ISP - AUS

$171 Find Cheap Flights from Islip to Austin - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Islip to Austin departing on 8/18. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Austin

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to Austin, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to Austin, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$363
Southwest
Thu 9/3Mon 9/7
ISP - AUS • 1 stop
Cheapest one-way
$171
Multiple Airlines
Tue 8/18
ISP - AUS • 2 stops
Top airlines
Southwest
Cheapest • from $363 (round-trip)
Southwest
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Islip and Austin. You'll need at least 1 connection.
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We hope you love your trip to Austin!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Islip to Austin (ISP-AUS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Islip to Austin that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Islip to Austin

Thu, Sep 3 - Mon, Sep 7
Southwest Logo
6:10 am - 10:50 am
ISP
-
AUS
5h 40m
1 stop
Southwest Logo
5:00 am - 11:55 am
AUS
-
ISP
5h 55m
1 stop
$363Southwest
Thu, Sep 3 - Mon, Sep 7
Southwest Logo
1:15 pm - 10:40 pm
ISP
-
AUS
10h 25m
2 stops
Southwest Logo
5:00 am - 11:55 am
AUS
-
ISP
5h 55m
1 stop
$368Southwest
Sat, Aug 29 - Tue, Sep 1
JetBlue Logo
6:00 am - 1:57 pm
ISP
-
AUS
8h 57m
1 stop
JetBlue Logo
1:00 pm - 10:56 pm
AUS
-
ISP
8h 56m
1 stop
$403JetBlue
Tue, Jul 14 - Thu, Jul 16
JetBlue Logo
6:00 am - 2:06 pm
ISP
-
AUS
9h 06m
1 stop
JetBlue Logo
1:00 pm - 9:44 pm
AUS
-
ISP
7h 44m
1 stop
$413JetBlue
Wed, Aug 19 - Sun, Aug 23
Southwest Logo
12:55 pm - 6:15 pm
ISP
-
AUS
6h 20m
1 stop
Southwest Logo
8:55 am - 3:55 pm
AUS
-
ISP
6h 00m
1 stop
$415Southwest
Wed, Aug 19 - Sun, Aug 23
Southwest Logo
6:05 am - 11:30 am
ISP
-
AUS
6h 25m
1 stop
Southwest Logo
10:50 am - 6:45 pm
AUS
-
ISP
6h 55m
2 stops
$420Southwest
Wed, Aug 19 - Sun, Aug 23
Southwest Logo
6:05 am - 12:50 pm
ISP
-
AUS
7h 45m
2 stops
Southwest Logo
6:15 am - 3:55 pm
AUS
-
ISP
8h 40m
2 stops
$425Southwest
Mon, Jul 13 - Wed, Jul 15
JetBlue Logo
6:00 am - 11:48 am
ISP
-
AUS
6h 48m
1 stop
JetBlue Logo
1:00 pm - 9:44 pm
AUS
-
ISP
7h 44m
1 stop
$435JetBlue
Mon, Jul 13 - Thu, Jul 16
JetBlue Logo
6:00 am - 11:48 am
ISP
-
AUS
6h 48m
1 stop
JetBlue Logo
1:00 pm - 9:44 pm
AUS
-
ISP
7h 44m
1 stop
$445JetBlue
Sat, Jul 25 - Tue, Jul 28
JetBlue Logo
6:00 am - 11:48 am
ISP
-
AUS
6h 48m
1 stop
JetBlue Logo
1:00 pm - 9:44 pm
AUS
-
ISP
7h 44m
1 stop
$457JetBlue
Booking Insights

KAYAK's insights & trends for Islip to Austin flights

Get data-powered insights and trends into flights from Islip to Austin to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Islip to Austin?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 5 days.

In the past 5 days, the cheapest round-trip tickets from Islip to Austin were found on Southwest ($363) and JetBlue ($403).

Find deals

Good to know

Cheapest flight$171
Flight from Islip to Austin

When to book flights from Islip to Austin

Are your dates flexible? Find out the best times to travel from Islip to Austin based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Islip to Austin

  • What is the cheapest flight from Islip to Austin?

    In the last 5 days, the lowest price for a flight from Islip to Austin was $171 for a one-way ticket and $363 for a round-trip.

  • Do I need a passport to fly between Islip and Austin?

    No, a passport isn't needed to fly from Islip to Austin. However, local authorities might ask for an official ID.

  • Which aircraft models fly most regularly from Islip to Austin?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Islip to Austin?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Islip to Austin.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Islip to Austin?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Austin from Islip is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Islip to Austin?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Austin with an airline and back to Islip with another airline. Booking your flights between Islip and AUS can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Islip to Austin?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Austin from Islip up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Islip to Austin

 
See real verified KAYAK customer reviews for airlines flying from Islip to Austin. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Islip to Austin? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
SouthwestOverall score based on 4235 reviews
8.0Comfort
8.6Crew
7.5Entertainment
7.0Food
8.1Boarding
Airline reviews

Flight coming out of Buffalo was delayed, so we had to be rescheduled on another flight from Baltimore to Phoenix which means we had a long layover and got home 3.5 hours late. Shuttle to parking stopped at 10pm, so we had to pay for an Uber to the parking lot and got charged an extra day of parking since it was after midnight. Not the best experience. Long day!

2.0 MediocreDawn, Jun 2026
BUF - BWI
Read more Southwest reviews

Flight coming out of Buffalo was delayed, so we had to be rescheduled on another flight from Baltimore to Phoenix which means we had a long layover and got home 3.5 hours late. Shuttle to parking stopped at 10pm, so we had to pay for an Uber to the parking lot and got charged an extra day of parking since it was after midnight. Not the best experience. Long day!

One major problem that was very unprofessional and uncalled for. Plane landed and we had to wait 20 minutes to get off the plane since they were waiting for someone to come to the gate to drive the jetway. Southwest couldn't have someone available and waiting for the plane to land? Is there only one person in Hobby airport who knows to drive the jetway? Was he at lunch? In the bar? Uncomfortable and uncalled for!

Southwest is kind of a slum airline. It’s gotten more expensive over the years for less and less service. I am a Southwest Chase Visa card holder and was forced to choose a seat in the 26th row in the middle seat. However my wife who is a rewards member but doesn’t hold a card or anything else, gets randomly assigned a normally paid seat in row 6! How does that work?

The seat was not comfortable. 1D. My back was sore all night and the next day.

One of the best airlines for fast boarding, on time arrivals, and top notch service!

I elected to pay for the upgrades and found very little difference

The new seating arrangement is so over priced for what you get.

Snacks are always pretzels. Why can't you also offer peanuts ?

Flight was hours late, unable to sit next to spouse, I have had so much better experiences. Substantially better, only saving grace was that it was a short flight.

An entire day of delays. Cost lots of money. Meals and a hotel.

Everything you need to know for your flight from Islip to Austin

Information on your arrival and departure airports

Islip (ISP)
Austin (AUS)