AUS - ISP

$101 Find Cheap Flights from Austin to Islip

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Austin to Islip departing on 4/19. 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 Islip

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Austin to Islip, 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 Austin to Islip, 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
$240
Frontier
Thu 4/30Sun 5/3
AUS - ISP • 1 stop
Cheapest one-way
$101
Frontier
Sun 4/19
AUS - ISP • 1 stop
Top airlines
Frontier
Cheapest • from $240 (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 Austin and Islip. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Orlando (MCO)
Cheapest • Avg $343 (round-trip)
Baltimore (BWI)
Shortest trip • 5h 28m (one-way)
Insights
Insights
Insights
Insights
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Islip!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Austin to Islip (AUS-ISP)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Austin to Islip 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 Austin to Islip

Thu, Apr 30 - Sun, May 3
Frontier Logo
7:12 pm - 9:13 am
AUS
-
ISP
13h 01m
1 stop
Frontier Logo
4:07 pm - 6:17 pm
ISP
-
AUS
27h 10m
1 stop
$240Frontier
Thu, May 7 - Sun, May 10
Frontier Logo
8:36 pm - 9:13 am
AUS
-
ISP
11h 37m
1 stop
Frontier Logo
4:07 pm - 4:45 pm
ISP
-
AUS
25h 38m
2 stops
$280Frontier
Fri, Apr 3 - Tue, Apr 7
Multiple Airlines Logo
8:12 pm - 10:30 am
AUS
-
ISP
13h 18m
1 stop
Multiple Airlines Logo
6:00 am - 3:12 pm
ISP
-
AUS
34h 12m
2 stops
$291Multiple Airlines
Thu, Apr 2 - Sun, Apr 12
Multiple Airlines Logo
4:59 pm - 10:56 am
AUS
-
ISP
16h 57m
2 stops
Multiple Airlines Logo
12:08 pm - 7:17 pm
ISP
-
AUS
8h 09m
1 stop
$307Multiple Airlines
Thu, Apr 2 - Sun, Apr 12
Multiple Airlines Logo
8:12 pm - 10:56 am
AUS
-
ISP
13h 44m
1 stop
Multiple Airlines Logo
12:08 pm - 7:17 pm
ISP
-
AUS
8h 09m
1 stop
$314Multiple Airlines
Thu, May 7 - Sun, May 10
Frontier Logo
8:36 pm - 9:13 am
AUS
-
ISP
11h 37m
1 stop
Frontier Logo
4:07 pm - 7:46 pm
ISP
-
AUS
28h 39m
1 stop
$329Frontier
Mon, Jul 13 - Mon, Jul 20
Frontier Logo
5:16 pm - 9:08 am
AUS
-
ISP
14h 52m
1 stop
Frontier Logo
10:03 am - 4:21 pm
ISP
-
AUS
7h 18m
1 stop
$330Frontier
Thu, Apr 2 - Mon, Apr 6
Multiple Airlines Logo
8:12 pm - 10:56 am
AUS
-
ISP
13h 44m
1 stop
Multiple Airlines Logo
8:45 pm - 12:24 am
ISP
-
AUS
28h 39m
2 stops
$369Multiple Airlines
Fri, Apr 3 - Tue, Apr 7
Multiple Airlines Logo
8:12 pm - 10:30 am
AUS
-
ISP
13h 18m
1 stop
Multiple Airlines Logo
5:43 pm - 7:17 pm
ISP
-
AUS
26h 34m
1 stop
$384Multiple Airlines
Wed, Mar 25 - Sun, Mar 29
Multiple Airlines Logo
4:14 pm - 4:13 pm
AUS
-
ISP
22h 59m
2 stops
Multiple Airlines Logo
5:08 pm - 7:17 pm
ISP
-
AUS
27h 09m
1 stop
$386Multiple Airlines
Booking Insights

KAYAK's insights & trends for Austin to Islip flights

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

Which airlines provide the cheapest flights from Austin to Islip?

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 Austin to Islip were found on Frontier ($240) and Southwest ($413).

Good to know

Cheapest flight$101
Flight from Austin to Islip

When to book flights from Austin to Islip

Are your dates flexible? Find out the best times to travel from Austin to Islip 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 Austin to Islip

  • What is the cheapest flight from Austin to Islip?

    In the last 3 days, the lowest price for a flight from Austin to Islip was $101 for a one-way ticket and $240 for a round-trip.

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

    A passport is not required to fly from Austin to Islip.

  • Which airports will I be using when flying from Austin to Islip?

    Austin and Islip are both served by 1 main airport. You will leave Austin from Austin Bergstrom and will be arriving at Islip Long Island.

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

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

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

    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 Austin to Islip.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Islip from Austin 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 Austin to Islip?

    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 Islip with an airline and back to Austin with another airline. Booking your flights between Austin and ISP 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 Austin to Islip?

    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 Islip from Austin 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 Austin to Islip

 
See real verified KAYAK customer reviews for airlines flying from Austin to Islip. 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 Austin to Islip? 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 4317 reviews
8.1Boarding
8.6Crew
8.0Comfort
7.0Food
7.5Entertainment
Airline reviews

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

6.0 GoodChris, Mar 2026
DAL - SAT
Read more Southwest reviews

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

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.

I was assigned seat 7E, yet my boarding was Group 5, which caused me to have to put my luggage in the back of the plance above `19 or 20 aisle, as passengers who had boarded earlier took the overhead bins in the front. SW needs to monitor bin space and ensure that bin space above the seat are aligned to those sitting near their seats. Also the seating assignments needs to align with group number. Maybe board those last first and so on? Having said the ALL the passengers on the plane were gracious enough to allow me and other passengers in this dilema to retrieve our luggage and helped us along the way. I always love the flight staff, as always their fantastic and I can't rave about them enough!

Great vacation. Can't wait till next year for another one.

The flight crew was extremely rude and especially not helpful when our flight was delayed.

Pretty seamless, just a tad bit late in taking off and landing.

Check-in, Boarding and flight were smooth. All the employees and crew was very nice and funny. They gave the kids crayons and workbooks to keep them occupied which was a big win. I’ve flown Southwest many times and that’s the first time I’ve seen that and it is a great addition.

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

Had to get off plane from prior flight even though I had to reboard same plane to continue to my final destination.

Boarded on time but once we were ready for take off, the crew determined that, although every seat was taken, somehow someone was on the wrong flight. Delay, delay delay, announcements and ended up with one person checking EVERY ID against their passenger Manifest only to figure out it was a "clerical error." We departed 54 minutes late causing me to run in the St. Louis Airport to make my connection and lose the priority boarding spot I had paid for. Unnecessary delay.

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

Information on your arrival and departure airports