ISP - AUS

$126 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 2/1. 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
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Everything you should know

Cheapest round-trip
$217
Frontier
Sun 1/18Thu 1/22
ISP - AUS • 1 stop
Cheapest one-way
$126
Frontier
Sun 2/1
ISP - AUS • 1 stop
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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

Sun, Jan 18 - Thu, Jan 22
Frontier Logo
9:52 am - 6:34 pm
ISP
-
AUS
9h 42m1 stop
Frontier Logo
11:16 am - 6:48 pm
AUS
-
ISP
6h 32m1 stop
$217Frontier
Thu, Jan 15 - Sun, Jan 18
Multiple Airlines Logo
7:58 pm - 4:04 pm
ISP
-
AUS
21h 06m1 stop
Multiple Airlines Logo
10:58 am - 11:59 pm
AUS
-
ISP
12h 01m2 stops
$327Multiple Airlines
Fri, Feb 6 - Sun, Feb 15
Frontier Logo
9:43 pm - 10:21 am
ISP
-
AUS
13h 38m1 stop
Frontier Logo
10:46 am - 7:06 pm
AUS
-
ISP
7h 20m1 stop
$336Frontier
Thu, Jan 15 - Sun, Jan 18
Southwest Logo
11:50 am - 5:15 pm
ISP
-
AUS
6h 25m1 stop
Southwest Logo
5:45 am - 11:55 am
AUS
-
ISP
5h 10m1 stop
$420Southwest
Thu, Jan 15 - Sun, Jan 18
Southwest Logo
5:55 am - 2:20 pm
ISP
-
AUS
9h 25m2 stops
Southwest Logo
7:25 am - 4:15 pm
AUS
-
ISP
7h 50m2 stops
$440Southwest
Wed, Dec 31 - Sun, Jan 4
Multiple Airlines Logo
5:27 pm - 8:08 am
ISP
-
AUS
15h 41m1 stop
Multiple Airlines Logo
6:00 am - 1:45 pm
AUS
-
ISP
30h 45m2 stops
$533Multiple Airlines
Wed, Dec 31 - Sun, Jan 4
Multiple Airlines Logo
5:27 pm - 8:08 am
ISP
-
AUS
15h 41m1 stop
Multiple Airlines Logo
6:00 am - 1:09 pm
AUS
-
ISP
30h 09m1 stop
$544Multiple Airlines
Thu, Jan 1 - Mon, Jan 5
Multiple Airlines Logo
4:40 pm - 5:10 pm
ISP
-
AUS
25h 30m2 stops
Multiple Airlines Logo
6:00 am - 7:39 pm
AUS
-
ISP
12h 39m1 stop
$545Multiple Airlines
Thu, Jan 1 - Mon, Jan 5
Multiple Airlines Logo
4:40 pm - 12:58 am
ISP
-
AUS
9h 18m1 stop
Multiple Airlines Logo
6:00 am - 7:39 pm
AUS
-
ISP
12h 39m1 stop
$646Multiple Airlines
Wed, Dec 31 - Sun, Jan 4
Multiple Airlines Logo
7:25 am - 9:57 pm
ISP
-
AUS
15h 32m2 stops
Multiple Airlines Logo
5:30 am - 8:36 am
AUS
-
ISP
26h 06m2 stops
$967Multiple Airlines
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 fly non-stop between Islip and Austin?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Islip to Austin.

There is just one airline that flies from Islip to Austin direct and that is Southwest. The best round-trip deal found from Southwest for the route is $320.

Find deals

Good to know

Low seasonSeptember
Cheapest flight$126
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly and prices are also 8% 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 $126 for a one-way ticket and $217 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 4250 reviews
8.6Crew
8.0Comfort
7.5Entertainment
7.0Food
8.1Boarding
Airline reviews

Airline travel is always too cramped to really be pleasant, but the cabin crew on this flight did a pretty good job of making up for it by putting on some music during boarding and sprinkling a few funny remarks into the safety briefing and announcements, and just generally being friendly and helpful. It definitely reminded me of why I prefer the in-flight experience on Southwest!

10.0 ExcellentDavid, Nov 2025
BUF - PHX
Read more Southwest reviews

Airline travel is always too cramped to really be pleasant, but the cabin crew on this flight did a pretty good job of making up for it by putting on some music during boarding and sprinkling a few funny remarks into the safety briefing and announcements, and just generally being friendly and helpful. It definitely reminded me of why I prefer the in-flight experience on Southwest!

No delays and arrived to destination 30 min early. Staff was super friendly.

Everything a cheap airline should be at normal airline rates.

Full cans of soda would be nice. A choice between two snacks would be appreciated.

Tried watching free movie and it kept freezing so I couldn’t finish.

I was re-booked onto another flight because my original flight was delayed and I would have missed my connector. I ended up in the “C” group after paying extra to be in the “A “ group on the original flight. At least if you’re going to re-book people, re-book them into the same group.

Flight was delayed due to plane not passing inspection And one of the crew had to time out and we had to wait for another one A 3 hour delay

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.

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

Information on your arrival and departure airports

Islip (ISP)
Austin (AUS)