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Islip

$92+ Cheap flights from Houston to Islip, NY (ISP)

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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ISP
Jan 8 — Jan 151
Thu 1/8
Thu 1/15
1 adult, Economy
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Cheap flight deals from Houston to Islip

Cheapest flights from Houston to Islip
Explore the most affordable flight options available from Houston to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 9, 2025.

This CheapOair deal was found by Cheapflights users on 12/7. 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 12/158:07 pmIAH - ISP
1 stop22h 27mFrontier
Fri 12/196:00 amISP - IAH
1 stop27h 35mFrontier
Deal found 12/7$229
This CheapOair deal was found by Cheapflights users on 12/6. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/319:34 pmIAH - ISP
1 stop12h 51mFrontier
Fri 1/26:00 amISP - IAH
1 stop27h 35mFrontier
Deal found 12/6$239
This Mytrip deal was found by Cheapflights users on 12/7. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/239:34 pmIAH - ISP
1 stop18h 03mFrontier
Thu 1/112:20 pmISP - IAH
1 stop7h 44mFrontier
Deal found 12/7$242
This Kiwi.com deal was found by Cheapflights users on 12/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/108:07 pmIAH - ISP
1 stop12h 06mMultiple Airlines
Sat 12/1310:19 amISP - IAH
2 stops15h 38mMultiple Airlines
Deal found 12/8$249
This CheapOair deal was found by Cheapflights users on 12/7. 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 12/229:34 pmIAH - ISP
1 stop12h 51mFrontier
Mon 12/298:35 pmISP - IAH
1 stop23h 02mFrontier
Deal found 12/7$254
This Frontier deal was found by Cheapflights users on 12/7. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/229:34 pmIAH - ISP
1 stop12h 51mFrontier
Sun 1/48:24 pmISP - IAH
1 stop11h 57mFrontier
Deal found 12/7$267
This CheapOair deal was found by Cheapflights users on 12/7. 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.
Tue 12/98:07 pmIAH - ISP
1 stop25h 37mFrontier
Sat 12/1310:19 amISP - IAH
1 stop9h 10mFrontier
Deal found 12/7$305
This Mytrip deal was found by Cheapflights users on 12/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/138:07 pmIAH - ISP
1 stop13h 13mFrontier
Tue 12/168:29 pmISP - IAH
1 stop23h 00mFrontier
Deal found 12/8$317
This Frontier deal was found by Cheapflights users on 12/8. 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.
Mon 12/299:34 pmIAH - ISP
1 stop12h 51mFrontier
Sun 1/48:24 pmISP - IAH
1 stop11h 57mFrontier
Deal found 12/8$318
This Kiwi.com deal was found by Cheapflights users on 12/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/138:23 pmIAH - ISP
1 stop12h 57mMultiple Airlines
Tue 12/168:29 pmISP - IAH
2 stops39h 08mMultiple Airlines
Deal found 12/8$338
This Southwest deal was found by Cheapflights users on 12/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/233:25 pmHOU - ISP
1 stop7h 30mSouthwest
Thu 1/13:40 pmISP - HOU
1 stop6h 30mSouthwest
Deal found 12/7$412
This Southwest deal was found by Cheapflights users on 12/8. 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.
Thu 12/116:00 amHOU - ISP
1 stop5h 15mSouthwest
Tue 12/1612:55 pmISP - HOU
1 stop6h 20mSouthwest
Deal found 12/8$835

Find flight deals from Houston to Islip

Discover tips and strategies to find the most affordable flight options for your journey from Houston (HO1) to Islip (ISP). 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 9, 2025.

Round-trip from

$183
(CheapOair)

One-way from

$92
(CheapOair)

Popular in

December

Cheapest in

September

Average price

$326
From Houston to Islip Long Island
Search Deals
One-way flight from Houston to Islip Long Island
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Houston to Islip 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 9, 2025.
Use the filters below to find and compare flights from Houston to Islip that are best for you.

