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Cheap flights from Islip, New York to Houston from $127

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Islip, New York to Houston departing on 8/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Islip, New York to Houston

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
7:09 pm - 8:02 am
ISP
-
IAH
13h 53m
1 stop
Frontier Logo
3:25 pm - 9:53 am
IAH
-
ISP
17h 28m
1 stop
$242Frontier
Fri, Aug 21 - Sun, Aug 23
Southwest Logo
6:05 am - 1:15 pm
ISP
-
HOU
8h 10m
1 stop
Southwest Logo
1:35 pm - 8:45 pm
HOU
-
ISP
6h 10m
1 stop
$267Southwest
Wed, Sep 2 - Sat, Sep 5
Southwest Logo
3:20 pm - 7:55 pm
ISP
-
HOU
5h 35m
1 stop
Southwest Logo
10:40 am - 8:45 pm
HOU
-
ISP
9h 05m
2 stops
$272Southwest
Wed, Sep 2 - Sat, Sep 5
Multiple Airlines Logo
11:57 am - 10:14 pm
ISP
-
IAH
11h 17m
2 stops
Multiple Airlines Logo
8:57 am - 6:14 pm
IAH
-
ISP
8h 17m
1 stop
$276Multiple Airlines
Wed, Sep 2 - Sat, Sep 5
Southwest Logo
6:05 am - 1:00 pm
ISP
-
HOU
7h 55m
2 stops
Southwest Logo
10:40 am - 8:45 pm
HOU
-
ISP
9h 05m
2 stops
$278Southwest
Wed, Sep 2 - Sat, Sep 5
Multiple Airlines Logo
6:00 am - 11:47 am
ISP
-
IAH
6h 47m
1 stop
Multiple Airlines Logo
8:57 am - 6:14 pm
IAH
-
ISP
8h 17m
1 stop
$320Multiple Airlines
Thu, Aug 13 - Thu, Aug 20
Multiple Airlines Logo
7:49 pm - 7:20 am
ISP
-
IAH
36h 31m
2 stops
Multiple Airlines Logo
8:57 am - 6:14 pm
IAH
-
ISP
8h 17m
1 stop
$325Multiple Airlines
Thu, Aug 13 - Thu, Aug 20
Multiple Airlines Logo
7:45 pm - 10:06 pm
ISP
-
IAH
27h 21m
2 stops
Multiple Airlines Logo
4:39 pm - 2:33 pm
IAH
-
ISP
20h 54m
1 stop
$349Multiple Airlines
Thu, Oct 22 - Tue, Oct 27
JetBlue Logo
6:00 am - 11:47 am
ISP
-
IAH
6h 47m
1 stop
JetBlue Logo
1:00 pm - 9:49 pm
IAH
-
ISP
7h 49m
1 stop
$397JetBlue
Thu, Aug 13 - Thu, Aug 20
JetBlue Logo
6:00 am - 11:47 am
ISP
-
IAH
6h 47m
1 stop
JetBlue Logo
1:00 pm - 9:35 pm
IAH
-
ISP
7h 35m
1 stop
$411JetBlue
Tue, Oct 20 - Wed, Oct 21

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Southwest flights from Islip, New York to Houston

Our best Southwest deals on Islip, New York to Houston flight tickets
Southwest
Sep 2
ISP6:05 amIslip Long Island
8h 10m
1 stop
HOU1:15 pmHouston Hobby
Sep 5
HOU1:35 pmHouston Hobby
6h 10m
1 stop
ISP8:45 pmIslip Long Island
$267
Southwest
Sep 2
ISP3:20 pmIslip Long Island
5h 35m
1 stop
HOU7:55 pmHouston Hobby
Sep 5
HOU10:40 amHouston Hobby
9h 05m
2 stops
ISP8:45 pmIslip Long Island
$272
Southwest
Sep 2
ISP6:05 amIslip Long Island
7h 55m
2 stops
HOU1:00 pmHouston Hobby
Sep 5
HOU10:40 amHouston Hobby
9h 05m
2 stops
ISP8:45 pmIslip Long Island
$278

