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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 1/25. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — HOU
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
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 4, 2025.

This Frontier deal was found by Cheapflights users on 12/2. 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 12/106:00 amISP - IAH
1 stop13h 29mFrontier
Mon 12/229:34 pmIAH - ISP
1 stop12h 51mFrontier
Deal found 12/2$182
This CheapOair deal was found by Cheapflights users on 12/3. 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 12/106:00 amISP - IAH
1 stop26h 54mFrontier
Tue 12/168:07 pmIAH - ISP
1 stop27h 31mFrontier
Deal found 12/3$183
This Mytrip deal was found by Cheapflights users on 12/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/168:29 pmISP - IAH
1 stop23h 00mFrontier
Wed 12/249:34 pmIAH - ISP
1 stop12h 51mFrontier
Deal found 12/2$192
This CheapOair deal was found by Cheapflights users on 12/2. 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 12/98:29 pmISP - IAH
1 stop23h 00mFrontier
Thu 12/118:07 pmIAH - ISP
1 stop22h 27mFrontier
Deal found 12/2$204
This CheapOair deal was found by Cheapflights users on 12/2. 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 12/106:00 amISP - IAH
1 stop13h 29mFrontier
Sun 12/148:01 amIAH - ISP
1 stop24h 12mFrontier
Deal found 12/2$208
This CheapOair deal was found by Cheapflights users on 12/2. 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 12/1812:20 pmISP - IAH
1 stop20h 44mFrontier
Sun 12/219:34 pmIAH - ISP
1 stop21h 06mFrontier
Deal found 12/2$209
This Kiwi.com deal was found by Cheapflights users on 12/3. 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.
Wed 12/315:27 pmISP - IAH
1 stop16h 52mMultiple Airlines
Thu 1/85:14 pmIAH - ISP
1 stop19h 07mMultiple Airlines
Deal found 12/3$225
This Frontier deal was found by Cheapflights users on 12/2. 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.
Thu 12/1110:19 amISP - IAH
1 stop9h 10mFrontier
Sun 12/148:07 pmIAH - ISP
1 stop12h 06mFrontier
Deal found 12/2$228
This CheapOair deal was found by Cheapflights users on 12/1. 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 12/1110:19 amISP - IAH
1 stop9h 10mFrontier
Sat 12/138:07 pmIAH - ISP
1 stop13h 13mFrontier
Deal found 12/1$229
This CheapOair deal was found by Cheapflights users on 12/2. 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 12/1310:19 amISP - IAH
1 stop21h 47mFrontier
Mon 12/158:07 pmIAH - ISP
1 stop22h 27mFrontier
Deal found 12/2$233
This CheapOair deal was found by Cheapflights users on 12/3. 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 12/106:00 amISP - IAH
1 stop26h 54mFrontier
Wed 12/178:07 pmIAH - ISP
1 stop14h 18mFrontier
Deal found 12/3$234
This CheapOair deal was found by Cheapflights users on 12/3. 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 12/168:29 pmISP - IAH
1 stop23h 00mFrontier
Sat 12/209:34 pmIAH - ISP
1 stop21h 06mFrontier
Deal found 12/3$235

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 4, 2025.

Most accurate provider

Expedia
2 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$162
(Kiwi.com)

One-way from

$65
(CheapOair)

Popular in

March

Cheapest in

February

Average price

$357
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. 19% potential increase in price ($85 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% 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 4, 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

Tue 1/6

12:00 pm-11:45 am

1 stop24h 45m

Houston George Bush Intcntl

Tue 1/13

7:45 am-10:46 pm

2 stops14h 01m

$183

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 1/22

7:43 pm-5:10 pm

1 stop22h 27m

Houston George Bush Intcntl

Sun 1/25

6:18 pm-1:21 pm

2 stops18h 03m

$188

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Tue 12/16

8:29 pm-6:29 pm

1 stop23h 00m

Houston George Bush Intcntl

Wed 12/24

9:34 pm-11:25 am

1 stop12h 51m

$192

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 1/9

2:01 pm-9:02 pm

1 stop8h 01m

Houston George Bush Intcntl

Sun 1/11

8:13 pm-7:51 pm

1 stop22h 38m

$192

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 1/22

7:43 pm-9:00 am

1 stop14h 17m

Houston George Bush Intcntl

Sun 1/25

6:18 pm-6:48 pm

1 stop23h 30m

$199

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 3/5

10:42 am-7:54 am

1 stop22h 12m

Houston George Bush Intcntl

Mon 3/9

9:07 am-11:59 pm

1 stop13h 52m

$204

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Mon 12/15

10:19 am-6:29 pm

1 stop9h 10m

Houston George Bush Intcntl

Tue 12/16

8:07 pm-10:44 pm

1 stop25h 37m

$208

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 2/19

10:42 am-8:48 pm

1 stop11h 06m

Houston George Bush Intcntl

Tue 2/24

4:20 pm-10:40 am

1 stop17h 20m

$209

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Wed 1/14

12:40 pm-7:40 pm

2 stops8h 00m

Houston Hobby

Mon 1/19

3:00 pm-10:20 pm

2 stops6h 20m

$257

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Fri 1/30

12:40 pm-7:40 pm

2 stops8h 00m

Houston Hobby

Mon 2/2

6:00 am-11:55 am

1 stop4h 55m

$272

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/4

Showing 1-10 of 25 results
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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 $120). 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 4, 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 December 4, 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
4,250 reviews

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Crew

8.6

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
4,250 reviews
Southwest
8.0
Very good
4,250 reviews

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Crew

8.6

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. 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.. Southwest is currently priced 4% 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 $120). 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 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$343Average$406FlexibilityNo cancel feeOn-time63%

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