$65 Find Cheap Flights from Islip to Houston

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 Houston departing on 2/21. 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 Houston

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to Houston, 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 Houston, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$183
Frontier
Thu 1/8Mon 1/12
ISP - IAH • 1 stop
Cheapest one-way
$65
Frontier
Sat 2/21
ISP - IAH • 1 stop
Top airlines
Frontier
Cheapest • from $183 (round-trip)
Southwest
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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We hope you love your trip to Houston!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Islip to Houston (ISP-HOU)

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

Thu, Jan 8 - Mon, Jan 12
Frontier Logo
8:40 pm - 10:01 am
ISP
-
IAH
14h 21m1 stop
Frontier Logo
8:13 pm - 10:46 pm
IAH
-
ISP
25h 33m1 stop
$183Frontier
Fri, Feb 27 - Mon, Mar 2
Frontier Logo
8:33 am - 6:28 pm
ISP
-
IAH
10h 55m1 stop
Frontier Logo
7:45 am - 2:39 pm
IAH
-
ISP
5h 54m1 stop
$217Frontier
Sun, Jan 11 - Sat, Jan 17
Frontier Logo
8:40 pm - 10:01 am
ISP
-
IAH
14h 21m1 stop
Frontier Logo
8:16 pm - 8:55 am
IAH
-
ISP
11h 39m1 stop
$237Frontier
Fri, Jan 23 - Sun, Jan 25
Frontier Logo
9:43 pm - 9:00 am
ISP
-
IAH
12h 17m1 stop
Frontier Logo
8:18 pm - 6:48 pm
IAH
-
ISP
21h 30m1 stop
$241Frontier
Mon, Jan 12 - Mon, Jan 19
Multiple Airlines Logo
2:01 pm - 9:02 pm
ISP
-
IAH
8h 01m1 stop
Multiple Airlines Logo
6:00 am - 11:59 am
IAH
-
ISP
28h 59m2 stops
$251Multiple Airlines
Thu, Jan 22 - Sun, Jan 25
Frontier Logo
7:43 pm - 9:00 am
ISP
-
IAH
14h 17m1 stop
Frontier Logo
8:18 pm - 6:48 pm
IAH
-
ISP
21h 30m1 stop
$268Frontier
Tue, Dec 30 - Sat, Jan 3
Southwest Logo
6:00 pm - 12:05 am
ISP
-
HOU
7h 05m1 stop
Southwest Logo
5:40 am - 11:45 am
HOU
-
ISP
5h 05m1 stop
$436Southwest
Sat, Jan 3 - Sun, Jan 4
Southwest Logo
5:55 pm - 11:50 pm
ISP
-
HOU
6h 55m1 stop
Southwest Logo
3:55 pm - 11:55 pm
HOU
-
ISP
7h 00m2 stops
$441Southwest
Sat, Jan 3 - Sun, Jan 4
Southwest Logo
5:55 pm - 11:50 pm
ISP
-
HOU
6h 55m1 stop
Southwest Logo
8:40 pm - 10:15 am
HOU
-
ISP
12h 35m1 stop
$452Southwest
Fri, Jan 2 - Sun, Jan 4
Southwest Logo
5:50 pm - 12:20 am
ISP
-
HOU
7h 30m1 stop
Southwest Logo
3:55 pm - 11:55 pm
HOU
-
ISP
7h 00m2 stops
$460Southwest
Booking Insights

KAYAK's insights & trends for Islip to Houston flights

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

What’s the cheapest day of the week to fly from Islip to Houston?

The average price of all round-trip flights from Islip to Houston clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Islip to Houston, look for departures on Saturdays and avoid leaving on a Thursday, as it's usually the priciest day. When flying back from Houston, Thursday is the cheapest day to fly and Tuesday is the most expensive.

Find deals

Good to know

Cheapest flight$65
Flight from Islip to Houston George Bush Airport

When to book flights from Islip to Houston

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

  • What is the cheapest flight from Islip to Houston?

    In the last 3 days, the lowest price for a flight from Islip to Houston was $65 for a one-way ticket and $183 for a round-trip.

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

    Yes, you'll most likely have to show a valid passport before boarding the plane in Islip and on arrival in Houston.

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

    When flying out of Islip you will be using Islip Long Island. You will be landing at one of these airports: Houston Hobby or Houston George Bush Intcntl.

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

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

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

    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 Houston.

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

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

    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 Houston with an airline and back to Islip with another airline.

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

    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 Houston 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 Houston

 
See real verified KAYAK customer reviews for airlines flying from Islip to Houston. 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 Houston? 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 4251 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

Was good. I miss the free 2 checked bags. That was part of what made Southwest special

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.

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

Information on your arrival and departure airports

Islip (ISP)