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Islip

$140+ 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 7/11. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ISP
Jun 28 — Jul 51
Sat 6/28
Sat 7/5
1 adult, Economy
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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 June 23, 2025.

Round-trip from

$306
(Frontier)

One-way from

$140
(Trip.com)

Popular in

December

Cheapest in

January

Average price

$255
From Houston to Islip Long Island
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One-way flight from Houston to Islip Long Island
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Highest demand for flights based on searches. 6% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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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 June 23, 2025.

This Frontier deal was found by Cheapflights users on 6/21. 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.
Tue 8/194:43 pmIAH - ISP
1 stop6h 16mFrontier
Wed 8/208:00 amISP - IAH
1 stop8h 40mFrontier
Deal found 6/21$306
This Trip.com deal was found by Cheapflights users on 6/22. 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.
Mon 6/308:56 pmIAH - ISP
1 stop21h 40mMultiple Airlines
Sun 7/136:00 amISP - IAH
1 stop14h 19mMultiple Airlines
Deal found 6/22$401
This Southwest deal was found by Cheapflights users on 6/22. 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 6/304:05 pmHOU - ISP
1 stop7h 00mSouthwest
Sun 7/1312:20 pmISP - HOU
1 stop10h 10mSouthwest
Deal found 6/22$602

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 June 23, 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

Tue 8/19

4:43 pm-11:59 pm

1 stop6h 16m

Islip Long Island

Wed 8/20

8:00 am-3:40 pm

1 stop8h 40m

$306

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Fri 8/1

5:55 am-3:19 pm

2 stops8h 24m

Islip Long Island

Sun 8/3

7:39 pm-7:43 pm

2 stops25h 04m

$554

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Fri 7/11

8:48 pm-7:42 pm

1 stop21h 54m

$140

HoustonIslip

IAH - ISP

IAHISP

Houston George Bush Intcntl

Fri 7/11

8:46 pm-1:04 pm

1 stop15h 18m

$149

HoustonIslip

HOU - ISP

HOUISP

Houston Hobby

Fri 7/11

4:05 pm-12:05 am

1 stop7h 00m

$208

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/20

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 June 23, 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 June 23, 2025.
Southwest
8.0
Very good
4,278 reviews

Comfort

8.0

Food

7.0

Boarding

8.2

Entertainment

7.6

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
4,278 reviews
Southwest
8.0
Very good
4,278 reviews

Comfort

8.0

Food

7.0

Boarding

8.2

Entertainment

7.6

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.
Frontier
5.9
Fair
3,295 reviews
Southwest
8.0
Very good
4,278 reviews

Comfort

8.0

Food

7.0

Boarding

8.2

Entertainment

7.6

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.

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

    Frontier, at $306, 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, 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

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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 June 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$336Average$437FlexibilityNo cancel feeOn-time63%

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