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Cheap flights from Islip to Houston from $131

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 to Houston departing on 10/14. 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
0 bags

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Cheap round-trip flights

Multiple Airlines Logo
4:58 pm - 12:25 amISP-IAH
8h 27m1 stop
Multiple Airlines Logo
8:36 pm - 11:00 amIAH-ISP
13h 24m2 stops
$236Multiple Airlines
Find Deal
Wed, Nov 19 - Wed, Dec 3
Frontier Logo
9:37 pm - 7:04 amISP-IAH
10h 27m1 stop
Frontier Logo
8:37 pm - 10:37 amIAH-ISP
13h 00m1 stop
$242Frontier
Find Deal
Thu, Oct 23 - Fri, Oct 24
Multiple Airlines Logo
4:58 pm - 12:25 amISP-IAH
8h 27m1 stop
Multiple Airlines Logo
6:30 am - 7:14 pmIAH-ISP
11h 44m1 stop
$252Multiple Airlines
Find Deal
Wed, Nov 19 - Wed, Dec 3
Multiple Airlines Logo
8:21 pm - 7:03 pmISP-IAH
23h 42m2 stops
Multiple Airlines Logo
8:37 pm - 8:42 pmIAH-ISP
23h 05m1 stop
$260Multiple Airlines
Find Deal
Wed, Oct 15 - Wed, Oct 22
Frontier Logo
5:18 pm - 4:09 pmISP-IAH
23h 51m1 stop
Frontier Logo
8:37 pm - 8:52 pmIAH-ISP
23h 15m1 stop
$274Frontier
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Sat, Oct 4 - Sat, Oct 11
Multiple Airlines Logo
4:58 pm - 8:33 amISP-IAH
16h 35m1 stop
Multiple Airlines Logo
8:37 pm - 8:42 pmIAH-ISP
23h 05m1 stop
$276Multiple Airlines
Find Deal
Wed, Oct 15 - Wed, Oct 22
Frontier Logo
9:37 pm - 7:04 amISP-IAH
10h 27m1 stop
Frontier Logo
12:39 pm - 10:37 amIAH-ISP
20h 58m2 stops
$284Frontier
Find Deal
Thu, Oct 23 - Fri, Oct 24
Frontier Logo
9:47 pm - 7:04 amISP-IAH
10h 17m1 stop
Frontier Logo
7:57 pm - 9:04 amIAH-ISP
12h 07m1 stop
$295Frontier
Find Deal
Sun, Oct 12 - Sun, Oct 19
Multiple Airlines Logo
5:05 pm - 10:44 amISP-IAH
18h 39m2 stops
Multiple Airlines Logo
5:25 am - 8:42 pmIAH-ISP
14h 17m1 stop
$298Multiple Airlines
Find Deal
Sat, Oct 4 - Tue, Oct 7
Multiple Airlines Logo
10:02 am - 6:23 pmISP-IAH
9h 21m1 stop
Multiple Airlines Logo
8:36 pm - 11:00 amIAH-ISP
13h 24m2 stops
$307Multiple Airlines
Find Deal
Thu, Nov 20 - Wed, Dec 3

Frontier flights from Islip to Houston George Bush Intcntl Airport

Our best Frontier deals on Islip to Houston George Bush Intcntl Airport flight tickets
Frontier
Oct 23
ISP9:37 pmIslip Long Island
10h 27m
1 stop
IAH7:04 amHouston George Bush Intcntl
Oct 24
IAH8:37 pmHouston George Bush Intcntl
13h 00m
1 stop
ISP10:37 amIslip Long Island
$242
Find similar
Frontier
Oct 4
ISP5:18 pmIslip Long Island
23h 51m
1 stop
IAH4:09 pmHouston George Bush Intcntl
Oct 11
IAH8:37 pmHouston George Bush Intcntl
23h 15m
1 stop
ISP8:52 pmIslip Long Island
$274
Find similar
Frontier
Oct 23
ISP9:37 pmIslip Long Island
10h 27m
1 stop
IAH7:04 amHouston George Bush Intcntl
Oct 24
IAH12:39 pmHouston George Bush Intcntl
20h 58m
2 stops
ISP10:37 amIslip Long Island
$284
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Islip 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 September 18, 2025.
Use the filters below to find and compare flights from Islip to Houston George Bush Intcntl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 11/19

4:58 pm-12:25 am

1 stop8h 27m

Houston George Bush Intcntl

Wed 12/3

8:36 pm-11:00 am

2 stops13h 24m

$236

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 10/23

9:37 pm-7:04 am

1 stop10h 27m

Houston George Bush Intcntl

Fri 10/24

8:37 pm-10:37 am

1 stop13h 00m

$242

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 11/19

4:58 pm-12:25 am

1 stop8h 27m

Houston George Bush Intcntl

Wed 12/3

6:30 am-7:14 pm

1 stop11h 44m

$252

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 10/15

8:21 pm-7:03 pm

2 stops23h 42m

Houston George Bush Intcntl

Wed 10/22

8:37 pm-8:42 pm

1 stop23h 05m

$260

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 10/4

5:18 pm-4:09 pm

1 stop23h 51m

Houston George Bush Intcntl

Sat 10/11

8:37 pm-8:52 pm

1 stop23h 15m

$274

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 10/15

4:58 pm-8:33 am

1 stop16h 35m

Houston George Bush Intcntl

Wed 10/22

8:37 pm-8:42 pm

1 stop23h 05m

$276

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 10/23

9:37 pm-7:04 am

1 stop10h 27m

Houston George Bush Intcntl

Fri 10/24

12:39 pm-10:37 am

2 stops20h 58m

$284

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 10/12

9:47 pm-7:04 am

1 stop10h 17m

Houston George Bush Intcntl

Sun 10/19

7:57 pm-9:04 am

1 stop12h 07m

$295

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 10/4

5:05 pm-10:44 am

2 stops18h 39m

Houston George Bush Intcntl

Tue 10/7

5:25 am-8:42 pm

1 stop14h 17m

$298

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 11/20

10:02 am-6:23 pm

1 stop9h 21m

Houston George Bush Intcntl

Wed 12/3

8:36 pm-11:00 am

2 stops13h 24m

$307

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 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 to Houston George Bush Intcntl Airport is on a Friday. Travelers who choose to depart for Houston George Bush Intcntl Airport on a Friday will often find tickets for as low as $346. 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 George Bush Intcntl Airport on Sunday is $452.

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 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 $323. Try not to purchase tickets in the morning because they tend to be around $382. Of course, these prices can vary depending on the time of year and what airport you fly to.

When to book flights from Islip to Houston George Bush Intcntl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Islip 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 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 to Houston George Bush Intcntl Airport

Direct flights

None
There are no direct flights from Islip to Houston George Bush Intcntl Airport. There are no popular flight routes from Islip to Houston George Bush Intcntl Airport.
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  • 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 7h 44m 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
The Woodlands
Katy
Conroe
Humble
Cypress
Spring
Montgomery
Tomball
Livingston
Jersey Village

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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