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Islip

$95+ 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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ISP
Apr 4 — Apr 111
Sat 4/4
Sat 4/11
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 March 5, 2026.

This Frontier deal was found by Cheapflights users on 3/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/212:14 pm
IAH
-
ISP
1 stop12h 12m
Frontier
Sat 4/115:45 am
ISP
-
IAH
1 stop10h 29m
Frontier
Deal found 3/3$214
This Kiwi.com deal was found by Cheapflights users on 3/3. 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.
Sat 4/256:14 pm
IAH
-
ISP
2 stops24h 26m
Frontier
Mon 5/44:07 pm
ISP
-
IAH
1 stop17h 31m
Frontier
Deal found 3/3$226
This Frontier deal was found by Cheapflights users on 3/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/176:59 pm
IAH
-
ISP
1 stop13h 14m
Frontier
Wed 5/2710:03 am
ISP
-
IAH
1 stop10h 16m
Frontier
Deal found 3/1$240
This Frontier deal was found by Cheapflights users on 3/2. 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 5/218:24 pm
IAH
-
ISP
1 stop11h 44m
Frontier
Tue 5/2610:03 am
ISP
-
IAH
1 stop10h 16m
Frontier
Deal found 3/2$250
This Frontier deal was found by Cheapflights users on 3/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/176:59 pm
IAH
-
ISP
1 stop13h 14m
Frontier
Mon 6/110:03 am
ISP
-
IAH
1 stop10h 16m
Frontier
Deal found 3/1$261
This Expedia deal was found by Cheapflights users on 3/4. 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 3/209:03 pm
IAH
-
ISP
1 stop11h 45m
Frontier
Mon 3/231:22 pm
ISP
-
IAH
1 stop20h 18m
Frontier
Deal found 3/4$270
This Southwest deal was found by Cheapflights users on 3/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/255:35 am
HOU
-
ISP
1 stop5h 00m
Southwest
Mon 5/44:30 pm
ISP
-
HOU
1 stop8h 35m
Southwest
Deal found 3/3$287
This Frontier deal was found by Cheapflights users on 3/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/176:59 pm
IAH
-
ISP
1 stop13h 14m
Frontier
Sun 5/3110:03 am
ISP
-
IAH
1 stop10h 16m
Frontier
Deal found 3/1$290
This Frontier deal was found by Cheapflights users on 2/28. 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 7/138:24 pm
IAH
-
ISP
1 stop11h 44m
Frontier
Mon 7/2710:03 am
ISP
-
IAH
1 stop10h 16m
Frontier
Deal found 2/28$330
This Kiwi.com deal was found by Cheapflights users on 3/3. 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 3/184:46 pm
IAH
-
ISP
1 stop22h 03m
Multiple Airlines
Wed 3/2511:50 am
ISP
-
IAH
2 stops12h 06m
Multiple Airlines
Deal found 3/3$336
This Kiwi.com deal was found by Cheapflights users on 3/4. 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 3/206:08 pm
IAH
-
ISP
2 stops16h 02m
Multiple Airlines
Mon 3/231:22 pm
ISP
-
IAH
1 stop20h 18m
Multiple Airlines
Deal found 3/4$348
This Trip.com deal was found by Cheapflights users on 3/4. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/211:15 am
IAH
-
ISP
1 stop7h 36m
Multiple Airlines
Sun 4/512:08 pm
ISP
-
IAH
1 stop11h 29m
Multiple Airlines
Deal found 3/4$363

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 March 5, 2026.

Round-trip from

$214
(Frontier)

One-way from

$95
(Frontier)

Popular in

December

Cheapest in

September

Average price

$270
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. 4% potential increase in price ($11 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 March 2026
Search Deals

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 March 5, 2026.
Use the filters below to find and compare flights from Houston to Islip that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Sat 4/25

2:01 pm-9:13 am

1 stop18h 12m

Islip Long Island

Mon 5/4

4:07 pm-8:38 am

1 stop17h 31m

$258

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Sun 5/17

6:59 pm-9:13 am

1 stop13h 14m

Islip Long Island

Mon 6/1

10:03 am-7:19 pm

1 stop10h 16m

$261

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Sun 5/17

6:59 pm-9:13 am

1 stop13h 14m

Islip Long Island

Fri 5/29

10:03 am-7:19 pm

1 stop10h 16m

$261

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Sun 5/17

6:59 pm-9:13 am

1 stop13h 14m

Islip Long Island

Tue 5/26

10:03 am-7:19 pm

1 stop10h 16m

$270

HoustonIslip

HOU - ISP

HOUISP

Houston Hobby

Sat 4/25

5:35 am-11:35 am

1 stop5h 00m

Islip Long Island

Mon 5/4

4:30 pm-12:05 am

1 stop8h 35m

$287

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Mon 7/13

8:24 pm-9:08 am

1 stop11h 44m

Islip Long Island

Mon 7/27

10:03 am-7:19 pm

1 stop10h 16m

$330

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Wed 3/18

4:46 pm-3:49 pm

1 stop22h 03m

Islip Long Island

Wed 3/25

11:50 am-10:56 pm

2 stops12h 06m

$336

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Thu 4/2

11:15 am-7:51 pm

1 stop7h 36m

Islip Long Island

Sun 4/5

12:08 pm-10:37 pm

1 stop11h 29m

$363

HoustonIslip

HOU - ISP

HOUISP

Houston Hobby

Wed 3/18

4:25 pm-10:50 pm

1 stop5h 25m

Islip Long Island

Wed 3/25

5:45 am-1:50 pm

2 stops9h 05m

$366

HoustonIslip

HOU - ISP

HOUISP

Houston Hobby

Thu 4/2

7:20 am-4:30 pm

1 stop8h 10m

Islip Long Island

Sun 4/5

12:20 pm-9:45 pm

1 stop10h 25m

$374

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/2

Showing 1-10 of 28 resultsSorted by cheapest first
1
2
3

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 June is currently the most expensive (average of $117). 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 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 March 5, 2026.
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
4,307 reviews

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
6.0
Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.
Southwest
8.0
Very good
4,307 reviews
Southwest
8.0
Very good
4,307 reviews

Boarding

8.1

Food

7.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
6.0
Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.

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 $287, Frontier can have you in Islip, New York from Houston in 5h. 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 $278, 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 June is currently the most expensive (average of $117). 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

Traveling to a place near Islip?

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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 March 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$278Average$576FlexibilityNo cancel feeOn-time63%

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