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$145+ Cheap flights from Islip, NY (ISP) to Houston

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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — HOU
Jul 20 — Jul 271
Mon 7/20
Mon 7/27
1 adult, Economy
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Cheap flight deals from Islip to Houston

Cheapest flights from Islip to Houston
Explore the most affordable flight options available from Islip to Houston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 20, 2026.

This Kiwi.com deal was found by Cheapflights users on 6/18. 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 8/212:28 pm
ISP
-
IAH
2 stops18h 34m
Multiple Airlines
Mon 8/245:09 pm
IAH
-
ISP
1 stop22h 38m
Multiple Airlines
Deal found 6/18$313
This Southwest deal was found by Cheapflights users on 6/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/96:00 pm
ISP
-
HOU
2 stops7h 50m
Southwest
Wed 7/151:45 pm
HOU
-
ISP
2 stops7h 55m
Southwest
Deal found 6/17$339
This JetBlue deal was found by Cheapflights users on 6/19. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/156:00 am
ISP
-
IAH
1 stop10h 47m
JetBlue
Wed 7/221:00 pm
IAH
-
ISP
1 stop7h 44m
JetBlue
Deal found 6/19$345
This Kiwi.com deal was found by Cheapflights users on 6/18. 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 8/27:49 pm
ISP
-
IAH
2 stops36h 31m
Multiple Airlines
Thu 8/67:23 pm
IAH
-
ISP
1 stop13h 30m
Multiple Airlines
Deal found 6/18$352
This Southwest deal was found by Cheapflights users on 6/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/76:10 am
ISP
-
HOU
2 stops8h 50m
Southwest
Sun 8/95:15 am
HOU
-
ISP
1 stop9h 40m
Southwest
Deal found 6/18$352
This JetBlue deal was found by Cheapflights users on 6/19. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/156:00 am
ISP
-
IAH
1 stop10h 47m
JetBlue
Thu 7/231:00 pm
IAH
-
ISP
1 stop7h 44m
JetBlue
Deal found 6/19$364
This JetBlue deal was found by Cheapflights users on 6/18. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:00 pm
ISP
-
IAH
1 stop7h 02m
JetBlue
Wed 9/21:00 pm
IAH
-
ISP
1 stop7h 34m
JetBlue
Deal found 6/18$379
This JetBlue deal was found by Cheapflights users on 6/19. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/166:00 am
ISP
-
IAH
1 stop10h 47m
JetBlue
Mon 7/271:00 pm
IAH
-
ISP
1 stop7h 44m
JetBlue
Deal found 6/19$383
This JetBlue deal was found by Cheapflights users on 6/16. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:00 am
ISP
-
IAH
1 stop10h 47m
JetBlue
Thu 7/161:00 pm
IAH
-
ISP
1 stop7h 44m
JetBlue
Deal found 6/16$384
This JetBlue deal was found by Cheapflights users on 6/19. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/206:00 am
ISP
-
IAH
1 stop6h 47m
JetBlue
Tue 7/281:00 pm
IAH
-
ISP
1 stop7h 44m
JetBlue
Deal found 6/19$386
This JetBlue deal was found by Cheapflights users on 6/19. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/216:00 am
ISP
-
IAH
1 stop6h 47m
JetBlue
Sat 7/251:00 pm
IAH
-
ISP
1 stop7h 44m
JetBlue
Deal found 6/19$389
This Expedia deal was found by Cheapflights users on 6/15. 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.
Fri 6/269:52 pm
ISP
-
IAH
1 stop21h 37m
Frontier
Mon 6/291:07 pm
IAH
-
ISP
1 stop6h 50m
Frontier
Deal found 6/15$400

Find flight deals from Islip to Houston

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Houston (HO1). 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 June 20, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$313
(Kiwi.com)

One-way from

$145
(Booking.com)

