ISP - AUS

$130 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 9/3. 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

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Everything you should know

Cheapest round-trip
$279
Frontier
Mon 9/14Fri 9/18
ISP - AUS • 1 stop
Cheapest one-way
$130
Frontier
Thu 9/3
ISP - AUS • 1 stop
Top airlines
Frontier
Cheapest • from $279 (round-trip)
Southwest
Best reviews • 8.0 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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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

Mon, Sep 14 - Fri, Sep 18
Frontier Logo
5:43 pm - 10:03 am
ISP
-
AUS
17h 20m
1 stop
Frontier Logo
10:58 am - 4:58 pm
AUS
-
ISP
29h 00m
1 stop
$279Frontier
Mon, Aug 31 - Wed, Sep 2
Multiple Airlines Logo
6:00 am - 1:59 pm
ISP
-
AUS
8h 59m
1 stop
Multiple Airlines Logo
10:55 am - 9:53 am
AUS
-
ISP
21h 58m
1 stop
$280Multiple Airlines
Tue, Sep 1 - Wed, Sep 23
JetBlue Logo
6:00 am - 11:48 am
ISP
-
AUS
6h 48m
1 stop
JetBlue Logo
3:45 pm - 11:22 pm
AUS
-
ISP
6h 37m
1 stop
$289JetBlue
Wed, Sep 2 - Wed, Sep 23
JetBlue Logo
6:00 am - 11:48 am
ISP
-
AUS
6h 48m
1 stop
JetBlue Logo
3:45 pm - 11:22 pm
AUS
-
ISP
6h 37m
1 stop
$289JetBlue
Fri, Sep 4 - Thu, Sep 24
JetBlue Logo
6:00 am - 11:48 am
ISP
-
AUS
6h 48m
1 stop
JetBlue Logo
3:45 pm - 11:22 pm
AUS
-
ISP
6h 37m
1 stop
$289JetBlue
Mon, Aug 31 - Thu, Sep 24
JetBlue Logo
6:00 am - 11:48 am
ISP
-
AUS
6h 48m
1 stop
JetBlue Logo
3:45 pm - 11:22 pm
AUS
-
ISP
6h 37m
1 stop
$289JetBlue
Fri, Sep 4 - Sat, Sep 26
JetBlue Logo
6:00 am - 1:59 pm
ISP
-
AUS
8h 59m
1 stop
JetBlue Logo
3:45 pm - 11:22 pm
AUS
-
ISP
6h 37m
1 stop
$289JetBlue
Wed, Sep 2 - Sat, Sep 26
JetBlue Logo
6:00 am - 1:59 pm
ISP
-
AUS
8h 59m
1 stop
JetBlue Logo
3:45 pm - 11:22 pm
AUS
-
ISP
6h 37m
1 stop
$289JetBlue
Thu, Sep 10 - Wed, Sep 16
Southwest Logo
6:10 am - 10:50 am
ISP
-
AUS
5h 40m
1 stop
Southwest Logo
9:50 am - 5:00 pm
AUS
-
ISP
6h 10m
1 stop
$299Southwest
Sat, Sep 12 - Sat, Sep 19
Southwest Logo
3:15 pm - 8:00 pm
ISP
-
AUS
5h 45m
1 stop
Southwest Logo
5:45 am - 12:05 pm
AUS
-
ISP
5h 20m
1 stop
$299Southwest
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 Frontier ($279) and JetBlue ($289).

Find deals

Good to know

Cheapest flight

$130
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 $130 for a one-way ticket and $279 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.
8.0
SouthwestOverall score based on 4229 reviews
7.5Entertainment
8.0Comfort
8.1Boarding
7.0Food
8.6Crew
Airline reviews

Great job Southwest! My family doesn't fly often but we felt safe the whole time.

10.0 ExcellentK, Jun 2026
SAN - AUS
Read more Southwest reviews

Great job Southwest! My family doesn't fly often but we felt safe the whole time.

SW can't get their wifi right. I upgrade to insure wifi service but the last two trips had intermittent service. Not worth the extra costs.

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!

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

It seems as though the provisions are even less. Although SWA used to be an economy Airline, that isn't really the case anymore. I paid over $700. for a round trip to Denver and I could have flown just about any airline for the price. The drinks are now in a 6-ounce cup and with ice I'm sure a can would fill more than 2 cups. However, I am very proud of SWA for using paper rather than continuing to contribute to the millions of plastic cups being used each day. I've thought of this fr many years and am so glad to see it come to fruition, if not by only SWA so far.

Crew was great - friendly and helpful with boarding - letting folks know where overhead space was available thus getting us out of the gate on time.

AC wasn't working then we sat on the tarmac in Austin for 40 minutes waiting for a gate.

I stopped flying southwest a long time ago. I don’t care for their boarding process, especially when I have a family to try and seat together. The early bird check in made it so much easier. As long as you do that, it’s great.

Excellent! Very attentive & helpful during a weather delay to keep people safe, com, and informed!

Issue during taxi lead to two hours of sitting in the tarmac and a lot of miscommunication and confusion from flight crew

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

Information on your arrival and departure airports

Islip (ISP)
Austin (AUS)