$138+ Cheap flights from Islip, NY to Austin (ISP - AUS)
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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — AUS
Nov 27 — Dec 41
Round-trip
1 adult, Economy
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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
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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 Islip to Austin
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Cheapest flights from Islip to AustinExplore 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 October 28, 2026.
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 October 28, 2026.
This Southwest deal was found by Cheapflights users on 10/25. 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 12/305:35 am -
1 stop9h 55m
Wed 1/65:40 am -
1 stop5h 10m
Deal found 10/25![Southwest logo]()
$494
This Southwest deal was found by Cheapflights users on 10/26. 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.
Mon 11/95:40 pm -
1 stop6h 55m
Fri 11/133:25 pm -
1 stop7h 10m
Deal found 10/26![Southwest logo]()
$517
This Southwest deal was found by Cheapflights users on 10/26. 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 12/225:40 am -
1 stop9h 50m
Mon 12/284:35 pm -
1 stop6h 05m
Deal found 10/26![Southwest logo]()
$531
This KAYAK deal was found by Cheapflights users on 10/23. 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.
Wed 12/26:00 am -
1 stop9h 36m
Mon 12/710:35 am -
1 stop10h 29m
Deal found 10/23![JetBlue logo]()
$554
This Southwest deal was found by Cheapflights users on 10/25. 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 12/294:55 pm -
2 stops8h 50m
Wed 1/63:20 pm -
1 stop5h 10m
Deal found 10/25![Southwest logo]()
$568
This Kiwi.com deal was found by Cheapflights users on 10/25. 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.
Sun 11/224:40 pm -
1 stop28h 34m
Sun 11/299:17 pm -
2 stops37h 03m
Deal found 10/25![Multiple Airlines logo]()
$570
This Expedia deal was found by Cheapflights users on 10/25. 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.
Mon 11/96:00 am -
1 stop13h 30m
Fri 11/137:15 am -
1 stop13h 22m
Deal found 10/25![JetBlue logo]()
$573
Best flights from Islip to AustinDiscover carefully curated flight deals from Islip to Austin that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 28, 2026.
Discover carefully curated flight deals from Islip to Austin that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 28, 2026.
This Southwest deal was found by Cheapflights users on 10/27. 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.
Fri 1/1510:45 am -
1 stop7h 30m
Tue 1/195:40 am -
1 stop5h 10m
Deal found 10/27![Southwest logo]()
$397
This KAYAK deal was found by Cheapflights users on 10/23. 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.
Wed 12/26:00 am -
1 stop9h 36m
Mon 12/710:35 am -
1 stop10h 29m
Deal found 10/23![JetBlue logo]()
$554
This Southwest deal was found by Cheapflights users on 10/27. 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.
Tue 11/106:30 am -
1 stop7h 45m
Fri 11/135:30 pm -
1 stop5h 05m
Deal found 10/27![Southwest logo]()
$517
This Southwest deal was found by Cheapflights users on 10/26. 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.
Mon 11/94:25 pm -
2 stops9h 40m
Fri 11/133:25 pm -
1 stop7h 10m
Deal found 10/26![Southwest logo]()
$522
This Southwest deal was found by Cheapflights users on 10/26. 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 12/225:40 am -
1 stop9h 50m
Mon 12/284:35 pm -
1 stop6h 05m
Deal found 10/26![Southwest logo]()
$531
This Southwest deal was found by Cheapflights users on 10/25. 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 11/114:05 pm -
1 stop6h 10m
Mon 11/165:55 am -
1 stop4h 50m
Deal found 10/25![Southwest logo]()
$613
Last-minute flights from Islip to AustinDiscover last-minute flight deals from Islip to Austin. Data last updated October 28, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to Austin. Data last updated October 28, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 10/26. 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.
Mon 11/95:40 pm -
1 stop6h 55m
Fri 11/133:25 pm -
1 stop7h 10m
Deal found 10/26![Southwest logo]()
$517
This Expedia deal was found by Cheapflights users on 10/25. 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.
Mon 11/96:00 am -
1 stop13h 30m
Fri 11/137:15 am -
1 stop13h 22m
Deal found 10/25![JetBlue logo]()
$573
This Southwest deal was found by Cheapflights users on 10/25. 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 11/114:05 pm -
1 stop6h 10m
Mon 11/165:55 am -
1 stop4h 50m
Deal found 10/25![Southwest logo]()
$613
This Southwest deal was found by Cheapflights users on 10/27. 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.
Wed 11/114:05 pm -
1 stop6h 10m
Sun 11/155:40 am -
1 stop5h 05m
Deal found 10/27![Southwest logo]()
$664
This JetBlue deal was found by Cheapflights users on 10/26. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:00 am -
1 stop6h 57m
Tue 11/171:00 pm -
1 stop7h 37m
Deal found 10/26![JetBlue logo]()
$634
This Kiwi.com deal was found by Cheapflights users on 10/25. 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.
