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Islip

$120+ Cheap flights from Austin to Islip, NY (AUS - ISP)

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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — ISP
ago. 19 — ago. 261
mar. 8/19
mar. 8/26
1 adult, Economy
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Cheap flight deals from Austin to Islip

Discover tips and strategies to find the most affordable flight options for your journey from Austin (AUS) to Islip (ISP). 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 agosto 14, 2025.

Round-trip from

$210
(FlightHub)

One-way from

$120
(FlightHub)

Popular in

October

Cheapest in

January

Average price

$527
From Austin Bergstrom to Islip Long Island
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One-way flight from Austin Bergstrom to Islip Long Island
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Highest demand for flights based on searches. 14% potential increase in price ($80 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Austin to Islip

Cheapest flights from Austin to Islip
Explore the most affordable flight options available from Austin to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on agosto 14, 2025.

This FlightHub deal was found by Cheapflights users on 8/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/66:15 pmAUS - ISP
1 stop25h 27mFrontier
dom. 10/129:47 pmISP - AUS
1 stop11h 09mFrontier
Deal found 8/13$210
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
lun. 10/66:15 pmAUS - ISP
1 stop25h 27mFrontier
sáb. 10/114:58 pmISP - AUS
1 stop18h 31mFrontier
Deal found 8/13$222
This Frontier deal was found by Cheapflights users on 8/13. 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.
jue. 10/95:51 pmAUS - ISP
2 stops14h 13mFrontier
dom. 10/129:47 pmISP - AUS
1 stop11h 09mFrontier
Deal found 8/13$225
This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/255:24 pmAUS - ISP
2 stops14h 40mFrontier
jue. 10/211:40 amISP - AUS
1 stop6h 45mFrontier
Deal found 8/14$229
This FlightHub deal was found by Cheapflights users on 8/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/55:24 pmAUS - ISP
2 stops43h 49mFrontier
dom. 10/129:47 pmISP - AUS
1 stop11h 09mFrontier
Deal found 8/13$232
This FlightHub deal was found by Cheapflights users on 8/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/226:15 pmAUS - ISP
1 stop15h 25mFrontier
mié. 10/111:35 amISP - AUS
2 stops29h 59mFrontier
Deal found 8/14$235
This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/59:23 pmAUS - ISP
2 stops12h 32mFrontier
sáb. 9/65:18 pmISP - AUS
2 stops15h 28mFrontier
Deal found 8/14$238
This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/2611:27 amAUS - ISP
2 stops22h 28mFrontier
sáb. 9/275:18 pmISP - AUS
2 stops15h 28mFrontier
Deal found 8/14$239
This Frontier deal was found by Cheapflights users on 8/13. 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.
vie. 10/39:23 pmAUS - ISP
2 stops12h 32mFrontier
mar. 10/1410:39 amISP - AUS
2 stops14h 54mFrontier
Deal found 8/13$245
This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/59:23 pmAUS - ISP
2 stops12h 32mFrontier
dom. 9/75:12 pmISP - AUS
2 stops17h 21mFrontier
Deal found 8/14$247
This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/225:29 pmAUS - ISP
2 stops16h 11mFrontier
sáb. 9/275:18 pmISP - AUS
2 stops15h 28mFrontier
Deal found 8/14$250

Cheapflights Fare Finder

 
Customize your flight search to find flights from Austin to Islip 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 agosto 14, 2025.
Use the filters below to find and compare flights from Austin to Islip that are best for you.

Fly from

Austin

Fly to

Islip

Route

Depart

Return

Price

AustinIslip

AUS - ISP

AUSISP

Austin Bergstrom

lun. 10/6

6:15 pm-8:42 pm

1 stop25h 27m

Islip Long Island

dom. 10/12

9:47 pm-7:56 am

1 stop11h 09m

$210

AustinIslip

AUS - ISP

AUSISP

Austin Bergstrom

lun. 10/6

6:15 pm-8:42 pm

1 stop25h 27m

Islip Long Island

sáb. 10/11

4:58 pm-10:29 am

1 stop18h 31m

$222

AustinIslip

AUS - ISP

AUSISP

Austin Bergstrom

jue. 10/9

5:51 pm-9:04 am

2 stops14h 13m

Islip Long Island

dom. 10/12

9:47 pm-7:56 am

1 stop11h 09m

$225

AustinIslip

AUS - ISP

AUSISP

Austin Bergstrom

jue. 9/25

5:24 pm-9:04 am

2 stops14h 40m

Islip Long Island

jue. 10/2

11:40 am-5:25 pm

1 stop6h 45m

$229

AustinIslip

AUS - ISP

AUSISP

Austin Bergstrom

dom. 10/5

5:24 pm-2:13 pm

2 stops43h 49m

Islip Long Island

dom. 10/12

9:47 pm-7:56 am

1 stop11h 09m

$232

AustinIslip

AUS - ISP

AUSISP

Austin Bergstrom

lun. 9/22

6:15 pm-10:40 am

1 stop15h 25m

Islip Long Island

mié. 10/1

11:35 am-4:34 pm

2 stops29h 59m

$235

AustinIslip

AUS - ISP

AUSISP

Austin Bergstrom

vie. 9/5

9:23 pm-10:55 am

2 stops12h 32m

Islip Long Island

sáb. 9/6

5:18 pm-7:46 am

2 stops15h 28m

$238

AustinIslip

AUS - ISP

AUSISP

Austin Bergstrom

vie. 9/26

11:27 am-10:55 am

2 stops22h 28m

Islip Long Island

sáb. 9/27

5:18 pm-7:46 am

2 stops15h 28m

$239

AustinIslip

AUS - ISP

AUSISP

Austin Bergstrom

vie. 10/3

9:23 pm-10:55 am

2 stops12h 32m

Islip Long Island

mar. 10/14

10:39 am-12:33 am

2 stops14h 54m

$245

AustinIslip

AUS - ISP

AUSISP

Austin Bergstrom

vie. 9/5

9:23 pm-10:55 am

2 stops12h 32m

Islip Long Island

dom. 9/7

5:12 pm-9:33 am

2 stops17h 21m

$247

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 20 results
1
2

Best time to book a flight from Austin to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Austin 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 Austin to Islip

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

Currently, January is the cheapest month in which you can book a flight from Austin to Islip, New York (average of $108). Flying from Austin to Islip, New York in November is currently the most expensive (average of $213). 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 Islip

Get insights into the airlines that provide service to Islip. 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 Islip. Reviews last updated agosto 14, 2025.
Get a feel of what it's like to fly with Southwest from Austin to Islip by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Related info for your journey

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

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

    Southwest, at $388, was found to be the cheapest airline from Austin to Islip, New York.. You may be able to fly from Austin to Islip, New York for 15% less than the average price by searching for this airline.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Austin to Islip 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 Austin to Islip, New York?

    Currently, January is the cheapest month in which you can book a flight from Austin to Islip, New York (average of $108). Flying from Austin to Islip, New York in November is currently the most expensive (average of $213). 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 Islip?

Book flights to Islip if you plan to visit one of these locations
Riverhead
Southampton

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Alternative routes for Austin to Islip

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Austin to Islip

Discover the top airline that operate flights from Austin to Islip. 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 agosto 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$388Average$531FlexibilityNo cancel feeOn-time63%

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