Popular in

March

Cheapest in

January

Average price

$311
Provider with most accurate pricing for New York (NYC)-Houston flight deals.
Search Deals
Provider most trusted by Cheapflights users for New York (NYC)-Houston flights.
Search Deals
From Islip Long Island to Houston
Search Deals
One-way flight from Islip Long Island to Houston
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($9 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Houston 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 June 20, 2026.
Use the filters below to find and compare flights from Islip to Houston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Thu 7/9

6:00 pm-12:10 am

2 stops7h 10m

Houston Hobby

Wed 7/15

8:10 pm-8:20 am

1 stop11h 10m

$339

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Tue 9/1

5:00 pm-11:02 pm

1 stop7h 02m

Houston George Bush Intcntl

Wed 9/2

1:00 pm-9:34 pm

1 stop7h 34m

$345

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Tue 7/21

6:00 am-3:47 pm

1 stop10h 47m

Houston George Bush Intcntl

Tue 7/28

1:00 pm-9:44 pm

1 stop7h 44m

$345
Quickest round-trip

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 7/15

6:00 am-11:47 am

1 stop6h 47m

Houston George Bush Intcntl

Sat 7/18

1:00 pm-9:44 pm

1 stop7h 44m

$345

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Fri 8/7

5:00 pm-10:20 pm

1 stop6h 20m

Houston Hobby

Sun 8/9

5:15 am-3:55 pm

1 stop9h 40m

$358

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Tue 7/21

4:40 pm-11:45 pm

2 stops8h 05m

Houston Hobby

Thu 7/23

8:35 pm-8:20 am

1 stop10h 45m

$376

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 7/16

6:00 am-3:47 pm

1 stop10h 47m

Houston George Bush Intcntl

Mon 7/27

1:00 pm-9:44 pm

1 stop7h 44m

$383

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Tue 7/21

4:58 pm-11:02 pm

1 stop7h 04m

Houston George Bush Intcntl

Sat 7/25

1:00 pm-9:44 pm

1 stop7h 44m

$384

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Mon 7/20

6:00 am-3:47 pm

1 stop10h 47m

Houston George Bush Intcntl

Tue 7/21

1:00 pm-9:44 pm

1 stop7h 44m

$386

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 7/9

4:58 pm-11:02 pm

1 stop7h 04m

Houston George Bush Intcntl

Mon 7/13

1:00 pm-9:44 pm

1 stop7h 44m

$405

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/16

Showing 1-10 of 27 resultsSorted by cheapest first
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Best time to book a flight from Islip to Houston

Have a flexible travel schedule? Discover the best time to fly to Houston 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
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Houston

Get insights into the airlines that provide service to Houston. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Houston. Reviews last updated June 20, 2026.
Get a feel of what it's like to fly with Southwest from Islip to Houston by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,241 reviews

Food

7.0

Crew

8.6

Overall

7.9

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
7.9
Good
4,241 reviews
Southwest
7.9
Good
4,241 reviews

Food

7.0

Crew

8.6

Overall

7.9

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from Islip to Houston. 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?

    For a flight from Islip to Houston, you will be flying from Long Island. Islip Long Island (ISP) is just 7.2 mi from the center of the city. Long Island is the only Islip airport and it handles 0 outbound flights to Houston per day. 1 airline has flights to Houston from Islip Long Island on a regular basis.

  • How long is the flight from Islip, New York to Houston?

    There are many flights that can get you from Islip, New York to Houston in 7h 02m. Fly via Southwest or JetBlue to get the fastest option. There are 1451 mi between Islip, New York and Houston. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Islip, New York to Houston round-trip?

    Southwest, at $266, was found to be the cheapest airline from Islip, New York to Houston..

  • Can I find deals for flights from Islip to Houston that include hotel bookings?

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

  • How can I find direct flights from Islip to Houston?

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

  • Can I find deals for business class flights from Islip to Houston?

    Yes. Cheapflights offers flight deals from Islip to Houston 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Islip to Houston

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Islip to Houston

Discover the top airline that operate flights from Islip to Houston. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$266Average$474FlexibilityNo cancel feeOn-time63%

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