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Cheap flights from Islip, New York to Houston from $140

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 8/13. 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.
Multiple Airlines Logo
5:27 pm - 12:12 pm
ISP
-
IAH
19h 45m
1 stop
Multiple Airlines Logo
9:42 am - 4:47 pm
IAH
-
ISP
6h 05m
1 stop
$256Multiple Airlines
Tue, Aug 18 - Tue, Aug 25
Southwest Logo
12:35 pm - 8:05 pm
ISP
-
HOU
8h 30m
2 stops
Southwest Logo
11:20 am - 9:05 pm
HOU
-
ISP
8h 45m
2 stops
$257Southwest
Thu, Aug 13 - Tue, Aug 18
Southwest Logo
12:35 pm - 8:05 pm
ISP
-
HOU
8h 30m
2 stops
Southwest Logo
11:20 am - 9:05 pm
HOU
-
ISP
8h 45m
1 stop
$258Southwest
Thu, Aug 13 - Tue, Aug 18
Multiple Airlines Logo
5:27 pm - 12:12 pm
ISP
-
IAH
19h 45m
1 stop
Multiple Airlines Logo
8:02 pm - 11:17 am
IAH
-
ISP
14h 15m
2 stops
$285Multiple Airlines
Tue, Aug 18 - Tue, Aug 25
Southwest Logo
5:00 pm - 10:20 pm
ISP
-
HOU
6h 20m
1 stop
Southwest Logo
6:10 am - 12:35 pm
HOU
-
ISP
5h 25m
1 stop
$290Southwest
Fri, Sep 4 - Mon, Sep 7
Southwest Logo
12:35 pm - 8:05 pm
ISP
-
HOU
8h 30m
2 stops
Southwest Logo
6:10 am - 12:35 pm
HOU
-
ISP
5h 25m
1 stop
$295Southwest
Fri, Sep 4 - Mon, Sep 7
Frontier Logo
9:52 pm - 8:47 am
ISP
-
IAH
11h 55m
1 stop
Frontier Logo
7:24 pm - 8:57 pm
IAH
-
ISP
24h 33m
1 stop
$330Frontier
Wed, Jun 24 - Sat, Jun 27
Frontier Logo
4:13 pm - 10:24 am
ISP
-
IAH
19h 11m
1 stop
Frontier Logo
12:21 pm - 2:33 pm
IAH
-
ISP
25h 12m
1 stop
$337Frontier
Thu, Oct 22 - Mon, Oct 26
JetBlue Logo
5:00 pm - 11:02 pm
ISP
-
IAH
7h 02m
1 stop
JetBlue Logo
1:00 pm - 9:34 pm
IAH
-
ISP
7h 34m
1 stop
$361JetBlue
Tue, Sep 1 - Wed, Sep 2
JetBlue Logo
6:00 am - 11:47 am
ISP
-
IAH
6h 47m
1 stop
JetBlue Logo
1:00 pm - 10:56 pm
IAH
-
ISP
8h 56m
1 stop
$372JetBlue
Thu, Jul 9 - Tue, Aug 11

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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
Aug 13
ISP12:35 pmIslip Long Island
8h 30m
2 stops
HOU8:05 pmHouston Hobby
Aug 18
HOU11:20 amHouston Hobby
8h 45m
2 stops
ISP9:05 pmIslip Long Island
$257
Southwest
Aug 13
ISP12:35 pmIslip Long Island
8h 30m
2 stops
HOU8:05 pmHouston Hobby
Aug 18
HOU11:20 amHouston Hobby
8h 45m
1 stop
ISP9:05 pmIslip Long Island
$258
Southwest
Sep 4
ISP5:00 pmIslip Long Island
6h 20m
1 stop
HOU10:20 pmHouston Hobby
Sep 7
HOU6:10 amHouston Hobby
5h 25m
1 stop
ISP12:35 pmIslip Long Island
$290

JetBlue flights from Islip, New York to Houston

Our best JetBlue deals on Islip, New York to Houston flight tickets
JetBlue
Sep 1
ISP5:00 pmIslip Long Island
7h 02m
1 stop
IAH11:02 pmHouston George Bush Intcntl
Sep 2
IAH1:00 pmHouston George Bush Intcntl
7h 34m
1 stop
ISP9:34 pmIslip Long Island
$361
JetBlue
Jul 9
ISP6:00 amIslip Long Island
6h 47m
1 stop
IAH11:47 amHouston George Bush Intcntl
Aug 11
IAH1:00 pmHouston George Bush Intcntl
8h 56m
1 stop
ISP10:56 pmIslip Long Island
$372
JetBlue
Jul 21
ISP6:00 amIslip Long Island
10h 47m
1 stop
IAH3:47 pmHouston George Bush Intcntl
Jul 28
IAH1:00 pmHouston George Bush Intcntl
7h 44m
1 stop
ISP9:44 pmIslip Long Island
$383

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 June 11, 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

Tue 8/18

5:27 pm-12:12 pm

1 stop19h 45m

Houston George Bush Intcntl

Tue 8/25

9:42 am-4:47 pm

1 stop6h 05m

$256

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Thu 8/13

12:35 pm-8:05 pm

2 stops8h 30m

Houston Hobby

Tue 8/18

11:20 am-9:05 pm

2 stops8h 45m

$257

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Thu 8/13

12:35 pm-8:05 pm

2 stops8h 30m

Houston Hobby

Tue 8/18

11:20 am-9:05 pm

1 stop8h 45m

$258

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Tue 8/18

5:27 pm-12:12 pm

1 stop19h 45m

Houston George Bush Intcntl

Tue 8/25

8:02 pm-11:17 am

2 stops14h 15m

$285
Quickest round-trip

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Fri 9/4

5:00 pm-10:20 pm

1 stop6h 20m

Houston Hobby

Mon 9/7

6:10 am-12:35 pm

1 stop5h 25m

$290

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Fri 9/4

12:35 pm-8:05 pm

2 stops8h 30m

Houston Hobby

Mon 9/7

6:10 am-12:35 pm

1 stop5h 25m

$295

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 6/24

9:52 pm-8:47 am

1 stop11h 55m

Houston George Bush Intcntl

Sat 6/27

7:24 pm-8:57 pm

1 stop24h 33m

$330

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 10/22

4:13 pm-10:24 am

1 stop19h 11m

Houston George Bush Intcntl

Mon 10/26

12:21 pm-2:33 pm

1 stop25h 12m

$337

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Tue 9/1

5:00 pm-11:02 pm

1 stop7h 02m

Houston George Bush Intcntl

Wed 9/2

1:00 pm-9:34 pm

1 stop7h 34m

$361

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 7/9

6:00 am-11:47 am

1 stop6h 47m

Houston George Bush Intcntl

Tue 8/11

1:00 pm-10:56 pm

1 stop8h 56m

$372

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 Friday. momondo users have found tickets for Friday departures for as low as $331. 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 $422. Try not to purchase tickets in the afternoon because they tend to be around $470. 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
7.9
4,235 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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