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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 - 2:32 pm
ISP
-
IAH
20h 23m
1 stop
Frontier Logo
3:25 pm - 6:14 pm
IAH
-
ISP
25h 49m
1 stop
$242Frontier
Fri, Aug 21 - Sun, Aug 23
Frontier Logo
7:09 pm - 8:02 am
ISP
-
IAH
13h 53m
1 stop
Frontier Logo
1:45 pm - 9:53 am
IAH
-
ISP
19h 08m
1 stop
$246Frontier
Sat, Aug 22 - Sat, Aug 29
Frontier Logo
7:09 pm - 8:02 am
ISP
-
IAH
13h 53m
1 stop
Frontier Logo
1:45 pm - 9:53 am
IAH
-
ISP
19h 08m
1 stop
$252Frontier
Sat, Aug 22 - Sat, Aug 29
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
$270Frontier
Thu, Aug 20 - Fri, Aug 21
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
Multiple Airlines Logo
12:00 pm - 10:06 pm
ISP
-
IAH
11h 06m
2 stops
Multiple Airlines Logo
4:39 pm - 9:33 am
IAH
-
ISP
15h 54m
1 stop
$283Multiple Airlines
Sat, Sep 19 - Mon, Sep 21
Multiple Airlines Logo
11:57 am - 10:14 pm
ISP
-
IAH
11h 17m
2 stops
Multiple Airlines Logo
1:45 pm - 9:53 am
IAH
-
ISP
19h 08m
1 stop
$329Multiple Airlines
Sat, Aug 22 - Sat, Aug 29
Multiple Airlines Logo
11:57 am - 10:14 pm
ISP
-
IAH
11h 17m
2 stops
Multiple Airlines Logo
1:45 pm - 9:53 am
IAH
-
ISP
19h 08m
1 stop
$337Multiple Airlines
Sat, Aug 22 - Sat, Aug 29
Multiple Airlines Logo
2:28 pm - 12:10 pm
ISP
-
IAH
22h 42m
1 stop
Multiple Airlines Logo
1:45 pm - 9:53 am
IAH
-
ISP
19h 08m
1 stop
$349Multiple Airlines
Fri, Aug 14 - Tue, Aug 18
Multiple Airlines Logo
2:28 pm - 11:27 am
ISP
-
IAH
21h 59m
2 stops
Multiple Airlines Logo
1:45 pm - 9:53 am
IAH
-
ISP
19h 08m
1 stop
$353Multiple Airlines
Fri, Aug 14 - Tue, Aug 18

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Frontier flights from Islip, New York to Houston George Bush Intcntl Airport

Our best Frontier deals on Islip, New York to Houston George Bush Intcntl Airport flight tickets
Frontier
Aug 21
ISP7:09 pmIslip Long Island
20h 23m
1 stop
IAH2:32 pmHouston George Bush Intcntl
Aug 23
IAH3:25 pmHouston George Bush Intcntl
25h 49m
1 stop
ISP6:14 pmIslip Long Island
$242
Frontier
Aug 22
ISP7:09 pmIslip Long Island
13h 53m
1 stop
IAH8:02 amHouston George Bush Intcntl
Aug 29
IAH1:45 pmHouston George Bush Intcntl
19h 08m
1 stop
ISP9:53 amIslip Long Island
$246
Frontier
Aug 22
ISP7:09 pmIslip Long Island
13h 53m
1 stop
IAH8:02 amHouston George Bush Intcntl
Aug 29
IAH1:45 pmHouston George Bush Intcntl
19h 08m
1 stop
ISP9:53 amIslip Long Island
$252

JetBlue flights from Islip, New York to Houston George Bush Intcntl Airport

Our best JetBlue deals on Islip, New York to Houston George Bush Intcntl Airport flight tickets
JetBlue
Sep 5
ISP6:00 amIslip Long Island
6h 47m
1 stop
IAH11:47 amHouston George Bush Intcntl
Sep 8
IAH1:00 pmHouston George Bush Intcntl
7h 49m
1 stop
ISP9:49 pmIslip Long Island
$377
JetBlue
Sep 7
ISP6:00 amIslip Long Island
6h 47m
1 stop
IAH11:47 amHouston George Bush Intcntl
Sep 11
IAH12:58 pmHouston George Bush Intcntl
9h 24m
1 stop
ISP11:22 pmIslip Long Island
$394
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

momondo Fare Finder

 
Customize your flight search to find flights from Islip, New York to Houston George Bush Intcntl Airport 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 24, 2026.
Use the filters below to find and compare flights from Islip, New York to Houston George Bush Intcntl Airport 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-2:32 pm

