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$65+ 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 2/21. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — HOU
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
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 December 18, 2025.

This CheapOair deal was found by Cheapflights users on 12/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:27 pmISP - IAH
1 stop26h 37mFrontier
Tue 12/309:34 pmIAH - ISP
1 stop18h 03mFrontier
Deal found 12/16$285
This CheapOair deal was found by Cheapflights users on 12/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/176:00 amISP - IAH
1 stop13h 29mFrontier
Wed 12/249:34 pmIAH - ISP
1 stop12h 51mFrontier
Deal found 12/16$305
This Frontier deal was found by Cheapflights users on 12/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/218:35 pmISP - IAH
1 stop11h 46mFrontier
Wed 12/249:34 pmIAH - ISP
1 stop12h 51mFrontier
Deal found 12/15$318
This CheapOair deal was found by Cheapflights users on 12/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:27 pmISP - IAH
1 stop26h 37mFrontier
Fri 1/28:59 amIAH - ISP
1 stop9h 41mFrontier
Deal found 12/16$319
This CheapOair deal was found by Cheapflights users on 12/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:27 pmISP - IAH
1 stop26h 37mFrontier
Sun 1/49:34 pmIAH - ISP
1 stop14h 35mFrontier
Deal found 12/16$334
This CheapOair deal was found by Cheapflights users on 12/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3012:20 pmISP - IAH
1 stop20h 34mFrontier
Wed 1/78:13 pmIAH - ISP
1 stop22h 32mFrontier
Deal found 12/17$343
This CheapOair deal was found by Cheapflights users on 12/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:27 pmISP - IAH
1 stop26h 37mFrontier
Sun 12/289:34 pmIAH - ISP
1 stop14h 35mFrontier
Deal found 12/15$364
This CheapOair deal was found by Cheapflights users on 12/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/298:35 pmISP - IAH
1 stop23h 02mFrontier
Sat 1/38:16 amIAH - ISP
1 stop9h 29mFrontier
Deal found 12/15$394
This Expedia deal was found by Cheapflights users on 12/15. 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.
Tue 12/3012:20 pmISP - IAH
1 stop20h 34mFrontier
Sat 1/38:16 amIAH - ISP
1 stop9h 29mFrontier
Deal found 12/15$397
This CheapOair deal was found by Cheapflights users on 12/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3012:20 pmISP - IAH
1 stop20h 34mFrontier
Mon 1/58:30 amIAH - ISP
1 stop10h 09mFrontier
Deal found 12/16$414
This CheapOair deal was found by Cheapflights users on 12/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/222:04 pmISP - IAH
1 stop29h 33mFrontier
Tue 12/309:34 pmIAH - ISP
1 stop18h 03mFrontier
Deal found 12/16$418
This CheapOair deal was found by Cheapflights users on 12/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/198:35 pmISP - IAH
1 stop11h 36mFrontier
Sat 1/38:16 amIAH - ISP
1 stop9h 29mFrontier
Deal found 12/15$428

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 December 18, 2025.

Most accurate provider

Expedia
2 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$129
(CheapOair)

One-way from

$65
(CheapOair)

Popular in

April

Cheapest in

February

Average price

$239
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. 31% potential increase in price ($155 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 December 18, 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

Wed 2/25

2:03 pm-7:55 am

1 stop18h 52m

Houston George Bush Intcntl

Sat 2/28

8:18 pm-7:48 am

1 stop10h 30m

$129

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 1/8

8:40 pm-11:11 am

1 stop15h 31m

Houston George Bush Intcntl

Sun 1/11

8:13 pm-7:51 pm

1 stop22h 38m

$167

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 2/26

3:34 pm-6:28 pm

1 stop27h 54m

Houston George Bush Intcntl

Sun 3/1

12:38 pm-7:38 am

1 stop18h 00m

$237

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 2/27

3:34 pm-6:28 pm

1 stop27h 54m

Houston George Bush Intcntl

Sun 3/1

12:38 pm-2:39 pm

1 stop25h 01m

$253

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Mon 1/26

7:43 pm-9:57 pm

1 stop27h 14m

Houston George Bush Intcntl

Fri 1/30

11:08 am-6:38 pm

1 stop6h 30m

$268

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Mon 1/12

2:01 pm-9:02 pm

1 stop8h 01m

Houston George Bush Intcntl

Mon 1/19

12:41 pm-7:50 pm

1 stop6h 09m

$272

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 12/24

5:27 pm-7:04 pm

1 stop26h 37m

Houston George Bush Intcntl

Thu 1/1

9:34 pm-7:40 pm

1 stop21h 06m

$285

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 1/16

8:54 pm-6:58 pm

1 stop23h 04m

Houston George Bush Intcntl

Fri 1/23

11:08 am-6:38 pm

1 stop6h 30m

$307

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Tue 1/6

12:55 pm-10:01 am

1 stop22h 06m

Houston George Bush Intcntl

Sat 1/10

8:13 pm-7:45 pm

1 stop22h 32m

$313

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 12/21

8:35 pm-7:21 am

1 stop11h 46m

Houston George Bush Intcntl

Wed 12/24

9:34 pm-11:25 am

1 stop12h 51m

$318

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 28 results
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2
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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

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

Currently, October is the cheapest month in which you can book a flight from Islip, New York to Houston (average of $65). Flying from Islip, New York to Houston in December is currently the most expensive (average of $130). 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 December 18, 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.

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 December 18, 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
7.9
Good
4,250 reviews

Crew

8.6

Food

7.0

Overall

7.9

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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
4,250 reviews
Southwest
7.9
Good
4,250 reviews

Crew

8.6

Food

7.0

Overall

7.9

Comfort

8.0

Boarding

8.1

Entertainment

7.5

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 6h. Fly via Frontier or Southwest to get the fastest option. There are 1462 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 $343, 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.

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

    Currently, October is the cheapest month in which you can book a flight from Islip, New York to Houston (average of $65). Flying from Islip, New York to Houston in December is currently the most expensive (average of $130). 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$343Average$446FlexibilityNo cancel feeOn-time63%

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