$185+ Cheap flights from Austin to Islip, NY (AUS - ISP)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/24. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — ISP
Oct 25 — Nov 11
Round-trip
1 adult, Economy
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Find cheap flights from Austin to Islip 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
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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 Austin to Islip
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Best
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Cheapest flights from Austin to IslipExplore 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 25, 2026.
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 25, 2026.
This Southwest deal was found by Cheapflights users on 9/21. 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.
Sat 10/315:45 am -
1 stop5h 10m
Sat 11/712:45 pm -
1 stop8h 55m
Deal found 9/21![Southwest logo]()
$299
This Southwest deal was found by Cheapflights users on 9/23. 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.
Fri 10/302:35 pm -
1 stop8h 05m
Sat 11/712:45 pm -
1 stop8h 55m
Deal found 9/23![Southwest logo]()
$310
This Frontier deal was found by Cheapflights users on 9/20. 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.
Thu 12/179:07 pm -
1 stop10h 54m
Mon 12/219:56 am -
1 stop11h 16m
Deal found 9/20![Frontier logo]()
$358
This Booking.com deal was found by Cheapflights users on 9/23. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1211:51 am -
1 stop29h 05m
Sun 11/156:33 pm -
1 stop17h 25m
Deal found 9/23![Frontier logo]()
$368
This Kiwi.com deal was found by Cheapflights users on 9/23. 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 11/123:43 pm -
2 stops21h 39m
Sun 11/156:33 pm -
1 stop17h 25m
Deal found 9/23![Multiple Airlines logo]()
$379
This Kiwi.com deal was found by Cheapflights users on 9/20. 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 10/315:57 pm -
1 stop23h 34m
Sun 11/86:33 pm -
2 stops25h 53m
Deal found 9/20![Frontier logo]()
$389
This Southwest deal was found by Cheapflights users on 9/21. 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.
Sun 12/135:30 pm -
1 stop5h 00m
Mon 12/144:05 pm -
1 stop6h 00m
Deal found 9/21![Southwest logo]()
$398
Best flights from Austin to IslipDiscover carefully curated flight deals from Austin to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 25, 2026.
Discover carefully curated flight deals from Austin to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 25, 2026.
This Southwest deal was found by Cheapflights users on 9/20. 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.
Sat 10/315:45 am -
1 stop5h 10m
Sat 11/712:45 pm -
1 stop8h 55m
Deal found 9/20![Southwest logo]()
$299
This Southwest deal was found by Cheapflights users on 9/23. 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.
Fri 10/302:35 pm -
1 stop8h 05m
Sat 11/712:45 pm -
1 stop8h 55m
Deal found 9/23![Southwest logo]()
$310
This Southwest deal was found by Cheapflights users on 9/21. 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.
Sun 12/135:30 pm -
1 stop5h 00m
Mon 12/144:05 pm -
1 stop6h 00m
Deal found 9/21![Southwest logo]()
$398
This Southwest deal was found by Cheapflights users on 9/22. 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.
Fri 2/56:25 am -
1 stop8h 30m
Sat 2/139:30 am -
1 stop12h 20m
Deal found 9/22![Southwest logo]()
$433
Last-minute flights from Austin to IslipDiscover last-minute flight deals from Austin to Islip. Data last updated September 25, 2026 and is based on user searches.
Discover last-minute flight deals from Austin to Islip. Data last updated September 25, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 9/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/84:27 pm -
2 stops24h 33m
Mon 10/126:55 pm -
1 stop16h 02m
Deal found 9/23![Frontier logo]()
$564
This KAYAK deal was found by Cheapflights users on 9/23. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/151:00 pm -
1 stop7h 37m
Mon 10/196:00 am -
1 stop7h 01m
Deal found 9/23![JetBlue logo]()
$555
This Southwest deal was found by Cheapflights users on 9/23. 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.
Fri 10/302:35 pm -
1 stop8h 05m
Sat 11/712:45 pm -
1 stop8h 55m
Deal found 9/23![Southwest logo]()
$310
This Southwest deal was found by Cheapflights users on 9/21. 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.
Sat 10/315:45 am -
1 stop5h 10m
Sat 11/712:45 pm -
1 stop8h 55m
Deal found 9/21![Southwest logo]()
$299
This Kiwi.com deal was found by Cheapflights users on 9/20. 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 10/315:57 pm -
1 stop23h 34m
Sun 11/86:33 pm -
2 stops25h 53m
Deal found 9/20![Frontier logo]()
$389
One-way flights from Austin to IslipSearch for one-way flight options from Austin to Islip. Find affordable one-way fares based on user searches. Data last updated September 25, 2026.
Search for one-way flight options from Austin to Islip. Find affordable one-way fares based on user searches. Data last updated September 25, 2026.
