Latest deals
Insights
FAQs
Reviews
Price Alerts

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

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 to Houston

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
mié., nov. 19 - mié., dic. 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
jue., oct. 23 - vie., 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
mié., nov. 19 - mié., dic. 3
Southwest Logo
12:55 pm - 7:45 pmISP-HOU
7h 50m2 stops
Southwest Logo
4:20 pm - 11:50 pmHOU-ISP
6h 30m1 stop
$254Southwest
Find Deal
mié., nov. 5 - jue., nov. 6
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
mié., oct. 15 - mié., 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
Find Deal
sáb., oct. 4 - sáb., oct. 11
Southwest Logo
5:35 pm - 11:45 pmISP-HOU
7h 10m1 stop
Southwest Logo
3:55 pm - 11:45 pmHOU-ISP
6h 50m2 stops
$276Southwest
Find Deal
jue., oct. 23 - vie., oct. 24
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
mié., oct. 15 - mié., oct. 22
Southwest Logo
12:55 pm - 6:15 pmISP-HOU
6h 20m1 stop
Southwest Logo
4:20 pm - 11:50 pmHOU-ISP
6h 30m1 stop
$291Southwest
Find Deal
mié., nov. 5 - jue., nov. 6
Southwest Logo
12:55 pm - 7:45 pmISP-HOU
7h 50m2 stops
Southwest Logo
2:10 pm - 11:50 pmHOU-ISP
8h 40m2 stops
$301Southwest
Find Deal
mié., nov. 5 - jue., nov. 6

Southwest flights from Islip to Houston

Our best Southwest deals on Islip to Houston flight tickets
Southwest
Nov 5
ISP12:55 pmIslip Long Island
7h 50m
2 stops
HOU7:45 pmHouston Hobby
Nov 6
HOU4:20 pmHouston Hobby
6h 30m
1 stop
ISP11:50 pmIslip Long Island
$254
Find similar
Southwest
Oct 23
ISP5:35 pmIslip Long Island
7h 10m
1 stop
HOU11:45 pmHouston Hobby
Oct 24
HOU3:55 pmHouston Hobby
6h 50m
2 stops
ISP11:45 pmIslip Long Island
$276
Find similar
Southwest
Nov 5
ISP12:55 pmIslip Long Island
6h 20m
1 stop
HOU6:15 pmHouston Hobby
Nov 6
HOU4:20 pmHouston Hobby
6h 30m
1 stop
ISP11:50 pmIslip Long Island
$291
Find similar

Frontier flights from Islip to Houston

Our best Frontier deals on Islip to Houston 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 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 septiembre 18, 2025.
Use the filters below to find and compare flights from Islip to Houston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

mié. 11/19

4:58 pm-12:25 am

1 stop8h 27m

Houston George Bush Intcntl

mié. 12/3

8:36 pm-11:00 am

2 stops13h 24m

$236

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

jue. 10/23

9:37 pm-7:04 am

1 stop10h 27m

Houston George Bush Intcntl

vie. 10/24

8:37 pm-10:37 am

1 stop13h 00m

$242

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

mié. 11/19

4:58 pm-12:25 am

1 stop8h 27m

Houston George Bush Intcntl

mié. 12/3

6:30 am-7:14 pm

1 stop11h 44m

$252

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

mié. 11/5

12:55 pm-7:45 pm

2 stops7h 50m

Houston Hobby

jue. 11/6

4:20 pm-11:50 pm

1 stop6h 30m

$254

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

mié. 10/15

8:21 pm-7:03 pm

2 stops23h 42m

Houston George Bush Intcntl

mié. 10/22

8:37 pm-8:42 pm

1 stop23h 05m

$260

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

sáb. 10/4

5:18 pm-4:09 pm

1 stop23h 51m

Houston George Bush Intcntl

sáb. 10/11

8:37 pm-8:52 pm

1 stop23h 15m

$274

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

jue. 10/23

5:35 pm-11:45 pm

1 stop7h 10m

Houston Hobby

vie. 10/24

3:55 pm-11:45 pm

2 stops6h 50m

$276

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

mié. 10/15

4:58 pm-8:33 am

1 stop16h 35m

Houston George Bush Intcntl

mié. 10/22

8:37 pm-8:42 pm

1 stop23h 05m

$276

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

mié. 11/5

12:55 pm-6:15 pm

1 stop6h 20m

Houston Hobby

jue. 11/6

4:20 pm-11:50 pm

1 stop6h 30m

$291

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

mié. 11/5

12:55 pm-7:45 pm

2 stops7h 50m

Houston Hobby

jue. 11/6

2:10 pm-11:50 pm

2 stops8h 40m

$301

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 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 is on a Thursday. momondo users have found tickets for Thursday departures for as low as $322. 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 $447.

What is the cheapest time of day to depart on your flight to Houston?

Our data shows that the cheapest Islip to Houston flights are usually those with departure times at noon. Our users have found flights to Houston at noon for as low as $328. Try not to purchase tickets in the morning because they tend to be around $381. Of course, these prices can vary depending on the time of year and what airport you fly to.

Cheap Islip to Houston flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip to Houston

Direct flights

None
There are no direct flights from Islip to Houston. There are no popular flight routes from Islip to Houston.
Search flight deals

  • 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 5h 20m 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 to Houston

Compare and see reviews for airlines that fly from Islip to Houston with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $343Free CancellationRating
8.0
4,242 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
sáb. 10/18
sáb. 10/25
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States