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Cheap flights from Islip, New York to Houston from $141

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 7/1. 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
10:57 am - 8:45 am
ISP
-
IAH
22h 48m
1 stop
Frontier Logo
1:29 pm - 9:53 am
IAH
-
ISP
19h 24m
1 stop
$290Frontier
Fri, Jul 17 - Tue, Jul 21
Frontier Logo
10:43 am - 8:45 am
ISP
-
IAH
23h 02m
1 stop
Frontier Logo
7:23 pm - 9:53 am
IAH
-
ISP
13h 30m
1 stop
$331Frontier
Sat, Jul 11 - Fri, Jul 17
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
Frontier Logo
4:41 pm - 6:29 pm
ISP
-
IAH
26h 48m
1 stop
Frontier Logo
7:24 pm - 8:57 pm
IAH
-
ISP
24h 33m
1 stop
$350Frontier
Tue, Jun 23 - Sat, Jun 27
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
Frontier Logo
10:57 am - 6:25 pm
ISP
-
IAH
8h 28m
1 stop
Frontier Logo
7:23 pm - 9:53 am
IAH
-
ISP
13h 30m
1 stop
$374Frontier
Fri, Aug 14 - Sun, Aug 16
Frontier Logo
10:57 am - 7:20 am
ISP
-
IAH
21h 23m
2 stops
Frontier Logo
7:23 pm - 9:53 am
IAH
-
ISP
13h 30m
1 stop
$379Frontier
Fri, Jul 17 - Tue, Jul 21
Frontier Logo
10:57 am - 8:45 am
ISP
-
IAH
22h 48m
1 stop
Frontier Logo
7:23 pm - 9:53 am
IAH
-
ISP
13h 30m
1 stop
$380Frontier
Fri, Jul 10 - Sun, Jul 12
JetBlue Logo
4:58 pm - 11:02 pm
ISP
-
IAH
7h 04m
1 stop
JetBlue Logo
1:00 pm - 9:44 pm
IAH
-
ISP
7h 44m
1 stop
$383JetBlue
Thu, Jul 9 - Tue, Jul 14

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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
Jul 17
ISP10:57 amIslip Long Island
22h 48m
1 stop
IAH8:45 amHouston George Bush Intcntl
Jul 21
IAH1:29 pmHouston George Bush Intcntl
19h 24m
1 stop
ISP9:53 amIslip Long Island
$290
Frontier
Jul 11
ISP10:43 amIslip Long Island
23h 02m
1 stop
IAH8:45 amHouston George Bush Intcntl
Jul 17
IAH7:23 pmHouston George Bush Intcntl
13h 30m
1 stop
ISP9:53 amIslip Long Island
$331
Frontier
Oct 22
ISP4:13 pmIslip Long Island
19h 11m
1 stop
IAH10:24 amHouston George Bush Intcntl
Oct 26
IAH12:21 pmHouston George Bush Intcntl
25h 12m
1 stop
ISP2:33 pmIslip Long Island
$337

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 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 9
ISP4:58 pmIslip Long Island
7h 04m
1 stop
IAH11:02 pmHouston George Bush Intcntl
Jul 14
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 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 June 10, 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 7/17

10:57 am-8:45 am

1 stop22h 48m

Houston George Bush Intcntl

Tue 7/21

1:29 pm-9:53 am

1 stop19h 24m

$290

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 7/11

10:43 am-8:45 am

1 stop23h 02m

Houston George Bush Intcntl

Fri 7/17

7:23 pm-9:53 am

1 stop13h 30m

$331

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 6/23

4:41 pm-6:29 pm

1 stop26h 48m

Houston George Bush Intcntl

Sat 6/27

7:24 pm-8:57 pm

1 stop24h 33m

$350
Quickest round-trip

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

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 8/14

10:57 am-6:25 pm

1 stop8h 28m

Houston George Bush Intcntl

Sun 8/16

7:23 pm-9:53 am

1 stop13h 30m

$374

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 7/17

10:57 am-7:20 am

2 stops21h 23m

Houston George Bush Intcntl

Tue 7/21

7:23 pm-9:53 am

1 stop13h 30m

$379

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 7/10

10:57 am-8:45 am

1 stop22h 48m

Houston George Bush Intcntl

Sun 7/12

7:23 pm-9:53 am

1 stop13h 30m

$380

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 7/9

4:58 pm-11:02 pm

1 stop7h 04m

Houston George Bush Intcntl

Tue 7/14

1:00 pm-9:44 pm

1 stop7h 44m

$383

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 $413. 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 $543.

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 in the evening. Our users have found flights to Houston George Bush Intcntl Airport in the evening for as low as $437. Try not to purchase tickets in the afternoon because they tend to be around $486. 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
Cypress
Montgomery
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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