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Cheap flights from Islip, New York to Houston from $105

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 5/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
4:07 pm - 8:38 am
ISP
-
IAH
17h 31m
1 stop
Frontier Logo
6:57 pm - 9:13 am
IAH
-
ISP
13h 16m
1 stop
$200Frontier
Fri, Apr 17 - Sat, Apr 18
Frontier Logo
4:07 pm - 8:38 am
ISP
-
IAH
17h 31m
1 stop
Frontier Logo
8:06 pm - 9:28 am
IAH
-
ISP
12h 22m
1 stop
$205Frontier
Thu, Apr 23 - Sun, Apr 26
Frontier Logo
8:31 pm - 4:02 pm
ISP
-
IAH
20h 31m
1 stop
Frontier Logo
7:55 pm - 9:13 am
IAH
-
ISP
12h 18m
1 stop
$207Frontier
Sun, Apr 19 - Thu, Apr 23
Frontier Logo
6:02 pm - 6:49 pm
ISP
-
IAH
25h 47m
1 stop
Frontier Logo
7:44 pm - 10:05 am
IAH
-
ISP
13h 21m
1 stop
$210Frontier
Tue, May 26 - Fri, May 29
Frontier Logo
4:07 pm - 5:59 pm
ISP
-
IAH
26h 52m
1 stop
Frontier Logo
7:44 pm - 10:27 am
IAH
-
ISP
13h 43m
1 stop
$250Frontier
Thu, Apr 16 - Wed, May 20
Multiple Airlines Logo
11:00 am - 10:16 pm
ISP
-
IAH
12h 16m
1 stop
Multiple Airlines Logo
8:50 pm - 4:47 pm
IAH
-
ISP
18h 57m
2 stops
$262Multiple Airlines
Fri, May 15 - Mon, May 18
Frontier Logo
11:00 am - 9:00 am
ISP
-
IAH
23h 00m
1 stop
Frontier Logo
7:28 pm - 10:05 am
IAH
-
ISP
13h 37m
1 stop
$270Frontier
Mon, May 18 - Thu, May 21
Frontier Logo
11:00 am - 8:50 am
ISP
-
IAH
22h 50m
1 stop
Frontier Logo
1:29 pm - 10:05 am
IAH
-
ISP
19h 36m
1 stop
$290Frontier
Fri, May 22 - Tue, May 26
Frontier Logo
10:48 am - 6:09 pm
ISP
-
IAH
8h 21m
1 stop
Frontier Logo
1:07 pm - 3:56 pm
IAH
-
ISP
25h 49m
1 stop
$335Frontier
Thu, Aug 6 - Mon, Aug 10
Multiple Airlines Logo
4:07 pm - 8:38 am
ISP
-
IAH
17h 31m
1 stop
Multiple Airlines Logo
7:48 pm - 11:10 am
IAH
-
ISP
38h 22m
2 stops
$347Multiple Airlines
Thu, Apr 16 - Mon, Apr 20

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
Apr 17
ISP4:07 pmIslip Long Island
17h 31m
1 stop
IAH8:38 amHouston George Bush Intcntl
Apr 18
IAH6:57 pmHouston George Bush Intcntl
13h 16m
1 stop
ISP9:13 amIslip Long Island
$200
Frontier
Apr 23
ISP4:07 pmIslip Long Island
17h 31m
1 stop
IAH8:38 amHouston George Bush Intcntl
Apr 26
IAH8:06 pmHouston George Bush Intcntl
12h 22m
1 stop
ISP9:28 amIslip Long Island
$205
Frontier
Apr 19
ISP8:31 pmIslip Long Island
20h 31m
1 stop
IAH4:02 pmHouston George Bush Intcntl
Apr 23
IAH7:55 pmHouston George Bush Intcntl
12h 18m
1 stop
ISP9:13 amIslip Long Island
$207

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 April 5, 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 4/17

4:07 pm-8:38 am

1 stop17h 31m

Houston George Bush Intcntl

Sat 4/18

6:57 pm-9:13 am

1 stop13h 16m

$200
Quickest round-trip

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 4/23

4:07 pm-8:38 am

1 stop17h 31m

Houston George Bush Intcntl

Sun 4/26

8:06 pm-9:28 am

1 stop12h 22m

$205

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 4/19

8:31 pm-4:02 pm

1 stop20h 31m

Houston George Bush Intcntl

Thu 4/23

7:55 pm-9:13 am

1 stop12h 18m

$207

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Tue 5/26

6:02 pm-6:49 pm

1 stop25h 47m

Houston George Bush Intcntl

Fri 5/29

7:44 pm-10:05 am

1 stop13h 21m

$210

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 4/16

4:07 pm-5:59 pm

1 stop26h 52m

Houston George Bush Intcntl

Wed 5/20

7:44 pm-10:27 am

1 stop13h 43m

$250

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 5/15

11:00 am-10:16 pm

1 stop12h 16m

Houston George Bush Intcntl

Mon 5/18

8:50 pm-4:47 pm

2 stops18h 57m

$262

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Mon 5/18

11:00 am-9:00 am

1 stop23h 00m

Houston George Bush Intcntl

Thu 5/21

7:28 pm-10:05 am

1 stop13h 37m

$270

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 5/22

11:00 am-8:50 am

1 stop22h 50m

Houston George Bush Intcntl

Tue 5/26

1:29 pm-10:05 am

1 stop19h 36m

$290

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 8/6

10:48 am-6:09 pm

1 stop8h 21m

Houston George Bush Intcntl

Mon 8/10

1:07 pm-3:56 pm

1 stop25h 49m

$335

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 4/16

4:07 pm-8:38 am

1 stop17h 31m

Houston George Bush Intcntl

Mon 4/20

7:48 pm-11:10 am

2 stops38h 22m

$347

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 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 Friday. Travelers who choose to depart for Houston George Bush Intcntl Airport on a Friday will often find tickets for as low as $357. 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 $472.

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 morning. Our users have found flights to Houston George Bush Intcntl Airport in the morning for as low as $373. Try not to purchase tickets in the afternoon because they tend to be around $415. 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

8h 21m

Direct flights

None
The fastest flight from Islip, New York to Houston George Bush Intcntl Airport takes 8h 21m
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 8h 21m 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
Conroe
Humble
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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