bergstrom Intl. Airport (AUS)?
You'll need to take a flight with a layover when traveling from MacArthur Airport (ISP) to Austin-Bergstrom Intl. Airport (AUS). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to discover an option that works for you.
What day of the week has the most flights from ISP to AUS?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from MacArthur Airport (ISP) to Austin-Bergstrom Intl. Airport (AUS)?
To avoid possible delays on the MacArthur Airport (ISP) to Austin-Bergstrom Intl. Airport (AUS) route, fly before 3 PM. Departures after this time have a 22% higher chance of being canceled.**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.
Is it cheaper to buy a plane ticket from MacArthur Airport (ISP) to Austin-Bergstrom Intl. Airport (AUS) last-minute?
Booking your flight from ISP to AUS right before your getaway is generally more expensive. But if there's some wiggle room with your travel dates and times, you could grab a cheap last-minute fare.
Is it cheaper to book an ISP to AUS flight and hotel package?
Securing an ISP to AUS flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Pick from our wide range of hotels and then add activities, flights and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from MacArthur Airport (ISP) to Austin-Bergstrom Intl. Airport (AUS)?
If you reserved your ISP to AUS flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of ticket 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, go to our Customer Service portal if you'd like more information.

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*Available to One Key members.