JetBlue flights from Islip, New York to Houston

Our best JetBlue deals on Islip, New York to Houston flight tickets
JetBlue
Aug 13
ISP6:00 amIslip Long Island
6h 47m
1 stop
IAH11:47 amHouston George Bush Intcntl
Aug 20
IAH1:00 pmHouston George Bush Intcntl
7h 49m
1 stop
ISP9:49 pmIslip Long Island
$397
JetBlue
Oct 20
ISP6:00 amIslip Long Island
6h 47m
1 stop
IAH11:47 amHouston George Bush Intcntl
Oct 21
IAH1:00 pmHouston George Bush Intcntl
7h 35m
1 stop
ISP9:35 pmIslip Long Island
$411
JetBlue
Aug 24
ISP6:00 amIslip Long Island
10h 47m
1 stop
IAH3:47 pmHouston George Bush Intcntl
Aug 26
IAH1:00 pmHouston George Bush Intcntl
7h 44m
1 stop
ISP9:44 pmIslip Long Island
$436

momondo Fare Finder

 
Customize your flight search to find flights from Islip, New York to Houston 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, momondo users made 832,500 searches. Data last updated July 21, 2026.
Use the filters below to find and compare flights from Islip, New York to Houston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 8/21

7:09 pm-8:02 am

1 stop13h 53m

Houston George Bush Intcntl

Sun 8/23

3:25 pm-9:53 am

1 stop17h 28m

$242
Quickest round-trip

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Wed 9/2

6:05 am-1:15 pm

1 stop8h 10m

Houston Hobby

Sat 9/5

1:35 pm-8:45 pm

1 stop6h 10m

$267

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Wed 9/2

3:20 pm-7:55 pm

1 stop5h 35m

Houston Hobby

Sat 9/5

10:40 am-8:45 pm

2 stops9h 05m

$272

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 9/2

11:57 am-10:14 pm

2 stops11h 17m

Houston George Bush Intcntl

Sat 9/5

8:57 am-6:14 pm

1 stop8h 17m

$276

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Wed 9/2

6:05 am-1:00 pm

2 stops7h 55m

Houston Hobby

Sat 9/5

10:40 am-8:45 pm

2 stops9h 05m

$278

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 8/13

6:00 am-11:47 am

1 stop6h 47m

Houston George Bush Intcntl

Thu 8/20

8:57 am-6:14 pm

1 stop8h 17m

$320

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 8/13

7:49 pm-7:20 am

2 stops36h 31m

Houston George Bush Intcntl

Thu 8/20

8:57 am-6:14 pm

1 stop8h 17m

$325

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 10/22

7:45 pm-10:06 pm

2 stops27h 21m

Houston George Bush Intcntl

Tue 10/27

4:39 pm-2:33 pm

1 stop20h 54m

$349

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 8/13

6:00 am-11:47 am

1 stop6h 47m

Houston George Bush Intcntl

Thu 8/20

1:00 pm-9:49 pm

1 stop7h 49m

$397

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Tue 10/20

6:00 am-11:47 am

1 stop6h 47m

Houston George Bush Intcntl

Wed 10/21

1:00 pm-9:35 pm

1 stop7h 35m

$411

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Houston from

How to get the cheapest flight ticket from Islip, New York to Houston

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Houston?

On average, the least expensive day to fly to Houston from Islip, New York is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $341. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Houston on Sunday is $447.

What is the cheapest time of day to depart on your flight to Houston?

Our data shows that the cheapest Islip, New York to Houston flights are usually those with departure times at noon. Our users have found flights to Houston at noon for as low as $427. Try not to purchase tickets in the afternoon because they tend to be around $478. Of course, these prices can vary depending on the time of year and what airport you fly to.

Cheap Islip, New York to Houston flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip, New York to Houston

Fastest flight time

6h 47m

Direct flights

None
The fastest flight from Islip, New York to Houston takes 6h 47m
There are no direct flights from Islip, New York to Houston. There are no popular flight routes from Islip, New York to Houston.
Search flight deals

Frequently asked questions about flying from Islip, New York to Houston

  • How far is Islip Long Island to Houston by plane?

    The straight-line distance from Islip Long Island to Houston is 1454.8 mi. Typically, this will take 6h 47m by plane in normal conditions.

  • When did momondo last update prices for flights from Islip Long Island Airport to Houston?

    Prices for flights from Islip Long Island Airport to Houston are refreshed on a daily basis.

  • How many operators does momondo search for flights from Islip Long Island Airport to Houston?

  • How old do you have to be to fly from Islip Long Island Airport to Houston?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Islip Long Island Airport to Houston.

  • What documentation or ID do you need to fly to Houston?

    The necessary travel and health documents for your Houston trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Islip, New York to Houston

Compare and see reviews for airlines that fly from Islip, New York to Houston with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $266Free CancellationRating
8.0
4,238 reviews
Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Islip to Houston?

It is quick and easy to find Islip to Houston flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Houston that suits you.

Can I find flights from Islip to Houston with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Islip to Houston flights to just show those with flexible booking policies.

How can momondo help me find flights from Islip to Houston?

Once you have performed a search for Islip to Houston flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Islip to Houston right now. Can momondo alert me if prices change?

Price alerts on flights to Houston from Islip are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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