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$109+ Cheap flights from George Bush Intcntl (IAH) to Islip (ISP)

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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — ISP
Sep 2 — Sep 91
Tue 9/2
Tue 9/9
1 adult, Economy
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Cheap flight deals from George Bush Intcntl to Islip

Discover tips and strategies to find the most affordable flight options for your journey from George Bush Intcntl (IAH) to Islip (ISP). 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 August 28, 2025.

Round-trip from

$191
(Frontier)

One-way from

$109
(Cheapflightsfares)

Popular in

December

Cheapest in

September

Average price

$277
From Houston George Bush Intcntl to Islip Long Island
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One-way flight from Houston George Bush Intcntl to Islip Long Island
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Highest demand for flights based on searches. 5% potential increase in price ($13 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from George Bush Intcntl to Islip

Cheapest flights from George Bush Intcntl to Islip
Explore the most affordable flight options available from George Bush Intcntl to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 28, 2025.

This Kiwi.com deal was found by Cheapflights users on 8/27. 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.
Sun 9/285:30 amIAH - ISP
1 stop28h 10mMultiple Airlines
Tue 9/3011:25 amISP - IAH
1 stop21h 59mMultiple Airlines
Deal found 8/27$232
This FlightHub deal was found by Cheapflights users on 8/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/296:32 pmIAH - ISP
1 stop18h 27mFrontier
Tue 9/911:25 amISP - IAH
1 stop29h 11mFrontier
Deal found 8/26$289
This Cheapflightsfares deal was found by Cheapflights users on 8/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/24:43 pmIAH - ISP
1 stop6h 16mFrontier
Fri 9/59:49 amISP - IAH
1 stop6h 50mFrontier
Deal found 8/27$290
This FlightHub deal was found by Cheapflights users on 8/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/296:32 pmIAH - ISP
1 stop20h 39mFrontier
Mon 9/85:05 pmISP - IAH
1 stop23h 31mFrontier
Deal found 8/26$294
This Cheapflightsfares deal was found by Cheapflights users on 8/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/410:28 amIAH - ISP
1 stop6h 14mFrontier
Sun 11/98:49 amISP - IAH
1 stop6h 47mFrontier
Deal found 8/26$306
This Frontier deal was found by Cheapflights users on 8/25. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/108:37 pmIAH - ISP
1 stop13h 00mFrontier
Mon 10/139:49 amISP - IAH
1 stop7h 54mFrontier
Deal found 8/25$307
This Frontier deal was found by Cheapflights users on 8/27. 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 9/119:10 pmIAH - ISP
1 stop10h 54mFrontier
Sun 9/149:49 amISP - IAH
1 stop7h 20mFrontier
Deal found 8/27$312
This Cheapflightsfares deal was found by Cheapflights users on 8/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/24:43 pmIAH - ISP
1 stop6h 16mFrontier
Fri 9/129:49 amISP - IAH
1 stop6h 55mFrontier
Deal found 8/26$314
This Frontier deal was found by Cheapflights users on 8/28. 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 12/117:08 pmIAH - ISP
1 stop13h 03mFrontier
Sun 12/148:01 pmISP - IAH
1 stop12h 39mFrontier
Deal found 8/28$316
This FlightHub deal was found by Cheapflights users on 8/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/296:32 pmIAH - ISP
1 stop18h 27mFrontier
Tue 9/26:05 amISP - IAH
1 stop10h 35mFrontier
Deal found 8/26$330

Cheapflights Fare Finder

 
Customize your flight search to find flights from George Bush Intcntl to Islip 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 August 28, 2025.
Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to Islip that are best for you.

Fly from

George Bush Intcntl

Fly to

Islip

Route

Depart

Return

Price

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Sun 9/28

5:30 am-10:40 am

1 stop28h 10m

Islip Long Island

Tue 9/30

11:25 am-8:24 am

1 stop21h 59m

$232

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Tue 9/2

4:43 pm-11:59 pm

1 stop6h 16m

Islip Long Island

Fri 9/5

9:49 am-3:39 pm

1 stop6h 50m

$290

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Tue 11/4

10:28 am-5:42 pm

1 stop6h 14m

Islip Long Island

Sun 11/9

8:49 am-2:36 pm

1 stop6h 47m

$306

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Fri 10/10

8:37 pm-10:37 am

1 stop13h 00m

Islip Long Island

Mon 10/13

9:49 am-4:43 pm

1 stop7h 54m

$307

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Thu 9/11

9:10 pm-9:04 am

1 stop10h 54m

Islip Long Island

Sun 9/14

9:49 am-4:09 pm

1 stop7h 20m

$312

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Tue 9/2

4:43 pm-11:59 pm

1 stop6h 16m

Islip Long Island

Fri 9/12

9:49 am-3:44 pm

1 stop6h 55m

$314

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Thu 10/16

8:37 pm-10:37 am

1 stop13h 00m

Islip Long Island

Mon 10/20

9:49 am-4:43 pm

1 stop7h 54m

$316

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Fri 10/31

5:56 pm-10:37 am

2 stops15h 41m

Islip Long Island

Sun 11/2

9:27 pm-9:33 am

1 stop13h 06m

$346

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Tue 10/28

10:28 am-5:42 pm

1 stop6h 14m

$109

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Tue 11/4

10:28 am-5:42 pm

1 stop6h 14m

$145

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/26

Showing 1-10 of 15 results
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Best time to book a flight from George Bush Intcntl to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from George Bush Intcntl 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 Houston George Bush Intcntl Airport to Islip

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

Currently, January is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Islip (average of $108). Flying from Houston George Bush Intcntl Airport to Islip in November is currently the most expensive (average of $213). 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 George Bush Intcntl to Islip. 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 into for flights to Islip from Houston George Bush Intcntl?

    Located just 7.2 mi from the city center, Islip Long Island is the airport most travelers will use when flying to Islip from Houston George Bush Intcntl. Booking flights from Houston George Bush Intcntl to Long Island (ISP) should be relatively easy as there are 0 daily inbound flights from Houston George Bush Intcntl from 0 different airlines.

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

    Departing from Houston George Bush Intcntl Airport to Islip will take you 6h 16m. The distance from Houston George Bush Intcntl Airport to Islip is about 1451 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from George Bush Intcntl to Islip 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 Houston George Bush Intcntl Airport to Islip?

    Currently, January is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Islip (average of $108). Flying from Houston George Bush Intcntl Airport to Islip in November is currently the most expensive (average of $213). 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

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