HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Austin

$147+ 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 2/21. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — AUS
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Islip to Austin with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 January 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/28. 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.
Thu 2/263:34 pm
ISP
-
AUS
1 stop28h 10m
Multiple Airlines
Thu 3/57:15 am
AUS
-
ISP
2 stops28h 32m
Multiple Airlines
Deal found 1/28$236
This Kiwi.com deal was found by Cheapflights users on 1/29. 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.
Thu 2/193:34 pm
ISP
-
AUS
1 stop25h 30m
Multiple Airlines
Mon 2/237:41 pm
AUS
-
ISP
2 stops38h 29m
Multiple Airlines
Deal found 1/29$265
This Kiwi.com deal was found by Cheapflights users on 1/28. 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.
Sat 3/1411:50 am
ISP
-
AUS
2 stops13h 22m
Multiple Airlines
Wed 3/186:18 pm
AUS
-
ISP
1 stop20h 31m
Multiple Airlines
Deal found 1/28$306
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 2/27:43 pm
ISP
-
AUS
1 stop21h 21m
Multiple Airlines
Thu 2/55:58 pm
AUS
-
ISP
2 stops23h 40m
Multiple Airlines
Deal found 1/28$345
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 2/92:31 pm
ISP
-
AUS
2 stops33h 53m
Multiple Airlines
Thu 2/124:59 pm
AUS
-
ISP
1 stop13h 39m
Multiple Airlines
Deal found 1/28$348
This Frontier deal was found by Cheapflights users on 1/28. 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.
Sun 2/19:25 am
ISP
-
AUS
1 stop10h 06m
Frontier
Thu 2/511:16 am
AUS
-
ISP
1 stop6h 32m
Frontier
Deal found 1/28$366
This Southwest deal was found by Cheapflights users on 1/28. 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.
Thu 5/76:50 am
ISP
-
AUS
1 stop8h 40m
Southwest
Tue 5/1212:25 pm
AUS
-
ISP
1 stop5h 05m
Southwest
Deal found 1/28$367
This Southwest deal was found by Cheapflights users on 1/27. 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.
Thu 4/3012:30 pm
ISP
-
AUS
1 stop6h 15m
Southwest
Tue 5/55:50 am
AUS
-
ISP
1 stop7h 00m
Southwest
Deal found 1/27$380

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$236
(Kiwi.com)

One-way from

$147
(JetBlue)

Popular in

May

Cheapest in

January

Average price

$96
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. 30% potential increase in price ($215 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 12% potential price decrease ($55 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 29, 2026.
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

Thu 2/26

3:34 pm-6:44 pm

1 stop28h 10m

Austin Bergstrom

Thu 3/5

7:15 am-12:47 pm

2 stops28h 32m

$236

IslipAustin

ISP - AUS

ISPAUS

Islip Long Island

Thu 2/19

3:34 pm-4:04 pm

1 stop25h 30m

Austin Bergstrom

Mon 2/23

7:41 pm-11:10 am

2 stops38h 29m

$265

IslipAustin

ISP - AUS

ISPAUS

Islip Long Island

Sat 3/14

11:50 am-12:12 am

2 stops13h 22m

Austin Bergstrom

Wed 3/18

6:18 pm-3:49 pm

1 stop20h 31m

$306

IslipAustin

ISP - AUS

ISPAUS

Islip Long Island

Mon 2/9

2:31 pm-11:24 pm

2 stops33h 53m

Austin Bergstrom

Thu 2/12

4:59 pm-7:38 am

1 stop13h 39m

$348

IslipAustin

ISP - AUS

ISPAUS

Islip Long Island

Thu 5/7

6:50 am-2:30 pm

1 stop8h 40m

Austin Bergstrom

Tue 5/12

12:25 pm-6:30 pm

1 stop5h 05m

$367

IslipAustin

ISP - AUS

ISPAUS

Islip Long Island

Thu 4/30

12:30 pm-5:45 pm

1 stop6h 15m

Austin Bergstrom

Tue 5/5

5:50 am-1:50 pm

1 stop7h 00m

$380

IslipAustin

ISP - AUS

ISPAUS

Islip Long Island

Wed 4/1

5:45 am-11:06 am

2 stops30h 21m

Austin Bergstrom

Mon 4/6

8:27 pm-10:28 pm

1 stop25h 01m

$387

IslipAustin

ISP - AUS

ISPAUS

Islip Long Island

Thu 2/26

5:35 am-2:20 pm

2 stops9h 45m

Austin Bergstrom

Thu 3/5

6:45 am-5:20 pm

2 stops9h 35m

$403

IslipAustin

ISP - AUS

ISPAUS

Islip Long Island

Fri 2/20

8:33 am-8:44 pm

1 stop13h 11m

$165

IslipAustin

ISP - AUS

ISPAUS

Islip Long Island

Fri 3/27

1:42 pm-5:19 pm

1 stop28h 37m

$174

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 16 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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-Austin flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 $56). 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.

How much does it cost to fly round-trip from Islip, New York to Austin?

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 January 29, 2026.
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
8.0
Very good
4,267 reviews

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Overall

8.0

Food

7.0

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
8.0
Very good
4,267 reviews
Southwest
8.0
Very good
4,267 reviews

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Overall

8.0

Food

7.0

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 8h 40m. Southwest provides one of the quickest options available for as low as $367. The distance between Islip, New York and Austin is about 1556 mi.

  • 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 33% 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 $56). 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
Fredericksburg
Round Rock
San Marcos
Georgetown
Pflugerville
Dripping Springs
Canyon Lake
Seguin
Horseshoe Bay

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Islip to Austin

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Dallas/Fort Worth flights
Newark to Dallas/Fort Worth flights
LaGuardia to Dallas/Fort Worth flights
Newark to Hobby flights
John F Kennedy Intl to Hobby flights
John F Kennedy Intl to Austin flights
LaGuardia to Hobby flights
Newark to George Bush Intcntl flights
John F Kennedy Intl to George Bush Intcntl flights
Newark to Austin flights
LaGuardia to Austin flights
LaGuardia to George Bush Intcntl flights
Newark to San Antonio flights
John F Kennedy Intl to San Antonio flights
LaGuardia to Love Field flights
LaGuardia to San Antonio flights
Newark to Love Field flights
John F Kennedy Intl to Love Field flights
Buffalo to Dallas/Fort Worth flights
Syracuse to Dallas/Fort Worth flights
Buffalo to Hobby flights
Rochester to Hobby flights
Rochester to Dallas/Fort Worth flights
Albany to Dallas/Fort Worth flights
John F Kennedy Intl to El Paso flights
Buffalo to George Bush Intcntl flights
Albany to Hobby flights
Rochester to George Bush Intcntl flights
Newark to El Paso flights
Syracuse to Hobby flights
Buffalo to Love Field flights
LaGuardia to El Paso flights
White Plains to Hobby flights
White Plains to Dallas/Fort Worth flights
White Plains to Austin flights
Albany to George Bush Intcntl flights
Stewart to Austin flights
Albany to Austin flights
Rochester to Austin flights
Syracuse to George Bush Intcntl flights
White Plains to George Bush Intcntl flights
Syracuse to Austin flights
Stewart to Dallas/Fort Worth flights
Buffalo to San Antonio flights
White Plains to San Antonio flights
Buffalo to Austin flights
Rochester to Love Field flights
Syracuse to San Antonio flights
Stewart to George Bush Intcntl flights
Albany to Love Field flights

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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$320Average$472FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.