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$86+ 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 4/10. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — HOU
Apr 21 — Apr 281
Tue 4/21
Tue 4/28
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 March 22, 2026.

This Frontier deal was found by Cheapflights users on 3/20. 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.
Sat 4/115:45 am
ISP
-
IAH
1 stop10h 29m
Frontier
Thu 4/237:55 pm
IAH
-
ISP
1 stop12h 18m
Frontier
Deal found 3/20$185
This CheapOair deal was found by Cheapflights users on 3/17. 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.
Fri 4/244:07 pm
ISP
-
IAH
1 stop17h 31m
Frontier
Sun 4/265:12 pm
IAH
-
ISP
1 stop15h 16m
Frontier
Deal found 3/17$210
This Frontier deal was found by Cheapflights users on 3/20. 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.
Sun 4/127:59 pm
ISP
-
IAH
1 stop12h 03m
Frontier
Thu 4/237:55 pm
IAH
-
ISP
1 stop12h 18m
Frontier
Deal found 3/20$230
This Frontier deal was found by Cheapflights users on 3/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/127:59 pm
ISP
-
IAH
1 stop12h 03m
Frontier
Thu 4/167:55 pm
IAH
-
ISP
1 stop12h 18m
Frontier
Deal found 3/17$250
This CheapOair deal was found by Cheapflights users on 3/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/2810:43 am
ISP
-
IAH
1 stop10h 25m
Frontier
Sun 4/51:17 pm
IAH
-
ISP
1 stop19h 11m
Frontier
Deal found 3/21$280
This CheapOair deal was found by Cheapflights users on 3/19. 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.
Sun 4/198:31 pm
ISP
-
IAH
1 stop20h 31m
Frontier
Sun 4/268:06 pm
IAH
-
ISP
1 stop12h 22m
Frontier
Deal found 3/19$290
This Frontier deal was found by Cheapflights users on 3/20. 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.
Sat 4/115:45 am
ISP
-
IAH
1 stop10h 29m
Frontier
Sun 4/197:46 pm
IAH
-
ISP
1 stop12h 27m
Frontier
Deal found 3/20$320
This Kiwi.com deal was found by Cheapflights users on 3/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/2311:57 am
ISP
-
IAH
2 stops21h 53m
Multiple Airlines
Fri 5/291:58 pm
IAH
-
ISP
1 stop19h 07m
Multiple Airlines
Deal found 3/17$322
This Southwest deal was found by Cheapflights users on 3/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/53:05 pm
ISP
-
HOU
1 stop8h 10m
Southwest
Mon 6/85:25 am
HOU
-
ISP
1 stop5h 25m
Southwest
Deal found 3/20$322
This Kiwi.com deal was found by Cheapflights users on 3/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/511:00 am
ISP
-
IAH
1 stop8h 49m
Frontier
Mon 6/88:50 pm
IAH
-
ISP
2 stops18h 06m
Frontier
Deal found 3/20$324
This Expedia deal was found by Cheapflights users on 3/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2011:00 am
ISP
-
IAH
1 stop22h 50m
Frontier
Sun 5/247:44 pm
IAH
-
ISP
1 stop13h 21m
Frontier
Deal found 3/20$335
This Frontier deal was found by Cheapflights users on 3/21. 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 4/57:59 pm
ISP
-
IAH
1 stop12h 03m
Frontier
Thu 4/912:14 pm
IAH
-
ISP
1 stop12h 12m
Frontier
Deal found 3/21$336

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 March 22, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$185
(Frontier)

One-way from

$86
(Expedia)

Popular in

March

Cheapest in

February

Average price

$446
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. 6% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 22, 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 - IAH

ISPIAH

Islip Long Island

Fri 4/24

4:07 pm-8:38 am

1 stop17h 31m

Houston George Bush Intcntl

Sun 4/26

5:12 pm-9:28 am

1 stop15h 16m

$210

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 4/12

7:59 pm-7:02 am

1 stop12h 03m

Houston George Bush Intcntl

Thu 4/16

7:55 pm-9:13 am

1 stop12h 18m

$250

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 3/28

10:43 am-8:08 pm

1 stop10h 25m

Houston George Bush Intcntl

Sun 4/5

1:17 pm-9:28 am

1 stop19h 11m

$280

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 4/19

8:31 pm-4:02 pm

1 stop20h 31m

Houston George Bush Intcntl

Sun 4/26

8:06 pm-9:28 am

1 stop12h 22m

$290

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 5/20

11:00 am-8:50 am

1 stop22h 50m

Houston George Bush Intcntl

Sun 5/24

7:44 pm-10:05 am

1 stop13h 21m

$335

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 4/5

7:59 pm-7:02 am

1 stop12h 03m

Houston George Bush Intcntl

Thu 4/9

12:14 pm-1:26 am

1 stop12h 12m

$336
Quickest round-trip

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Sat 5/23

4:40 pm-9:40 pm

1 stop6h 00m

Houston Hobby

Fri 5/29

5:30 am-11:50 am

1 stop5h 20m

$341

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 4/4

11:15 am-8:20 pm

1 stop10h 05m

Houston George Bush Intcntl

Sun 4/5

1:17 pm-9:28 am

1 stop19h 11m

$360

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 4/2

8:36 pm-7:02 am

1 stop11h 26m

Houston George Bush Intcntl

Mon 4/6

8:02 am-5:55 pm

1 stop8h 53m

$385

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 3/28

10:43 am-8:08 pm

1 stop10h 25m

Houston George Bush Intcntl

Tue 3/31

9:15 pm-7:59 pm

1 stop21h 44m

$416

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/17

Showing 1-10 of 28 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

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 March 22, 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
4,324 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

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
4,324 reviews
Southwest
8.0
Very good
4,324 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

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 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 $266, was found to be the cheapest airline from Islip, New York to Houston.. Southwest is currently priced 10% 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 March 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$266Average$361FlexibilityNo cancel feeOn-time63%

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