HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
George Bush Intcntl

$100+ Cheap flights from Islip, NY (ISP) to George Bush Intcntl (IAH)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — IAH
May 26 — Jun 21
Tue 5/26
Tue 6/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Islip to George Bush Intcntl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Islip to George Bush Intcntl

Cheapest flights from Islip to George Bush Intcntl
Explore the most affordable flight options available from Islip to George Bush Intcntl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 26, 2026.

This CheapOair deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2711:00 am
ISP
-
IAH
1 stop22h 50m
Frontier
Mon 6/17:44 pm
IAH
-
ISP
1 stop20h 33m
Frontier
Deal found 4/26$230
This CheapOair deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/711:12 am
ISP
-
IAH
1 stop22h 38m
Frontier
Sun 5/107:28 pm
IAH
-
ISP
1 stop13h 37m
Frontier
Deal found 4/22$231
This CheapOair deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/1511:00 am
ISP
-
IAH
1 stop22h 50m
Frontier
Mon 5/187:44 pm
IAH
-
ISP
1 stop14h 16m
Frontier
Deal found 4/25$245
This Expedia deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/304:07 pm
ISP
-
IAH
1 stop26h 52m
Frontier
Sun 5/38:06 pm
IAH
-
ISP
1 stop12h 07m
Frontier
Deal found 4/22$251
This Expedia deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/611:00 am
ISP
-
IAH
1 stop22h 50m
Frontier
Sat 5/97:44 pm
IAH
-
ISP
1 stop13h 43m
Frontier
Deal found 4/22$252
This Expedia deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/304:07 pm
ISP
-
IAH
1 stop26h 52m
Frontier
Sat 5/26:57 pm
IAH
-
ISP
1 stop13h 16m
Frontier
Deal found 4/24$270
This Kiwi.com deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/711:12 am
ISP
-
IAH
1 stop21h 21m
Multiple Airlines
Fri 5/81:29 pm
IAH
-
ISP
1 stop19h 36m
Multiple Airlines
Deal found 4/23$296
This Kiwi.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/112:28 pm
ISP
-
IAH
2 stops32h 48m
Multiple Airlines
Fri 5/157:44 pm
IAH
-
ISP
1 stop13h 21m
Multiple Airlines
Deal found 4/24$298
This Kiwi.com deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/1110:48 am
ISP
-
IAH
2 stops21h 35m
Multiple Airlines
Tue 6/167:24 pm
IAH
-
ISP
1 stop13h 39m
Multiple Airlines
Deal found 4/22$322

Find flight deals from Islip to George Bush Intcntl

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to George Bush Intcntl (IAH). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$230
(CheapOair)

One-way from

$100
(Frontier)

Popular in

March

Cheapest in

January

Average price

$327
Provider with most accurate pricing for Islip Long Island-Houston George Bush Intcntl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Islip Long Island-Houston George Bush Intcntl flights.
Search Deals
From Islip Long Island to Houston George Bush Intcntl
Search Deals
One-way flight from Islip Long Island to Houston George Bush Intcntl
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to George Bush Intcntl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 26, 2026.
Use the filters below to find and compare flights from Islip to Houston George Bush Intcntl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 6/11

10:48 am-8:47 am

1 stop22h 59m

Houston George Bush Intcntl

Tue 6/16

7:24 pm-10:03 am

1 stop13h 39m

$230

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 5/7

11:12 am-8:50 am

1 stop22h 38m

Houston George Bush Intcntl

Sun 5/10

7:28 pm-10:05 am

1 stop13h 37m

$231

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Mon 5/11

11:00 am-9:00 am

1 stop23h 00m

Houston George Bush Intcntl

Fri 5/15

7:44 pm-10:05 am

1 stop13h 21m

$251

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 5/9

11:00 am-8:50 am

1 stop22h 50m

Houston George Bush Intcntl

Mon 5/11

7:44 pm-11:00 am

1 stop14h 16m

$252

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Mon 5/11

2:28 pm-10:16 pm

2 stops32h 48m

Houston George Bush Intcntl

Fri 5/15

7:44 pm-10:05 am

1 stop13h 21m

$298

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 4/30

4:07 pm-5:59 pm

1 stop26h 52m

Houston George Bush Intcntl

Sun 5/3

8:06 pm-9:13 am

1 stop12h 07m

$305

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 6/11

10:48 am-7:23 am

2 stops21h 35m

Houston George Bush Intcntl

Tue 6/16

7:24 pm-10:03 am

1 stop13h 39m

$322
Quickest round-trip

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 7/3

2:28 pm-8:02 am

2 stops18h 34m

Houston George Bush Intcntl

Wed 7/8

7:24 pm-10:03 am

1 stop13h 39m

$366

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 5/6

11:00 am-7:34 am

2 stops21h 34m

Houston George Bush Intcntl

Sat 5/9

7:44 pm-10:27 am

1 stop13h 43m

$420

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 4/30

4:07 pm-8:38 am

1 stop17h 31m

Houston George Bush Intcntl

Sun 5/3

9:40 pm-1:31 pm

2 stops14h 51m

$474

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/21

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

Compare providers for flights from Islip to George Bush Intcntl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to George Bush Intcntl in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Islip, New York-Houston George Bush Intcntl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-Houston George Bush Intcntl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-Houston George Bush Intcntl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Islip, New York-Houston George Bush Intcntl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip, New York-Houston George Bush Intcntl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Islip to George Bush Intcntl

Have a flexible travel schedule? Discover the best time to fly to George Bush Intcntl from Islip with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from Islip to George Bush Intcntl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Islip to Houston George Bush Intcntl?

    Islip Long Island (ISP), located 7.2 mi from the city center, is the airport you fly out of when you book flights from Islip to Houston George Bush Intcntl. 0 airlines have flights from Long Island to Houston George Bush Intcntl on a regular basis. Booking flights from Islip Long Island to Houston George Bush Intcntl should not be difficult; the airport handles an average of 0 outbound flights to Houston George Bush Intcntl per day.

  • How long is the flight from Islip, New York to Houston George Bush Intcntl Airport?

    There are many flights that can get you from Islip, New York to Houston George Bush Intcntl Airport in 22h 59m. Fly via Frontier to get the fastest option. The distance between Islip, New York and Houston George Bush Intcntl Airport is about 1451 mi.

  • Can I find deals for flights from Islip to George Bush Intcntl that include hotel bookings?

    Yes. In addition to deals on Islip to George Bush Intcntl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to George Bush Intcntl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to George Bush Intcntl.

  • Can I find deals for business class flights from Islip to George Bush Intcntl?

    Yes. Cheapflights offers flight deals from Islip to George Bush Intcntl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Houston George Bush Intcntl Airport?

Book flights to Houston George Bush Intcntl Airport if you plan to visit one of these locations
Katy
The Woodlands
Spring
Jersey Village
Humble
Tomball
Cypress
Montgomery
Conroe

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.