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Islip

$151+ Cheap flights from Austin to Islip (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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — ISP
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 September 11, 2025.

Round-trip from

$582
(Southwest)

One-way from

$151
(Kiwi.com)

Popular in

October

Cheapest in

January

Average price

$426
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 September 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 September 11, 2025.

This Southwest deal was found by Cheapflights users on 9/10. 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.
Tue 11/256:00 pmAUS - ISP
1 stop4h 55mSouthwest
Fri 11/285:50 amISP - AUS
1 stop7h 45mSouthwest
Deal found 9/10$582

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 September 11, 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

Tue 11/25

6:00 pm-11:55 pm

1 stop4h 55m

Islip Long Island

Fri 11/28

5:50 am-12:35 pm

1 stop7h 45m

$582

AustinIslip

AUS - ISP

AUSISP

Austin Bergstrom

Sun 10/12

9:09 pm-9:44 am

2 stops35h 35m

$151

AustinIslip

AUS - ISP

AUSISP

Austin Bergstrom

Thu 9/25

6:15 pm-10:40 am

1 stop15h 25m

$188

AustinIslip

AUS - ISP

AUSISP

Austin Bergstrom

Fri 9/26

4:20 pm-10:55 pm

1 stop5h 35m

$274

AustinIslip

AUS - ISP

AUSISP

Austin Bergstrom

Sun 10/26

11:24 am-8:52 pm

1 stop8h 28m

$302

AustinIslip

AUS - ISP

AUSISP

Austin Bergstrom

Wed 9/24

1:00 pm-10:05 pm

2 stops8h 05m

$314

AustinIslip

AUS - ISP

AUSISP

Austin Bergstrom

Thu 9/25

2:15 pm-1:24 pm

2 stops22h 09m

$408

AustinIslip

AUS - ISP

AUSISP

Austin Bergstrom

Thu 9/25

5:40 am-12:00 pm

1 stop5h 20m

$434

AustinIslip

AUS - ISP

AUSISP

Austin Bergstrom

Wed 9/24

7:05 am-8:01 pm

3 stops11h 56m

$468

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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?

Currently, January is the cheapest month in which you can book a flight from Austin to Islip (average of $108). Flying from Austin to Islip 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 September 11, 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
4,248 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

Comfort

8.0

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
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

Comfort

8.0

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.

  • How long is the flight from Austin to Islip?

    Southwest can get you from Austin to Islip in just under 4h 55m. Your travel time can differ by up to . There are 1556 mi between Austin and Islip.

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

    According to our current data, Southwest ($388), offers the cheapest pricing from Austin to Islip. This flight start at 15% lower than the current average price 3 months from now.

  • 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?

    Currently, January is the cheapest month in which you can book a flight from Austin to Islip (average of $108). Flying from Austin to Islip 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

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$388Average$531FlexibilityNo cancel feeOn-time63%

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