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$168+ Cheap flights from Islip, NY to Austin (ISP - AUS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/29. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — AUS
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap flight deals from Islip to Austin

Cheapest flights from Islip to Austin
Explore the most affordable flight options available from Islip to Austin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

This Frontier deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/298:35 pmISP - AUS
1 stop12h 33mFrontier
Sun 1/49:03 amAUS - ISP
1 stop9h 36mFrontier
Deal found 12/13$483
This Kiwi.com deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/298:35 pmISP - AUS
1 stop12h 33mMultiple Airlines
Fri 1/25:30 amAUS - ISP
2 stops41h 29mMultiple Airlines
Deal found 12/14$599
This Kiwi.com deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:27 pmISP - AUS
1 stop15h 41mMultiple Airlines
Fri 12/266:00 amAUS - ISP
1 stop12h 40mMultiple Airlines
Deal found 12/13$677
This Frontier deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/228:35 pmISP - AUS
1 stop12h 33mFrontier
Sun 12/289:03 amAUS - ISP
1 stop9h 37mFrontier
Deal found 12/15$681
This Southwest deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2412:55 pmISP - AUS
2 stops7h 25mSouthwest
Fri 12/262:20 pmAUS - ISP
2 stops8h 35mSouthwest
Deal found 12/13$907

Find flight deals from Islip to Austin

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Austin (AUS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$217
(Frontier)

One-way from

$168
(Expedia)

Popular in

May

Cheapest in

September

Average price

$385
Provider with most accurate pricing for Islip Long Island-Austin Bergstrom flight deals.
Search Deals
Provider most trusted by Cheapflights users for Islip Long Island-Austin Bergstrom flights.
Search Deals
From Islip Long Island to Austin Bergstrom
Search Deals
One-way flight from Islip Long Island to Austin Bergstrom
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($181 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 12% potential price decrease ($57 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Austin that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 15, 2025.
Use the filters below to find and compare flights from Islip to Austin that are best for you.

Fly from

Islip

Fly to

Austin

Route

Depart

Return

Price

IslipAustin

ISP - AUS

ISPAUS

Islip Long Island

Sun 1/18

9:52 am-6:34 pm

1 stop9h 42m

Austin Bergstrom

Thu 1/22

11:16 am-6:48 pm

1 stop6h 32m

$217

IslipAustin

ISP - AUS

ISPAUS

Islip Long Island

Thu 2/5

7:43 pm-10:34 am

2 stops15h 51m

Austin Bergstrom

Sun 2/8

7:26 pm-6:48 pm

1 stop22h 22m

$417

IslipAustin

ISP - AUS

ISPAUS

Islip Long Island

Thu 2/5

4:05 pm-9:35 pm

1 stop6h 30m

Austin Bergstrom

Sun 2/8

5:45 am-11:55 am

1 stop5h 10m

$420

IslipAustin

ISP - AUS

ISPAUS

Islip Long Island

Wed 2/18

6:00 am-11:30 am

1 stop6h 30m

Austin Bergstrom

Sat 2/21

6:45 am-2:20 pm

1 stop6h 35m

$456

IslipAustin

ISP - AUS

ISPAUS

Islip Long Island

Mon 12/29

8:35 pm-8:08 am

1 stop12h 33m

Austin Bergstrom

Fri 1/2

6:00 am-7:40 pm

1 stop12h 40m

$654

IslipAustin

ISP - AUS

ISPAUS

Islip Long Island

Wed 12/24

5:27 pm-8:08 am

1 stop15h 41m

Austin Bergstrom

Fri 12/26

6:00 am-7:40 pm

1 stop12h 40m

$677

IslipAustin

ISP - AUS

ISPAUS

Islip Long Island

Mon 12/22

8:35 pm-8:08 am

1 stop12h 33m

Austin Bergstrom

Sun 12/28

9:03 am-7:40 pm

1 stop9h 37m

$681

IslipAustin

ISP - AUS

ISPAUS

Islip Long Island

Mon 12/29

8:35 pm-8:08 am

1 stop12h 33m

$168

IslipAustin

ISP - AUS

ISPAUS

Islip Long Island

Sat 1/10

12:25 pm-10:17 pm

1 stop10h 52m

$232

IslipAustin

ISP - AUS

ISPAUS

Islip Long Island

Mon 12/22

6:25 am-12:58 am

2 stops19h 33m

$237

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/13

Showing 1-10 of 11 results
1
2

Compare providers for flights from Islip to Austin

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to Austin in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Islip, New York-Austin flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Islip, New York-Austin flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Islip, New York-Austin flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Islip, New York-Austin flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip, New York-Austin flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Islip to Austin

Have a flexible travel schedule? Discover the best time to fly to Austin from Islip with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Islip to Austin

What is the cheapest month to book a flight from Islip, New York to Austin?

Currently, December is the cheapest month in which you can book a flight from Islip, New York to Austin (average of $86). Flying from Islip, New York to Austin in September is currently the most expensive (average of $163). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Austin

Get insights into the airlines that provide service to Austin. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Austin. Reviews last updated December 15, 2025.
See what other customers who have flown with Southwest from Islip to Austin have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,250 reviews

Overall

7.9

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
7.9
Good
4,250 reviews
Southwest
7.9
Good
4,250 reviews

Overall

7.9

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from Islip to Austin. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Islip, New York to Austin?

    A quick flight from Islip, New York to Austin can take about 6h 30m. Frontier provides one of the quickest options available for as low as $420. The distance between Islip, New York and Austin is about 1556 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What is the cheapest airline to fly from Islip, New York to Austin round-trip?

    Our cheapest airline available from Islip, New York to Austin is Southwest. Our recent data shows that you can find tickets from as low as $320 on this airline. You may be able to fly from Islip, New York to Austin for 37% less than the average price by searching for this airline.

  • Can I find deals for flights from Islip to Austin that include hotel bookings?

    Yes. In addition to deals on Islip to Austin flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to Austin?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Austin.

  • Can I find deals for business class flights from Islip to Austin?

    Yes. Cheapflights offers flight deals from Islip to Austin by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Islip, New York to Austin?

    Currently, December is the cheapest month in which you can book a flight from Islip, New York to Austin (average of $86). Flying from Islip, New York to Austin in September is currently the most expensive (average of $163). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Austin?

Book flights to Austin if you plan to visit one of these locations
Cedar Park
Round Rock
San Marcos
Georgetown
Fredericksburg
Pflugerville
Dripping Springs
Canyon Lake
Seguin
Horseshoe Bay

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Top airline flying from Islip to Austin

Discover the top airline that operate flights from Islip to Austin. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$320Average$472FlexibilityNo cancel feeOn-time63%

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