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George Bush Intcntl

$134+ Cheap flights from Islip (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 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — IAH
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$191
(Frontier)

One-way from

$134
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$228
From Islip Long Island to Houston George Bush Intcntl
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One-way flight from Islip Long Island to Houston George Bush Intcntl
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Highest demand for flights based on searches. 5% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This Frontier deal was found by Cheapflights users on 9/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/199:47 pmISP - IAH
1 stop10h 17mFrontier
Tue 10/218:05 amIAH - ISP
2 stops11h 37mFrontier
Deal found 9/11$191
This Gotogate deal was found by Cheapflights users on 9/8. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/219:49 amISP - IAH
1 stop7h 20mFrontier
Wed 9/2410:30 amIAH - ISP
2 stops45h 34mFrontier
Deal found 9/8$235
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Fri 10/104:58 pmISP - IAH
1 stop18h 49mFrontier
Fri 10/178:37 pmIAH - ISP
1 stop13h 00mFrontier
Deal found 9/10$262
This Frontier deal was found by Cheapflights users on 9/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/219:49 amISP - IAH
1 stop7h 20mFrontier
Thu 9/259:10 pmIAH - ISP
1 stop10h 54mFrontier
Deal found 9/9$293
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Fri 10/104:58 pmISP - IAH
1 stop16h 35mMultiple Airlines
Fri 10/1712:59 pmIAH - ISP
2 stops20h 38mMultiple Airlines
Deal found 9/10$309
This Frontier deal was found by Cheapflights users on 9/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/169:37 pmISP - IAH
1 stop10h 27mFrontier
Fri 10/178:37 pmIAH - ISP
1 stop13h 00mFrontier
Deal found 9/9$316
This Gotogate deal was found by Cheapflights users on 9/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/135:18 pmISP - IAH
1 stop23h 51mFrontier
Sun 9/2111:44 amIAH - ISP
1 stop21h 56mFrontier
Deal found 9/10$324

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 September 11, 2025.
Use the filters below to find and compare flights from Islip to Houston George Bush Intcntl Airport that are best for you.

Fly from

Islip

Fly to

George Bush Intcntl

Route

Depart

Return

Price

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 10/19

9:47 pm-7:04 am

1 stop10h 17m

Houston George Bush Intcntl

Tue 10/21

8:05 am-8:42 pm

2 stops11h 37m

$191

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 9/21

9:49 am-4:09 pm

1 stop7h 20m

Houston George Bush Intcntl

Wed 9/24

10:30 am-9:04 am

2 stops45h 34m

$235

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 10/10

4:58 pm-10:47 am

1 stop18h 49m

Houston George Bush Intcntl

Fri 10/17

8:37 pm-10:37 am

1 stop13h 00m

$262

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 9/21

9:49 am-4:09 pm

1 stop7h 20m

Houston George Bush Intcntl

Thu 9/25

9:10 pm-9:04 am

1 stop10h 54m

$293

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 10/10

4:58 pm-8:33 am

1 stop16h 35m

Houston George Bush Intcntl

Fri 10/17

12:59 pm-10:37 am

2 stops20h 38m

$309

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 10/16

9:37 pm-7:04 am

1 stop10h 27m

Houston George Bush Intcntl

Fri 10/17

8:37 pm-10:37 am

1 stop13h 00m

$316

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Mon 10/27

9:49 am-4:43 pm

1 stop7h 54m

Houston George Bush Intcntl

Mon 11/10

10:28 am-7:06 pm

1 stop7h 38m

$326

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 9/19

5:12 pm-10:30 pm

2 stops30h 18m

$134

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 10/5

9:49 am-4:09 pm

1 stop7h 20m

$156

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 9/19

9:49 am-3:39 pm

1 stop6h 50m

$161

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/8

Showing 1-10 of 16 results
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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.

Cheapflights Insights

Everything you need to know about your flight from Islip to Houston George Bush Intcntl Airport

What is the cheapest month to book a flight from Islip to Houston George Bush Intcntl Airport?

Currently, August is the cheapest month in which you can book a flight from Islip to Houston George Bush Intcntl Airport (average of $241). Flying from Islip to Houston George Bush Intcntl Airport in March is currently the most expensive (average of $339). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 to Houston George Bush Intcntl Airport?

    A quick flight from Islip to Houston George Bush Intcntl Airport can take about 10h 17m. Frontier provides one of the quickest options available for as low as $191. The distance from Islip to 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.

  • What is the cheapest month to book a flight from Islip to Houston George Bush Intcntl Airport?

    Currently, August is the cheapest month in which you can book a flight from Islip to Houston George Bush Intcntl Airport (average of $241). Flying from Islip to Houston George Bush Intcntl Airport in March is currently the most expensive (average of $339). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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
Montgomery
Spring
Jersey Village
Humble
The Woodlands
Conroe
Tomball
Katy
Cypress

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