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$85+ 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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — HOU
Nov 21 — Nov 281
Fri 11/21
Fri 11/28
1 adult, Economy
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Find 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 October 22, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/21. 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 11/174:58 pmISP - IAH
1 stop17h 35mFrontier
Thu 11/202:36 pmIAH - ISP
1 stop19h 01mFrontier
Deal found 10/21$169
This Kiwi.com deal was found by Cheapflights users on 10/21. 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 11/174:58 pmISP - IAH
2 stops15h 46mMultiple Airlines
Thu 11/202:36 pmIAH - ISP
1 stop19h 01mMultiple Airlines
Deal found 10/21$199
This Frontier deal was found by Cheapflights users on 10/21. 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 11/168:49 amISP - IAH
1 stop6h 47mFrontier
Tue 11/1810:28 amIAH - ISP
1 stop6h 14mFrontier
Deal found 10/21$239
This Frontier deal was found by Cheapflights users on 10/20. 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 10/249:49 amISP - IAH
1 stop7h 54mFrontier
Tue 10/2810:28 amIAH - ISP
1 stop6h 14mFrontier
Deal found 10/20$251
This Frontier deal was found by Cheapflights users on 10/21. 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 10/249:49 amISP - IAH
1 stop7h 54mFrontier
Sun 10/268:37 pmIAH - ISP
1 stop13h 00mFrontier
Deal found 10/21$268
This Kiwi.com deal was found by Cheapflights users on 10/21. 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 10/306:37 pmISP - IAH
1 stop14h 56mMultiple Airlines
Thu 11/66:06 amIAH - ISP
2 stops10h 36mMultiple Airlines
Deal found 10/21$277
This Kiwi.com deal was found by Cheapflights users on 10/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/239:37 pmISP - IAH
1 stop10h 27mMultiple Airlines
Sat 10/258:37 pmIAH - ISP
2 stops21h 19mMultiple Airlines
Deal found 10/19$442
This Frontier deal was found by Cheapflights users on 10/21. 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.
Mon 11/249:02 amISP - IAH
1 stop8h 48mFrontier
Sun 11/308:25 pmIAH - ISP
1 stop10h 37mFrontier
Deal found 10/21$447
This Southwest deal was found by Cheapflights users on 10/21. 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 10/3012:35 pmISP - HOU
1 stop8h 20mSouthwest
Thu 11/62:45 pmHOU - ISP
1 stop8h 05mSouthwest
Deal found 10/21$611
This Frontier deal was found by Cheapflights users on 10/21. 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 11/2811:32 amISP - IAH
1 stop6h 39mFrontier
Sun 11/308:25 pmIAH - ISP
1 stop10h 37mFrontier
Deal found 10/21$621

Cheap 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 October 22, 2025.

Most accurate provider

Expedia
2 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$169
(Kiwi.com)

One-way from

$85
(Frontier)

Popular in

April

Cheapest in

November

Average price

$356
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. 29% potential increase in price ($175 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease ($42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 22, 2025.
Use the filters below to find and compare flights from Islip to Houston that are best for you.

Fly from

Islip

Fly to

Houston

Route

Depart

Return

Price

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Mon 11/17

4:58 pm-9:33 am

1 stop17h 35m

Houston George Bush Intcntl

Thu 11/20

2:36 pm-10:37 am

1 stop19h 01m

$169

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Mon 11/17

4:58 pm-7:44 am

2 stops15h 46m

Houston George Bush Intcntl

Thu 11/20

2:36 pm-10:37 am

1 stop19h 01m

$199

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 10/30

6:37 pm-8:33 am

1 stop14h 56m

Houston George Bush Intcntl

Thu 11/6

6:06 am-5:42 pm

2 stops10h 36m

$277

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Mon 11/24

9:02 am-4:50 pm

1 stop8h 48m

Houston George Bush Intcntl

Sun 11/30

8:25 pm-8:02 am

1 stop10h 37m

$447

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 11/28

11:32 am-5:11 pm

1 stop6h 39m

Houston George Bush Intcntl

Sun 11/30

8:25 pm-8:02 am

1 stop10h 37m

$621

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 12/11

10:19 am-6:29 pm

1 stop9h 10m

Houston George Bush Intcntl

Sat 12/13

8:07 pm-10:20 am

1 stop13h 13m

$679

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 11/23

11:03 am-5:19 pm

1 stop7h 16m

Houston George Bush Intcntl

Sat 11/29

8:08 pm-10:09 am

1 stop13h 01m

$729

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 11/26

11:03 am-4:55 pm

1 stop6h 52m

Houston George Bush Intcntl

Sat 11/29

8:08 pm-10:09 am

1 stop13h 01m

$958

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 12/18

12:20 pm-7:04 pm

1 stop7h 44m

Houston George Bush Intcntl

Sat 1/3

8:16 am-8:07 pm

1 stop10h 51m

$966

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 12/6

10:19 am-6:29 pm

1 stop9h 10m

$85

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/22

Showing 1-10 of 19 results
1
2

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

What is the cheapest month to book a flight from Islip, New York to Houston?

Currently, November is the cheapest month in which you can book a flight from Islip, New York to Houston (average of $71). Flying from Islip, New York to Houston in December is currently the most expensive (average of $121). 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.

What is the cheapest time of day to fly from ISP to HOU?

Find hourly flight availability from Islip to Houston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 22, 2025.

It’s optimal to fly from Islip, New York to Houston in the afternoon. By choosing this option you can save up to 70% on the cost of your flight, compared to a flight in the evening.

How much does it cost to fly round-trip from Islip, New York to Houston?

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 October 22, 2025.
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
8.0
Very good
4,237 reviews

Overall

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

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
8.0
Very good
4,237 reviews
Southwest
8.0
Very good
4,237 reviews

Overall

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

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 17h 35m. Fly via Frontier to get the fastest option. There are 1451 mi between Islip, New York and Houston.

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

    Southwest, at $343, was found to be the cheapest airline from Islip, New York to Houston.. Southwest is currently priced 17% below the average price you’ll pay for this route.

  • 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.

  • What is the cheapest month to book a flight from Islip, New York to Houston?

    Currently, November is the cheapest month in which you can book a flight from Islip, New York to Houston (average of $71). Flying from Islip, New York to Houston in December is currently the most expensive (average of $121). 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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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 October 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$343Average$446FlexibilityNo cancel feeOn-time63%

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