This Expedia deal was found by Cheapflights users on 9/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/249:07 pm -
1 stop10h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Frontier logo]()
$185
This Kiwi.com deal was found by Cheapflights users on 9/21. 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.
Tue 10/1312:08 pm -
2 stops45h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Multiple Airlines logo]()
$187
This Frontier deal was found by Cheapflights users on 9/22. 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 10/1910:52 am -
1 stop6h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Frontier logo]()
$200
This Southwest deal was found by Cheapflights users on 9/22. 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 12/245:55 am -
1 stop4h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Southwest logo]()
$224
This CheapOair deal was found by Cheapflights users on 9/23. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/210:58 am -
1 stop29h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Frontier logo]()
$266
This Southwest deal was found by Cheapflights users on 9/21. 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 10/131:45 pm -
1 stop5h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Southwest logo]()
$285
Find 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 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $299 (Southwest) |
One-way from | $185 (Expedia) |
Popular in | September |
Cheapest in | January |
Average price | $491 |
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 7,457,451 searches. Data last updated September 25, 2026.
Use the filters below to find and compare flights from Austin to Islip that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
AustinIslip
AUS Austin Bergstrom - ISP Islip Long Island
AUSISP
Austin Bergstrom
Mon 10/19
10:52 am-6:00 pm
1 stop6h 08m
Islip Long Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$236
AustinIslip
AUS Austin Bergstrom - ISP Islip Long Island
AUSISP
Austin Bergstrom
Thu 12/24
1:25 pm-9:40 pm
2 stops7h 15m
Islip Long Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$254
Quickest round-trip
AustinIslip
AUS Austin Bergstrom - ISP Islip Long Island
AUSISP
Austin Bergstrom
Tue 10/13
1:45 pm-8:00 pm
1 stop5h 15m
Islip Long Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$285
AustinIslip
AUS Austin Bergstrom - ISP Islip Long Island
AUSISP
Austin Bergstrom
Sat 10/31
5:45 am-11:55 am
1 stop5h 10m
Islip Long Island
Sat 11/7
12:45 pm-8:40 pm
1 stop8h 55m
$299
AustinIslip
AUS Austin Bergstrom - ISP Islip Long Island
AUSISP
Austin Bergstrom
Fri 10/30
2:35 pm-11:40 pm
1 stop8h 05m
Islip Long Island
Sat 11/7
12:45 pm-8:40 pm
1 stop8h 55m
$310
AustinIslip
AUS Austin Bergstrom - ISP Islip Long Island
AUSISP
Austin Bergstrom
Sun 12/13
5:30 pm-11:30 pm
1 stop5h 00m
Islip Long Island
Mon 12/14
4:05 pm-9:05 pm
1 stop6h 00m
$398
AustinIslip
AUS Austin Bergstrom - ISP Islip Long Island
AUSISP
Austin Bergstrom
Mon 10/5
3:45 pm-11:22 pm
1 stop6h 37m
Islip Long Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$422
AustinIslip
AUS Austin Bergstrom - ISP Islip Long Island
AUSISP
Austin Bergstrom
Mon 11/2
1:00 pm-9:37 pm
1 stop7h 37m
Islip Long Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$422
AustinIslip
AUS Austin Bergstrom - ISP Islip Long Island
AUSISP
Austin Bergstrom
Tue 12/29
10:01 am-5:27 pm
1 stop6h 26m
Islip Long Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$422
AustinIslip
AUS Austin Bergstrom - ISP Islip Long Island
AUSISP
Austin Bergstrom
Wed 10/7
3:45 pm-11:22 pm
1 stop6h 37m
Islip Long Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$422
Showing 1-10 of 14 resultsSorted by cheapest first
Compare providers for flights from Austin to Islip
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 Austin to Islip in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Austin-Islip, New York flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Austin-Islip, New York flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Austin-Islip, New York flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Austin-Islip, New York 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 Austin-Islip, New York 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 Austin to Islip
Have a flexible travel schedule? Discover the best time to fly to Islip from Austin with our price prediction graph.
AUS-ISP
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.
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 25, 2026.
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.
Overall
8.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentJustin,May 2024
AUS - SAN
Overall
8.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentJustin,May 2024
AUS - SAN
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.
Traveling to a place near Islip?
Book flights to Islip if you plan to visit one of these locationsRiverhead
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Other flights to Islip
Explore flights to Islip departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 25, 2026.
Austin and Islip flights
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Other flights from Austin
Browse through other flights departing from Austin. Flights are based on user searches made on Cheapflights and were last updated on September 25, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 7,457,451 searches. Data last updated September 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$390 | Average$526 | FlexibilityNo cancel fee | On-time63% |