ISP

$122 Find Cheap Flights from Houston 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 Houston to Islip departing on 2/11. 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 Houston 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 Houston to Islip, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$264
Multiple Airlines
Fri 2/13Mon 2/16
IAH - ISP • 1 stop
Cheapest one-way
$122
Frontier
Wed 2/11
IAH - ISP • 1 stop
Top airlines
Frontier
Cheapest • from $271 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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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 Houston to Islip

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

Fri, Feb 13 - Mon, Feb 16
Multiple Airlines Logo
9:40 pm - 10:46 am
IAH
-
ISP
12h 06m
1 stop
Multiple Airlines Logo
7:49 pm - 5:12 pm
ISP
-
IAH
22h 23m
2 stops
$264Multiple Airlines
Sun, Feb 15 - Sun, Feb 22
Frontier Logo
8:18 pm - 7:38 am
IAH
-
ISP
10h 20m
1 stop
Frontier Logo
8:33 am - 7:00 am
ISP
-
IAH
23h 27m
1 stop
$271Frontier
Fri, Feb 13 - Mon, Feb 16
Multiple Airlines Logo
9:40 pm - 10:46 am
IAH
-
ISP
12h 06m
1 stop
Multiple Airlines Logo
3:34 pm - 6:47 pm
ISP
-
IAH
28h 13m
1 stop
$346Multiple Airlines
Fri, Mar 20 - Mon, Mar 23
Frontier Logo
9:03 pm - 9:48 am
IAH
-
ISP
11h 45m
1 stop
Frontier Logo
1:22 pm - 8:40 am
ISP
-
IAH
20h 18m
1 stop
$381Frontier
Fri, Mar 20 - Mon, Mar 23
Multiple Airlines Logo
11:07 am - 8:55 am
IAH
-
ISP
20h 48m
2 stops
Multiple Airlines Logo
1:22 pm - 8:40 am
ISP
-
IAH
20h 18m
1 stop
$445Multiple Airlines
Thu, Apr 2 - Sun, Apr 5
Frontier Logo
12:14 pm - 1:26 am
IAH
-
ISP
12h 12m
1 stop
Frontier Logo
8:36 pm - 7:02 am
ISP
-
IAH
11h 26m
1 stop
$459Frontier
Fri, Mar 20 - Mon, Mar 23
Multiple Airlines Logo
11:07 am - 8:55 am
IAH
-
ISP
20h 48m
2 stops
Multiple Airlines Logo
1:22 pm - 8:40 am
ISP
-
IAH
20h 18m
1 stop
$464Multiple Airlines
Fri, Feb 13 - Mon, Feb 16
Southwest Logo
5:10 pm - 11:30 pm
HOU
-
ISP
5h 20m
1 stop
Southwest Logo
5:35 pm - 12:35 am
ISP
-
HOU
8h 00m
1 stop
$466Southwest
Fri, Feb 13 - Mon, Feb 16
Southwest Logo
6:00 am - 5:00 pm
HOU
-
ISP
10h 00m
2 stops
Southwest Logo
5:35 pm - 12:35 am
ISP
-
HOU
8h 00m
1 stop
$482Southwest
Fri, Feb 13 - Mon, Feb 16
Southwest Logo
6:00 am - 5:00 pm
HOU
-
ISP
10h 00m
2 stops
Southwest Logo
1:10 pm - 11:10 pm
ISP
-
HOU
11h 00m
2 stops
$553Southwest
Booking Insights

KAYAK's insights & trends for Houston to Islip flights

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

Which airlines provide the cheapest flights from Houston 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 Houston to Islip were found on Frontier ($271) and Southwest ($466).

Good to know

Cheapest flight$122
Flight from Houston George Bush Airport to Islip

When to book flights from Houston to Islip

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

  • What is the cheapest flight from Houston to Islip?

    In the last 3 days, the lowest price for a flight from Houston to Islip was $122 for a one-way ticket and $264 for a round-trip.

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

    A passport is required to fly from Houston to Islip.

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

    On your way to Islip, you’ll fly out from one of these Houston airports: Houston Hobby or Houston George Bush Intcntl. You’ll be landing at Islip Long Island.

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

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

  • How does KAYAK find such low prices on flights from Houston 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 Houston to Islip.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Islip from Houston 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 Houston 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 Houston with another airline.

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

 
See real verified KAYAK customer reviews for airlines flying from Houston 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 Houston 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 4267 reviews
8.6Crew
7.0Food
7.5Entertainment
8.1Boarding
8.0Comfort
Airline reviews

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

10.0 ExcellentJohn, Jan 2026
SAT - PHX
Read more Southwest reviews

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.

AC sub par. WiFi not working correctly. Ac sucked. Seats very narrow.

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

after landing, we stay 2 hours on the taxi way before reaching the gate The airline and the crew were good though

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

Information on your arrival and departure airports