Sun 11/224:40 pm -
1 stop28h 34m
Sun 11/299:17 pm -
2 stops37h 03m
Deal found 10/25![Multiple Airlines logo]()
$570
One-way flights from Islip to AustinSearch for one-way flight options from Islip to Austin. Find affordable one-way fares based on user searches. Data last updated October 28, 2026.
Search for one-way flight options from Islip to Austin. Find affordable one-way fares based on user searches. Data last updated October 28, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Tue 11/171:38 pm -
3 stops23h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Multiple Airlines logo]()
$138
This Southwest deal was found by Cheapflights users on 10/28. 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.
Tue 11/174:05 pm -
1 stop6h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Southwest logo]()
$165
This CheapOair deal was found by Cheapflights users on 10/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/86:33 pm -
1 stop17h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Frontier logo]()
$231
This KAYAK deal was found by Cheapflights users on 10/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:00 am -
1 stop9h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![JetBlue logo]()
$305
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/412:00 pm -
2 stops26h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Multiple Airlines logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/810:57 am -
2 stops25h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Multiple Airlines logo]()
$335
This KAYAK deal was found by Cheapflights users on 10/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/246:00 am -
1 stop9h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![JetBlue logo]()
$385
This Southwest deal was found by Cheapflights users on 10/25. 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 12/265:30 am -
1 stop7h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Southwest logo]()
$409
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 October 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $390 (Kiwi.com) |
One-way from | $138 (Kiwi.com) |
Popular in | October |
Cheapest in | January |
Average price | $590 |
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 7,457,451 searches. Data last updated October 28, 2026.
Use the filters below to find and compare flights from Islip to Austin that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
IslipAustin
ISP Islip Long Island - AUS Austin Bergstrom
ISPAUS
Islip Long Island
Tue 11/17
1:38 pm-11:39 am
3 stops23h 01m
Austin Bergstrom
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$138
Quickest round-trip
IslipAustin
ISP Islip Long Island - AUS Austin Bergstrom
ISPAUS
Islip Long Island
Tue 11/17
4:05 pm-9:15 pm
1 stop6h 10m
Austin Bergstrom
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$165
IslipAustin
ISP Islip Long Island - AUS Austin Bergstrom
ISPAUS
Islip Long Island
Wed 11/4
12:00 pm-1:54 pm
2 stops26h 54m
Austin Bergstrom
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$324
IslipAustin
ISP Islip Long Island - AUS Austin Bergstrom
ISPAUS
Islip Long Island
Sun 11/8
10:57 am-11:39 am
2 stops25h 42m
Austin Bergstrom
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$335
IslipAustin
ISP Islip Long Island - AUS Austin Bergstrom
ISPAUS
Islip Long Island
Fri 1/15
10:45 am-5:15 pm
1 stop7h 30m
Austin Bergstrom
Tue 1/19
5:40 am-11:50 am
1 stop5h 10m
$397
IslipAustin
ISP Islip Long Island - AUS Austin Bergstrom
ISPAUS
Islip Long Island
Sat 12/26
5:30 am-11:45 am
1 stop7h 15m
Austin Bergstrom
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$409
IslipAustin
ISP Islip Long Island - AUS Austin Bergstrom
ISPAUS
Islip Long Island
Wed 11/4
6:00 am-11:13 pm
1 stop18h 13m
Austin Bergstrom
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$427
IslipAustin
ISP Islip Long Island - AUS Austin Bergstrom
ISPAUS
Islip Long Island
Tue 11/3
6:00 am-11:59 am
1 stop6h 59m
Austin Bergstrom
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$440
IslipAustin
ISP Islip Long Island - AUS Austin Bergstrom
ISPAUS
Islip Long Island
Fri 11/6
6:00 am-11:57 am
1 stop6h 57m
Austin Bergstrom
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$440
IslipAustin
ISP Islip Long Island - AUS Austin Bergstrom
ISPAUS
Islip Long Island
Mon 11/2
6:00 am-11:59 am
1 stop6h 59m
Austin Bergstrom
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$440
Showing 1-10 of 15 resultsSorted by cheapest first
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 October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- 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.
ISP-AUS
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 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 October 28, 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.
Boarding
8.1
Overall
7.9
Crew
8.6
Entertainment
7.4
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Boarding
8.1
Overall
7.9
Crew
8.6
Entertainment
7.4
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
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.
Traveling to a place near Austin?
Book flights to Austin if you plan to visit one of these locationsRound Rock
Cedar Park
San Marcos
Bastrop
Fredericksburg
Pflugerville
Georgetown
Dripping Springs
Seguin
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Explore flights to Austin departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 28, 2026.
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Islip and Austin flights
Browse other Islip and Austin flight options. Last updated on October 28, 2026.
Other flights from Islip
Browse through other flights departing from Islip. Flights are based on user searches made on Cheapflights and were last updated on October 28, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 7,457,451 searches. Data last updated October 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$362 | Average$472 | FlexibilityNo cancel fee | On-time63% |