HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Islip

$137+ 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 5/18. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ISP
May 4 — May 111
Sun 5/4
Sun 5/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Houston to Islip with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 29, 2025.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$251
(CheapOair)

One-way from

$137
(CheapOair)

Popular in

December

Cheapest in

September

Average price

$262
Provider with most accurate pricing for Houston-New York (NYC) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Houston-New York (NYC) flights.
Search Deals
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. 5% potential increase in price ($15 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find 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 29, 2025.

This CheapOair deal was found by Cheapflights users on 4/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/149:05 pmIAH - ISP
1 stop12h 07mFrontier
Mon 5/196:48 pmISP - IAH
1 stop16h 49mFrontier
Deal found 4/28$251
This Southwest deal was found by Cheapflights users on 4/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/108:25 pmHOU - ISP
1 stop12h 00mSouthwest
Sun 7/136:00 pmISP - HOU
1 stop6h 20mSouthwest
Deal found 4/28$382
This Mytrip deal was found by Cheapflights users on 4/29. 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.
Thu 6/58:24 amIAH - ISP
2 stops24h 40mMultiple Airlines
Fri 6/63:59 pmISP - IAH
3 stops28h 00mMultiple Airlines
Deal found 4/29$513

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 29, 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

Wed 5/14

9:05 pm-10:12 am

1 stop12h 07m

Islip Long Island

Mon 5/19

6:48 pm-10:37 am

1 stop16h 49m

$251

HoustonIslip

HOU - ISP

HOUISP

Houston Hobby

Thu 7/10

8:25 pm-9:25 am

1 stop12h 00m

Islip Long Island

Sun 7/13

6:00 pm-11:20 pm

1 stop6h 20m

$382

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Thu 6/5

8:24 am-10:04 am

2 stops24h 40m

Islip Long Island

Fri 6/6

3:59 pm-6:59 pm

3 stops28h 00m

$513

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Sun 5/18

9:05 pm-10:12 am

1 stop12h 07m

$137

HoustonIslip

HOU - ISP

HOUISP

Houston Hobby

Fri 7/4

5:45 am-12:10 pm

1 stop5h 25m

$144

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Fri 6/13

7:15 pm-1:32 pm

3 stops17h 17m

$265

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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, January is the cheapest month in which you can book a flight from Houston to Islip, New York (average of $108). Flying from Houston to Islip, New York in November is currently the most expensive (average of $213). 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 April 29, 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 at noon, which can drop the price by up to 2% versus a flight in the morning.

Rainfall in Islip by month

Plan your trip to Islip by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Islip, New York ranges from 3.3 - 4.4 inches per month. March is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Islip, New York when rainfall is around 3.3 in.

Temperature in Islip by month

Plan your trip to Islip by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Islip, New York, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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 29, 2025.
Southwest
8.0
Very good
4,295 reviews

Food

7.1

Boarding

8.2

Comfort

8.0

Overall

8.0

Crew

8.6

Entertainment

7.6

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
4,295 reviews
Southwest
8.0
Very good
4,295 reviews

Food

7.1

Boarding

8.2

Comfort

8.0

Overall

8.0

Crew

8.6

Entertainment

7.6

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.
Frontier
6.0
Okay
3,284 reviews
Southwest
8.0
Very good
4,295 reviews

Food

7.1

Boarding

8.2

Comfort

8.0

Overall

8.0

Crew

8.6

Entertainment

7.6

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.

  • What are the cheapest airlines flying from Houston to Islip, New York round-trip?

    Frontier, at $251, was found to be the cheapest airline from Houston to Islip, New York. An alternate airline flying to your destination would be Southwest.

  • 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, January is the cheapest month in which you can book a flight from Houston to Islip, New York (average of $108). Flying from Houston to Islip, New York in November is currently the most expensive (average of $213). 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 Houston?

Book flights to Houston if you plan to visit one of these locations
Southampton
Riverhead

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Houston to Islip

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to LaGuardia flights
Dallas/Fort Worth to John F Kennedy Intl flights
Dallas/Fort Worth to Newark flights
Hobby to LaGuardia flights
Hobby to John F Kennedy Intl flights
Hobby to Newark flights
George Bush Intcntl to John F Kennedy Intl flights
Austin to Newark flights
George Bush Intcntl to Newark flights
Austin to John F Kennedy Intl flights
Love Field to LaGuardia flights
George Bush Intcntl to LaGuardia flights
Austin to LaGuardia flights
San Antonio to Newark flights
Dallas/Fort Worth to Buffalo flights
San Antonio to LaGuardia flights
San Antonio to John F Kennedy Intl flights
Dallas/Fort Worth to Syracuse flights
Love Field to Newark flights
Hobby to Buffalo flights
Hobby to Syracuse flights
Dallas/Fort Worth to Albany flights
Love Field to John F Kennedy Intl flights
Dallas/Fort Worth to Islip flights
El Paso to John F Kennedy Intl flights
Dallas/Fort Worth to Rochester flights
George Bush Intcntl to Buffalo flights
Dallas/Fort Worth to White Plains flights
El Paso to LaGuardia flights
El Paso to Newark flights
George Bush Intcntl to Syracuse flights
Austin to Albany flights
Austin to Buffalo flights
Hobby to Rochester flights
San Antonio to Buffalo flights
Hobby to Islip flights
George Bush Intcntl to Islip flights
Austin to Syracuse flights
Love Field to Buffalo flights
McAllen to John F Kennedy Intl flights
Austin to White Plains flights
George Bush Intcntl to Rochester flights
Hobby to Albany flights
San Antonio to White Plains flights
McAllen to Newark flights
McAllen to LaGuardia flights
Dallas/Fort Worth to Ithaca flights
San Antonio to Rochester flights
Austin to Stewart flights
Dallas/Fort Worth to Binghamton flights

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 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$349Average$431FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.