Latest deals
Insights
FAQs
Reviews
Price Alerts

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 6/24. 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

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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
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
$304Frontier
Fri, Jun 26 - Sat, Jun 27
Southwest Logo
6:00 am - 4:30 pm
ISP
-
HOU
11h 30m
1 stop
Southwest Logo
3:55 pm - 10:40 pm
HOU
-
ISP
5h 45m
1 stop
$325Southwest
Wed, Jul 15 - Wed, Jul 22
Frontier Logo
9:52 pm - 8:47 am
ISP
-
IAH
11h 55m
1 stop
Frontier Logo
1:07 pm - 8:57 pm
IAH
-
ISP
6h 50m
1 stop
$330Frontier
Wed, Jun 17 - Mon, Jun 29
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
$331Frontier
Sun, Jun 21 - Thu, Jun 25
Southwest Logo
5:30 am - 1:55 pm
ISP
-
HOU
9h 25m
2 stops
Southwest Logo
10:30 am - 6:45 pm
HOU
-
ISP
7h 15m
2 stops
$340Southwest
Sat, Aug 8 - Sun, Aug 16
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
$340Frontier
Sun, Jun 14 - Tue, Jun 16
Southwest Logo
5:30 am - 1:55 pm
ISP
-
HOU
9h 25m
2 stops
Southwest Logo
5:15 am - 3:55 pm
HOU
-
ISP
9h 40m
1 stop
$353Southwest
Sat, Aug 8 - Sun, Aug 16
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
$359Frontier
Tue, Jun 23 - Sun, Jun 28
Frontier Logo
4:13 pm - 10:24 am
ISP
-
IAH
19h 11m
1 stop
Frontier Logo
5:09 pm - 2:33 pm
IAH
-
ISP
20h 24m
1 stop
$360Frontier
Sat, Oct 24 - Mon, Oct 26
JetBlue Logo
6:00 am - 3:47 pm
ISP
-
IAH
10h 47m
1 stop
JetBlue Logo
1:00 pm - 9:44 pm
IAH
-
ISP
7h 44m
1 stop
$363JetBlue
Wed, Jul 15 - Wed, Jul 22

Southwest flights from Islip, New York to Houston

Our best Southwest deals on Islip, New York to Houston flight tickets
Southwest
Jul 15
ISP6:00 amIslip Long Island
11h 30m
1 stop
HOU4:30 pmHouston Hobby
Jul 22
HOU3:55 pmHouston Hobby
5h 45m
1 stop
ISP10:40 pmIslip Long Island
$325
Southwest
Aug 8
ISP5:30 amIslip Long Island
9h 25m
2 stops
HOU1:55 pmHouston Hobby
Aug 16
HOU10:30 amHouston Hobby
7h 15m
2 stops
ISP6:45 pmIslip Long Island
$340
Southwest
Aug 8
ISP5:30 amIslip Long Island
9h 25m
2 stops
HOU1:55 pmHouston Hobby
Aug 16
HOU5:15 amHouston Hobby
9h 40m
1 stop
ISP3:55 pmIslip Long Island
$353

Frontier flights from Islip, New York to Houston

Our best Frontier deals on Islip, New York to Houston flight tickets
Frontier
Jun 26
ISP9:52 pmIslip Long Island
11h 55m
1 stop
IAH8:47 amHouston George Bush Intcntl
Jun 27
IAH7:24 pmHouston George Bush Intcntl
24h 33m
1 stop
ISP8:57 pmIslip Long Island
$304
Frontier
Jun 17
ISP9:52 pmIslip Long Island
11h 55m
1 stop
IAH8:47 amHouston George Bush Intcntl
Jun 29
IAH1:07 pmHouston George Bush Intcntl
6h 50m
1 stop
ISP8:57 pmIslip Long Island
$330
Frontier
Jun 21
ISP9:52 pmIslip Long Island
11h 55m
1 stop
IAH8:47 amHouston George Bush Intcntl
Jun 25
IAH7:24 pmHouston George Bush Intcntl
24h 33m
1 stop
ISP8:57 pmIslip Long Island
$331

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 4, 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

Fri 6/26

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

$304

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Wed 7/15

6:00 am-4:30 pm

1 stop11h 30m

Houston Hobby

Wed 7/22

3:55 pm-10:40 pm

1 stop5h 45m

$325

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 6/17

9:52 pm-8:47 am

1 stop11h 55m

Houston George Bush Intcntl

Mon 6/29

1:07 pm-8:57 pm

1 stop6h 50m

$330

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 6/21

9:52 pm-8:47 am

1 stop11h 55m

Houston George Bush Intcntl

Thu 6/25

7:24 pm-8:57 pm

1 stop24h 33m

$331
Quickest round-trip

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Sat 8/8

5:30 am-1:55 pm

2 stops9h 25m

Houston Hobby

Sun 8/16

10:30 am-6:45 pm

2 stops7h 15m

$340

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 6/14

9:52 pm-8:47 am

1 stop11h 55m

Houston George Bush Intcntl

Tue 6/16

7:24 pm-8:57 pm

1 stop24h 33m

$340

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Sat 8/8

5:30 am-1:55 pm

2 stops9h 25m

Houston Hobby

Sun 8/16

5:15 am-3:55 pm

1 stop9h 40m

$353

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Tue 6/23

4:41 pm-6:29 pm

1 stop26h 48m

Houston George Bush Intcntl

Sun 6/28

7:24 pm-8:57 pm

1 stop24h 33m

$359

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 10/24

4:13 pm-10:24 am

1 stop19h 11m

Houston George Bush Intcntl

Mon 10/26

5:09 pm-2:33 pm

1 stop20h 24m

$360

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 7/15

6:00 am-3:47 pm

1 stop10h 47m

Houston George Bush Intcntl

Wed 7/22

1:00 pm-9:44 pm

1 stop7h 44m

$363

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Houston from

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 Thursday. momondo users have found tickets for Thursday departures for as low as $332. 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 $449.

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 $420. Try not to purchase tickets in the afternoon because they tend to be around $468. 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
8.0
4,256 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.

An easier way to manage your Houston trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 7/4
Sat 7/11
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States