$89 Cheap Flights from Islip (ISP) to Austin (AUS)

View $89 flight on Thu, Sep 11, 2025Opens in a new window

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

Cheap Flights from Islip to Austin (ISP-AUS)

Prices were available within the past 7 days and start at $89 for one-way flights and $178 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Sep 18 - Thu, Oct 30
ISP
Islip
AUS
Austin
$178 Roundtrip, found 2 hours ago
$178
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Thu, Sep 18 from Islip to Austin, returning Thu, Oct 30, priced at $178 found 2 hours ago
Frontier Airlines
Thu, Oct 30 - Thu, Nov 6
ISP
Islip
AUS
Austin
$193 Roundtrip, found 18 hours ago
$193
Roundtrip
found 18 hours ago
Select Frontier Airlines flight, departing Thu, Oct 30 from Islip to Austin, returning Thu, Nov 6, priced at $193 found 18 hours ago
Frontier Airlines
Thu, Sep 18 - Fri, Oct 24
ISP
Islip
AUS
Austin
$217 Roundtrip, found 2 hours ago
$217
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Thu, Sep 18 from Islip to Austin, returning Fri, Oct 24, priced at $217 found 2 hours ago
Frontier Airlines
Thu, Sep 18 - Sun, Oct 26
ISP
Islip
AUS
Austin
$232 Roundtrip, found 2 hours ago
$232
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Thu, Sep 18 from Islip to Austin, returning Sun, Oct 26, priced at $232 found 2 hours ago
Frontier Airlines
Thu, Sep 18 - Sun, Sep 21
ISP
Islip
AUS
Austin
$237 Roundtrip, found 4 days ago
$237
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Thu, Sep 18 from Islip to Austin, returning Sun, Sep 21, priced at $237 found 4 days ago
Frontier Airlines
Thu, Sep 11 - Thu, Sep 18
ISP
Islip
AUS
Austin
$248 Roundtrip, found 2 days ago
$248
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Thu, Sep 11 from Islip to Austin, returning Thu, Sep 18, priced at $248 found 2 days ago
Frontier Airlines
Wed, Oct 22 - Fri, Oct 24
ISP
Islip
AUS
Austin
$256 Roundtrip, just found
$256
Roundtrip
just found
Select Frontier Airlines flight, departing Wed, Oct 22 from Islip to Austin, returning Fri, Oct 24, priced at $256 just found
Frontier Airlines
Wed, Oct 29 - Fri, Oct 31
ISP
Islip
AUS
Austin
$258 Roundtrip, found 5 days ago
$258
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Wed, Oct 29 from Islip to Austin, returning Fri, Oct 31, priced at $258 found 5 days ago
Southwest Airlines
Wed, Oct 15 - Wed, Oct 22
ISP
Islip
AUS
Austin
$313 Roundtrip, found 10 hours ago
$313
Roundtrip
found 10 hours ago
Select Southwest Airlines flight, departing Wed, Oct 15 from Islip to Austin, returning Wed, Oct 22, priced at $313 found 10 hours ago
JetBlue Airways
Sat, Dec 6 - Tue, Dec 9
ISP
Islip
AUS
Austin
$379 Roundtrip, found 1 day ago
$379
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Sat, Dec 6 from Islip to Austin, returning Tue, Dec 9, priced at $379 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 $178
AUS
Austin-Bergstrom Intl.
CheapestClosest
Average driving time to city center11 min
Flights from $178
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
$178
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 September. 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 $89 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?
Grab a cheap one-way flight from $89 or cheap return flight from $178 from MacArthur Airport (ISP) to Austin-Bergstrom Intl. Airport (AUS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from MacArthur Airport (ISP) to Austin-Bergstrom Intl. Airport (AUS)?
Traveling in September may help you find better deals, as it's the cheapest month for flights between ISP and AUS. You'll usually find the lowest fares during the off-season.
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 MacArthur Airport (ISP) to Austin-Bergstrom Intl. Airport (AUS)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest ISP to AUS flight.
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.

Explore a world of travel with Expedia

*Available to One Key members.