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Islip

$63+ 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ISP
May 9 — May 161
Sat 5/9
Sat 5/16
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 April 9, 2026.

This CheapOair deal was found by Cheapflights users on 4/8. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/26:57 pm
IAH
-
ISP
1 stop13h 16m
Frontier
Mon 5/44:07 pm
ISP
-
IAH
1 stop27h 42m
Frontier
Deal found 4/8$185
This CheapOair deal was found by Cheapflights users on 4/8. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/231:58 pm
IAH
-
ISP
1 stop28h 38m
Frontier
Sun 4/264:07 pm
ISP
-
IAH
1 stop26h 52m
Frontier
Deal found 4/8$205
This CheapOair deal was found by Cheapflights users on 4/8. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/167:55 pm
IAH
-
ISP
1 stop12h 18m
Frontier
Sun 4/194:07 pm
ISP
-
IAH
1 stop26h 52m
Frontier
Deal found 4/8$250
This Frontier deal was found by Cheapflights users on 4/4. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/912:14 pm
IAH
-
ISP
1 stop12h 12m
Frontier
Sat 4/115:45 am
ISP
-
IAH
1 stop10h 29m
Frontier
Deal found 4/4$260
This CheapOair deal was found by Cheapflights users on 4/6. 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.
Thu 4/912:14 pm
IAH
-
ISP
1 stop12h 12m
Frontier
Sun 4/1212:08 pm
ISP
-
IAH
1 stop19h 54m
Frontier
Deal found 4/6$270
This Expedia deal was found by Cheapflights users on 4/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/211:29 pm
IAH
-
ISP
1 stop19h 36m
Frontier
Mon 5/2511:00 am
ISP
-
IAH
1 stop22h 50m
Frontier
Deal found 4/6$290
This Frontier deal was found by Cheapflights users on 4/4. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/108:02 am
IAH
-
ISP
1 stop6h 09m
Frontier
Sun 4/127:59 pm
ISP
-
IAH
1 stop12h 03m
Frontier
Deal found 4/4$315
This Frontier deal was found by Cheapflights users on 4/6. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/912:14 pm
IAH
-
ISP
1 stop12h 12m
Frontier
Fri 4/107:34 pm
ISP
-
IAH
1 stop12h 28m
Frontier
Deal found 4/6$338
This CheapOair deal was found by Cheapflights users on 4/8. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/114:09 pm
IAH
-
ISP
1 stop6h 50m
Frontier
Mon 4/137:34 pm
ISP
-
IAH
1 stop14h 04m
Frontier
Deal found 4/8$340
This Southwest deal was found by Cheapflights users on 4/8. 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.
Wed 7/152:50 pm
HOU
-
ISP
1 stop6h 45m
Southwest
Thu 7/305:20 am
ISP
-
HOU
1 stop6h 50m
Southwest
Deal found 4/8$341
This Southwest deal was found by Cheapflights users on 4/8. 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.
Sat 7/115:25 am
HOU
-
ISP
1 stop5h 10m
Southwest
Mon 7/136:05 pm
ISP
-
HOU
1 stop6h 40m
Southwest
Deal found 4/8$353
This Southwest deal was found by Cheapflights users on 4/8. 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.
Sat 6/133:40 pm
HOU
-
ISP
1 stop6h 15m
Southwest
Sat 6/2012:15 pm
ISP
-
HOU
1 stop10h 15m
Southwest
Deal found 4/8$394

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 April 9, 2026.

Round-trip from

$185
(CheapOair)

One-way from

$63
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$281
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. 2% potential increase in price ($6 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 9, 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

Cheapest round-trip

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Thu 4/23

1:58 pm-7:36 pm

1 stop28h 38m

Islip Long Island

Sun 4/26

4:07 pm-5:59 pm

1 stop26h 52m

$205

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Thu 5/21

1:29 pm-10:05 am

1 stop19h 36m

Islip Long Island

Mon 5/25

11:00 am-8:50 am

1 stop22h 50m

$290
Quickest round-trip

HoustonIslip

HOU - ISP

HOUISP

Houston Hobby

Sat 7/11

5:25 am-11:35 am

1 stop5h 10m

Islip Long Island

Mon 7/13

6:05 pm-11:45 pm

1 stop6h 40m

$353

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Sat 6/13

8:37 pm-1:28 pm

2 stops39h 51m

Islip Long Island

Sat 6/20

10:48 am-6:29 pm

1 stop8h 41m

$378

HoustonIslip

HOU - ISP

HOUISP

Houston Hobby

Sat 6/13

3:40 pm-10:55 pm

1 stop6h 15m

Islip Long Island

Sat 6/20

12:15 pm-9:30 pm

1 stop10h 15m

$394

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Fri 6/26

7:04 pm-10:03 am

1 stop13h 59m

Islip Long Island

Mon 6/29

2:28 pm-8:47 am

2 stops19h 19m

$400

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Sun 5/3

8:06 pm-9:13 am

1 stop12h 07m

Islip Long Island

Sun 5/10

11:12 am-6:33 pm

1 stop8h 21m

$405

HoustonIslip

HOU - ISP

HOUISP

Houston Hobby

Wed 7/15

1:45 pm-10:35 pm

2 stops7h 50m

Islip Long Island

Thu 7/30

6:00 am-12:45 pm

2 stops7h 45m

$411

HoustonIslip

HOU - ISP

HOUISP

Houston Hobby

Fri 6/26

8:40 pm-9:45 am

1 stop12h 05m

Islip Long Island

Mon 6/29

5:50 pm-10:15 pm

1 stop5h 25m

$413

HoustonIslip

HOU - ISP

HOUISP

Houston Hobby

Fri 7/10

8:40 pm-9:45 am

1 stop12h 05m

Islip Long Island

Sun 7/12

3:30 pm-9:50 pm

1 stop7h 20m

$424

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/5

Showing 1-10 of 27 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 April is currently the most expensive (average of $126). 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 April 9, 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
4,338 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Overall

8.0

Comfort

8.0

Crew

8.6

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
4,338 reviews
Southwest
8.0
Very good
4,338 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Overall

8.0

Comfort

8.0

Crew

8.6

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 $353, Frontier can have you in Islip, New York from Houston in 5h 10m. 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 April is currently the most expensive (average of $126). 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?

Book flights to Islip if you plan to visit one of these locations
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Alternative routes for Houston to Islip

See prices for flight routes from nearby airports that may be better suited for you.
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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 April 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$278Average$592FlexibilityNo cancel feeOn-time63%

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