ISP - AUS

$117 Find Cheap Flights from Islip to Austin

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 9/25. 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

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
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Flights 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, Aug 14 - Mon, Aug 18
Frontier Logo
6:00 am - 3:51 pmISP-AUS
10h 51m1 stop
Frontier Logo
10:36 am - 7:52 pmAUS-ISP
8h 16m1 stop
$258Frontier
Find Deal
Wed, Aug 20 - Mon, Sep 1
Frontier Logo
8:00 am - 8:05 amISP-AUS
25h 05m1 stop
Frontier Logo
6:20 pm - 11:59 pmAUS-ISP
28h 39m1 stop
$295Frontier
Find Deal
Tue, Sep 30 - Thu, Oct 2
Southwest Logo
5:30 am - 12:15 pmISP-AUS
7h 45m1 stop
Southwest Logo
4:20 pm - 11:45 pmAUS-ISP
6h 25m1 stop
$346Southwest
Find Deal
Tue, Sep 30 - Thu, Oct 2
Southwest Logo
6:05 am - 12:15 pmISP-AUS
7h 10m2 stops
Southwest Logo
4:20 pm - 11:45 pmAUS-ISP
6h 25m1 stop
$351Southwest
Find Deal
Sun, Aug 17 - Sun, Aug 24
Frontier Logo
6:00 am - 9:40 amISP-AUS
28h 40m1 stop
Frontier Logo
9:00 am - 8:08 amAUS-ISP
22h 08m1 stop
$355Frontier
Find Deal
Tue, Sep 30 - Thu, Oct 2
Southwest Logo
4:00 pm - 11:05 pmISP-AUS
8h 05m2 stops
Southwest Logo
2:45 pm - 11:45 pmAUS-ISP
8h 00m2 stops
$356Southwest
Find Deal
Thu, Oct 2 - Tue, Oct 7
Southwest Logo
5:35 pm - 12:25 amISP-AUS
7h 50m2 stops
Southwest Logo
6:25 am - 3:20 pmAUS-ISP
7h 55m2 stops
$373Southwest
Find Deal
Wed, Aug 20 - Mon, Sep 1
Southwest Logo
2:05 pm - 9:35 pmISP-AUS
8h 30m2 stops
Southwest Logo
5:40 am - 12:00 pmAUS-ISP
5h 20m1 stop
$385Southwest
Find Deal
Wed, Aug 20 - Mon, Sep 1
Southwest Logo
2:05 pm - 9:35 pmISP-AUS
8h 30m2 stops
Southwest Logo
8:15 am - 4:30 pmAUS-ISP
7h 15m2 stops
$515Southwest
Find Deal
Sun, Aug 17 - Sun, Aug 24
 Logo
7:39 pm - 12:59 amISP-AUS
30h 20m3 stops
 Logo
7:15 am - 10:04 amAUS-ISP
25h 49m3 stops
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 72 hours.

In the past 3 days, the cheapest round-trip tickets from Islip to Austin were found on Frontier ($258) and Southwest ($346).

Good to know

Low seasonSeptember
Cheapest flight$117
Best time to beat the crowds with an average 56% drop in price.
Most popular time to fly and prices are also 2% lower on average.
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 3 days, the lowest price for a flight from Islip to Austin was $117 for a one-way ticket and $258 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 4241 reviews
8.1Boarding
8.6Crew
7.5Entertainment
7.0Food
8.0Comfort
Airline reviews

It was one and half hour late... Not sure if any other experience matters.

4.0 OkaySudhir, Jul 2025LGA - MCI
Read more Southwest reviews

It was one and half hour late... Not sure if any other experience matters.

Multiple delays and gate changes. Arrived at final destination 6 hours late. All rental cars had been taken.

It was 2 hours 45 minutes late, for no apparently clear reason.

The movies using Southwest WiFi kept pausing and I had to restart multiple times.

It went well. Plane wasn't full. Will be great when assigned seating is in place

First, my flight was a usual flight nothing exceptional or unexpected. Over all it was a normal, good flight! Second, your questionaire is wholly lacking in the proper options to which one can answer a question. Often on short flights, there is no food let alone entertainment so why isn't that reflected in your questionaire? A simple "not applicable" would cover that issue appropriately but no, your form arbitrarily enters an answer based on the initial assessment which normally isn't factual. Until you provide an accurate means of assessing flights, I'll no longer be completing of these unimpressive and misleading assessements. Thank you!

Easy to book and to get check in and get on and off.

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.

Service was great, boarding and exiting went smoothly, and the flight was very pleasant.

Everything worked well. Crew was as entertaining as is possible on a plane flight. Southwest still has good legroom:

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

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