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$95+ 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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — HOU
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
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 10, 2026.

This Frontier deal was found by Cheapflights users on 3/9. 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 4/107:34 pm
ISP
-
IAH
1 stop12h 28m
Frontier
Sat 4/186:57 pm
IAH
-
ISP
1 stop13h 16m
Frontier
Deal found 3/9$190
This Frontier deal was found by Cheapflights users on 3/9. 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 4/118:39 pm
ISP
-
IAH
1 stop12h 59m
Frontier
Sat 4/186:57 pm
IAH
-
ISP
1 stop13h 16m
Frontier
Deal found 3/9$210
This Frontier deal was found by Cheapflights users on 3/8. 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 7/2310:03 am
ISP
-
IAH
1 stop10h 16m
Frontier
Mon 7/278:24 pm
IAH
-
ISP
1 stop11h 44m
Frontier
Deal found 3/8$270
This Frontier deal was found by Cheapflights users on 3/9. 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 5/2110:03 am
ISP
-
IAH
1 stop10h 16m
Frontier
Tue 5/268:24 pm
IAH
-
ISP
1 stop11h 44m
Frontier
Deal found 3/9$290
This Expedia deal was found by Cheapflights users on 3/5. 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.
Fri 3/271:42 pm
ISP
-
IAH
1 stop18h 47m
Frontier
Sun 3/2912:36 pm
IAH
-
ISP
1 stop22h 57m
Frontier
Deal found 3/5$330
This Kiwi.com deal was found by Cheapflights users on 3/7. 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 3/265:08 pm
ISP
-
IAH
1 stop14h 56m
Frontier
Thu 4/21:17 pm
IAH
-
ISP
1 stop20h 39m
Frontier
Deal found 3/7$343
This Southwest deal was found by Cheapflights users on 3/8. 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.
Mon 3/232:00 pm
ISP
-
HOU
1 stop7h 20m
Southwest
Wed 4/15:50 am
HOU
-
ISP
1 stop4h 50m
Southwest
Deal found 3/8$361
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 3/271:42 pm
ISP
-
IAH
1 stop18h 47m
Frontier
Mon 3/3010:56 pm
IAH
-
ISP
2 stops44h 03m
Frontier
Deal found 3/6$370
This CheapOair deal was found by Cheapflights users on 3/7. 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 3/301:22 pm
ISP
-
IAH
1 stop21h 23m
Frontier
Wed 4/112:46 pm
IAH
-
ISP
1 stop6h 13m
Frontier
Deal found 3/7$374
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 3/2111:50 am
ISP
-
IAH
1 stop25h 07m
Multiple Airlines
Wed 3/254:46 pm
IAH
-
ISP
1 stop22h 27m
Multiple Airlines
Deal found 3/6$379
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 3/271:42 pm
ISP
-
IAH
1 stop9h 55m
Multiple Airlines
Mon 3/309:03 pm
IAH
-
ISP
1 stop27h 18m
Multiple Airlines
Deal found 3/6$390
This Southwest deal was found by Cheapflights users on 3/8. 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 6/266:00 am
ISP
-
HOU
2 stops7h 45m
Southwest
Sun 6/287:45 am
HOU
-
ISP
1 stop7h 55m
Southwest
Deal found 3/8$399

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 10, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$190
(Frontier)

One-way from

$95
(Frontier)

Popular in

April

Cheapest in

February

Average price

$326
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. 21% potential increase in price ($84 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease ($29 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 10, 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

Sat 4/11

8:39 pm-8:38 am

1 stop12h 59m

Houston George Bush Intcntl

Sat 4/18

6:57 pm-9:13 am

1 stop13h 16m

$210

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 5/21

10:03 am-7:19 pm

1 stop10h 16m

Houston George Bush Intcntl

Tue 5/26

8:24 pm-9:08 am

1 stop11h 44m

$290
Quickest round-trip

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Mon 3/23

2:00 pm-8:20 pm

1 stop7h 20m

Houston Hobby

Wed 4/1

5:50 am-11:40 am

1 stop4h 50m

$361

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 3/27

1:42 pm-7:29 am

1 stop18h 47m

Houston George Bush Intcntl

Mon 3/30

10:56 pm-7:59 pm

2 stops44h 03m

$370

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 3/21

11:50 am-11:57 am

1 stop25h 07m

Houston George Bush Intcntl

Wed 3/25

10:56 pm-12:47 pm

2 stops36h 51m

$392

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Mon 3/23

10:58 am-8:08 pm

1 stop10h 10m

Houston George Bush Intcntl

Fri 3/27

9:03 pm-9:48 am

1 stop11h 45m

$414

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 3/26

5:08 pm-6:37 pm

1 stop26h 29m

Houston George Bush Intcntl

Sun 3/29

9:15 pm-12:33 pm

1 stop14h 18m

$444

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Fri 6/26

6:00 am-1:45 pm

2 stops8h 45m

Houston Hobby

Sun 6/28

7:45 am-4:40 pm

1 stop7h 55m

$448

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Thu 4/2

5:55 pm-11:40 pm

1 stop6h 45m

Houston Hobby

Tue 4/7

6:00 am-1:50 pm

2 stops6h 50m

$473

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 4/17

4:07 pm-8:38 am

1 stop17h 31m

Houston George Bush Intcntl

Mon 4/20

6:45 am-7:36 pm

2 stops11h 51m

$477

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/6

Showing 1-10 of 35 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.

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 March 10, 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
4,317 reviews

Crew

8.6

Boarding

8.1

Overall

8.0

Comfort

8.0

Entertainment

7.5

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
4,317 reviews
Southwest
8.0
Very good
4,317 reviews

Crew

8.6

Boarding

8.1

Overall

8.0

Comfort

8.0

Entertainment

7.5

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 7h 20m. 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 14% 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 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$266Average$406FlexibilityNo cancel feeOn-time63%

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