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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 2/28. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — HOU
Feb 19 — Feb 261
Thu 2/19
Thu 2/26
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 January 20, 2026.

This CheapOair deal was found by Cheapflights users on 1/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/2111:41 am
ISP
-
IAH
1 stop21h 14m
Frontier
Sat 2/2811:12 am
IAH
-
ISP
1 stop19h 36m
Frontier
Deal found 1/20$129
This Kiwi.com deal was found by Cheapflights users on 1/18. 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.
Thu 2/193:34 pm
ISP
-
IAH
1 stop27h 54m
Multiple Airlines
Thu 2/269:40 pm
IAH
-
ISP
1 stop8h 58m
Multiple Airlines
Deal found 1/18$183
This CheapOair deal was found by Cheapflights users on 1/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/69:43 pm
ISP
-
IAH
1 stop12h 17m
Frontier
Wed 2/117:59 pm
IAH
-
ISP
1 stop17h 40m
Frontier
Deal found 1/19$190
This CheapOair deal was found by Cheapflights users on 1/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/27:43 pm
ISP
-
IAH
1 stop27h 14m
Frontier
Thu 2/58:18 pm
IAH
-
ISP
1 stop23h 29m
Frontier
Deal found 1/20$201
This Frontier deal was found by Cheapflights users on 1/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/228:21 pm
ISP
-
IAH
1 stop11h 39m
Frontier
Thu 2/268:18 pm
IAH
-
ISP
1 stop10h 20m
Frontier
Deal found 1/18$215
This CheapOair deal was found by Cheapflights users on 1/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/193:34 pm
ISP
-
IAH
1 stop27h 54m
Frontier
Thu 2/268:18 pm
IAH
-
ISP
1 stop17h 21m
Frontier
Deal found 1/19$242
This CheapOair deal was found by Cheapflights users on 1/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/273:34 pm
ISP
-
IAH
1 stop19h 43m
Frontier
Sun 3/18:18 pm
IAH
-
ISP
1 stop10h 20m
Frontier
Deal found 1/19$251
This CheapOair deal was found by Cheapflights users on 1/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/267:43 pm
ISP
-
IAH
1 stop27h 14m
Frontier
Thu 1/298:18 pm
IAH
-
ISP
1 stop23h 29m
Frontier
Deal found 1/20$262
This Booking.com deal was found by Cheapflights users on 1/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/309:43 pm
ISP
-
IAH
1 stop12h 17m
Frontier
Thu 2/58:18 pm
IAH
-
ISP
1 stop23h 29m
Frontier
Deal found 1/18$268
This Booking.com deal was found by Cheapflights users on 1/19. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/263:34 pm
ISP
-
IAH
1 stop27h 54m
Frontier
Mon 3/27:45 am
IAH
-
ISP
1 stop5h 54m
Frontier
Deal found 1/19$274
This Frontier deal was found by Cheapflights users on 1/20. 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.
Wed 2/259:33 am
ISP
-
IAH
1 stop10h 31m
Frontier
Sun 3/18:18 pm
IAH
-
ISP
1 stop10h 20m
Frontier
Deal found 1/20$276
This Southwest deal was found by Cheapflights users on 1/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/236:00 am
ISP
-
HOU
2 stops8h 45m
Southwest
Tue 6/237:20 pm
HOU
-
ISP
1 stop11h 45m
Southwest
Deal found 1/19$356

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 January 20, 2026.

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

$215
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 January 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 January 20, 2026.
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

Sat 2/21

11:41 am-7:55 am

1 stop21h 14m

Houston George Bush Intcntl

Sat 2/28

11:12 am-7:48 am

1 stop19h 36m

$129

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 2/19

3:34 pm-6:28 pm

1 stop27h 54m

Houston George Bush Intcntl

Thu 2/26

9:40 pm-7:38 am

1 stop8h 58m

$183

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Mon 2/2

7:43 pm-9:57 pm

1 stop27h 14m

Houston George Bush Intcntl

Thu 2/5

8:18 pm-8:47 pm

1 stop23h 29m

$201

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 2/22

8:21 pm-7:00 am

1 stop11h 39m

Houston George Bush Intcntl

Thu 2/26

8:18 pm-7:38 am

1 stop10h 20m

$215

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 2/19

3:34 pm-6:28 pm

1 stop27h 54m

Houston George Bush Intcntl

Thu 2/26

8:18 pm-2:39 pm

1 stop17h 21m

$242

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 2/27

3:34 pm-10:17 am

1 stop19h 43m

Houston George Bush Intcntl

Sun 3/1

8:18 pm-7:38 am

1 stop10h 20m

$251

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 3/20

1:42 pm-7:29 am

1 stop18h 47m

Houston George Bush Intcntl

Wed 3/25

9:15 pm-4:13 pm

1 stop17h 58m

$276

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 2/26

3:34 pm-10:41 pm

1 stop8h 07m

Houston George Bush Intcntl

Mon 3/2

9:40 pm-11:10 am

2 stops36h 30m

$301

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 2/1

7:53 pm-10:13 am

1 stop15h 20m

Houston George Bush Intcntl

Fri 2/6

11:08 am-6:38 pm

1 stop6h 30m

$310

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Mon 2/2

7:43 pm-9:57 pm

1 stop27h 14m

Houston George Bush Intcntl

Mon 2/16

7:45 am-2:39 pm

1 stop5h 54m

$312

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Showing 1-10 of 26 results
1
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.

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 January 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
8.0
Very good
4,267 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

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
4,267 reviews
Southwest
8.0
Very good
4,267 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

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 8h 45m. 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 $266, was found to be the cheapest airline from Islip, New York to Houston.. Southwest is currently priced 21% 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, 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

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 January 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$266Average$446FlexibilityNo cancel feeOn-time63%

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