1 stop20h 23m

Houston George Bush Intcntl

Sun 8/23

3:25 pm-6:14 pm

1 stop25h 49m

$242

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 8/22

7:09 pm-8:02 am

1 stop13h 53m

Houston George Bush Intcntl

Sat 8/29

1:45 pm-9:53 am

1 stop19h 08m

$246

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 8/22

7:09 pm-8:02 am

1 stop13h 53m

Houston George Bush Intcntl

Sat 8/29

1:45 pm-9:53 am

1 stop19h 08m

$252

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 8/20

7:09 pm-8:02 am

1 stop13h 53m

Houston George Bush Intcntl

Fri 8/21

3:25 pm-9:53 am

1 stop17h 28m

$270
Quickest round-trip

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 - IAH

ISPIAH

Islip Long Island

Sat 9/19

12:00 pm-10:06 pm

2 stops11h 06m

Houston George Bush Intcntl

Mon 9/21

4:39 pm-9:33 am

1 stop15h 54m

$283

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 8/22

11:57 am-10:14 pm

2 stops11h 17m

Houston George Bush Intcntl

Sat 8/29

1:45 pm-9:53 am

1 stop19h 08m

$329

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 8/22

11:57 am-10:14 pm

2 stops11h 17m

Houston George Bush Intcntl

Sat 8/29

1:45 pm-9:53 am

1 stop19h 08m

$337

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 8/14

2:28 pm-12:10 pm

1 stop22h 42m

Houston George Bush Intcntl

Tue 8/18

1:45 pm-9:53 am

1 stop19h 08m

$349

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 8/14

2:28 pm-11:27 am

2 stops21h 59m

Houston George Bush Intcntl

Tue 8/18

1:45 pm-9:53 am

1 stop19h 08m

$353

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 George Bush Intcntl Airport

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 George Bush Intcntl Airport?

The cheapest day to depart from Islip, New York to Houston George Bush Intcntl Airport is on a Wednesday. Travelers who choose to depart for Houston George Bush Intcntl Airport on a Wednesday will often find tickets for as low as $420. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Houston George Bush Intcntl Airport on Monday is $556.

What is the cheapest time of day to depart on your flight to Houston George Bush Intcntl Airport?

Our data shows that the cheapest Islip, New York to Houston George Bush Intcntl Airport flights are usually those with departure times at noon. Our users have found flights to Houston George Bush Intcntl Airport at noon for as low as $442. Try not to purchase tickets in the afternoon because they tend to be around $492. Of course, these prices can vary depending on the time of year and what airport you fly to.

When to book flights from Islip, New York to Houston George Bush Intcntl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Islip, New York to Houston George Bush Intcntl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Islip, New York to Houston George Bush Intcntl Airport (ISP to IAH) flight deals and tips

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

Fastest flight time

6h 47m

Direct flights

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

Frequently asked questions about flying from Islip, New York to Houston George Bush Intcntl Airport

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

    There are 1444.1 mi between Islip Long Island and Houston George Bush Intcntl. 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 George Bush Intcntl Airport?

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Islip Long Island Airport to Houston George Bush Intcntl Airport.

  • What documentation or ID do you need to fly to Houston George Bush Intcntl Airport?

    The required travel and health documents for your Houston George Bush Intcntl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Houston George Bush Intcntl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near Houston?

Book flights to Houston if you plan to visit one of these locations
Katy
The Woodlands
Humble
Conroe
Spring
Montgomery
Cypress
Jersey Village
Tomball
Livingston

Why use momondo?

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

Finding the right flight to Houston from Islip is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Houston quick and easy, saving you time and money.

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

Yes. All flights to Houston from Islip on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Houston from Islip.

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

Yes momondo offers price alerts on flights to Houston from Islip. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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