Fly from

Houston

Fly to

Islip

Route

Depart

Return

Price

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Sat 3/7

9:07 am-11:59 pm

1 stop13h 52m

Islip Long Island

Mon 3/9

8:19 pm-7:54 am

1 stop12h 35m

$183

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Wed 12/31

9:34 pm-11:25 am

1 stop12h 51m

Islip Long Island

Fri 1/2

6:00 am-8:35 am

1 stop27h 35m

$239

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Tue 12/23

9:34 pm-4:37 pm

1 stop18h 03m

Islip Long Island

Thu 1/1

12:20 pm-7:04 pm

1 stop7h 44m

$242

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Fri 1/16

12:41 pm-7:50 pm

1 stop6h 09m

Islip Long Island

Tue 1/20

12:00 pm-9:57 pm

1 stop10h 57m

$251

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Fri 1/9

8:13 pm-7:08 pm

1 stop21h 55m

Islip Long Island

Sun 1/11

8:40 pm-10:01 am

1 stop14h 21m

$253

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Mon 12/22

9:34 pm-11:25 am

1 stop12h 51m

Islip Long Island

Mon 12/29

8:35 pm-6:37 pm

1 stop23h 02m

$254

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Wed 12/24

9:34 pm-11:25 am

1 stop12h 51m

Islip Long Island

Sun 1/4

8:24 pm-7:21 am

1 stop11h 57m

$267

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Wed 12/31

9:34 pm-11:25 am

1 stop12h 51m

Islip Long Island

Sun 1/4

8:24 pm-7:21 am

1 stop11h 57m

$268

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Tue 3/31

8:17 pm-7:11 pm

1 stop21h 54m

Islip Long Island

Sat 4/11

9:41 am-7:04 pm

1 stop10h 23m

$273

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Tue 3/31

8:17 pm-7:11 pm

1 stop21h 54m

Islip Long Island

Fri 4/10

9:41 am-7:04 pm

1 stop10h 23m

$287

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/8

Showing 1-10 of 23 results
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Best time to book a flight from Houston to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Houston 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 Houston to Islip

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

Currently, November is the cheapest month in which you can book a flight from Houston to Islip, New York (average of $65). Flying from Houston to Islip, New York in December is currently the most expensive (average of $119). 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 HOU to ISP?

Find hourly flight availability from Houston to Islip. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 9, 2025.

When flying from Houston to Islip, New York, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 18% versus a flight in the afternoon.

Reviews of airlines servicing Islip

Get insights into the airlines that provide service to Islip. 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 Islip. Reviews last updated December 9, 2025.
See what other customers who have flown with Southwest from Houston to Islip have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,254 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.0
Very good
4,254 reviews
Southwest
8.0
Very good
4,254 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Related info for your journey

Find useful and relevant information for your journey from Houston to Islip. 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 into for flights to Islip from Houston?

    For a flight from Houston to Islip, you will be flying into 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 inbound flights from Houston per day. 1 airline has flights to Islip Long Island from Houston on a regular basis.

  • How long is the flight from Houston to Islip, New York?

    For as low as $402, Frontier can have you in Islip, New York from Houston in 4h 50m. The distance between Houston and Islip, New York is about 1462 mi. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Houston to Islip, New York round-trip?

    Southwest, at $336, was found to be the cheapest airline from Houston to Islip, New York..

  • Can I find deals for flights from Houston to Islip that include hotel bookings?

    Yes. In addition to deals on Houston to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Houston to Islip?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Houston to Islip.

  • Can I find deals for business class flights from Houston to Islip?

    Yes. Cheapflights offers flight deals from Houston to Islip 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 Houston to Islip, New York?

    Currently, November is the cheapest month in which you can book a flight from Houston to Islip, New York (average of $65). Flying from Houston to Islip, New York in December is currently the most expensive (average of $119). 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 Houston to Islip

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Top airline flying from Houston to Islip

Discover the top airline that operate flights from Houston to Islip. 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 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$336Average$576FlexibilityNo cancel feeOn-time63%

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