How many flights depart from Islip, New York to Houston on average per week?

As of December 2025, there are 4 flights per week flying from Islip, New York to Houston. The most common day of the week flights depart is Mon, with 25% of flights taking off on this day.

What is the cheapest airline that flies from Islip Long Island to Houston?

Frontier and Southwest are the most popular carriers operating from Islip Long Island to Houston

What airlines fly to Houston?

United Airlines, Spirit Airlines and Delta are the top three most popular airlines that fly to Houston from Islip, New York according to our data. United Airlines is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Houston. Keep in mind that there are 7 different airlines that fly to Houston on a routine basis, so you have a few additional options to choose from.

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?

The number of operators available for flights from Islip Long Island Airport to Houston is 1 as of December 2025.

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.

$94 Cheap Flights from Islip to Houston in 2025/26

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Find the cheapest flights from Islip, New York to Houston

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9:43 pm - 7:24 pm

ISP

IAH

22h 41m1 stop

3:00 pm - 6:48 pm

IAH

ISP

26h 48m1 stop

$128Multiple Airlines

Fri, Jan 30 - Wed, Feb 4

9:43 pm - 10:53 pm

ISP

IAH

26h 10m2 stops

3:00 pm - 6:48 pm

IAH

ISP

26h 48m1 stop

$149Multiple Airlines

Fri, Jan 30 - Wed, Feb 4

7:33 pm - 10:28 am

ISP

IAH

15h 55m1 stop

4:35 pm - 6:48 pm

IAH

ISP

25h 13m2 stops

$151Multiple Airlines

Fri, Jan 30 - Wed, Feb 4

8:00 am - 6:39 pm

ISP

IAH

11h 39m1 stop

8:19 pm - 8:55 am

IAH

ISP

11h 36m1 stop

$167Multiple Airlines

Tue, Jan 13 - Sat, Jan 17

9:43 pm - 8:23 pm

ISP

IAH

23h 40m2 stops

6:30 am - 6:48 pm

IAH

ISP

35h 18m2 stops

$171Multiple Airlines

Fri, Jan 30 - Wed, Feb 4

8:00 am - 6:39 pm

ISP

IAH

11h 39m1 stop

7:45 am - 10:46 pm

IAH

ISP

14h 01m2 stops

$178Multiple Airlines

Tue, Jan 13 - Sat, Jan 17

11:41 am - 10:41 pm

ISP

IAH

12h 00m1 stop

9:38 pm - 7:48 am

IAH

ISP

9h 10m1 stop

$181Multiple Airlines

Sat, Feb 21 - Sat, Feb 28

2:01 pm - 9:43 pm

ISP

IAH

8h 42m1 stop

1:47 pm - 1:21 pm

IAH

ISP

22h 34m1 stop

$200Multiple Airlines

Fri, Jan 30 - Sun, Feb 1

3:45 pm - 8:45 pm

ISP

HOU

6h 00m1 stop

6:00 am - 11:55 am

HOU

ISP

4h 55m1 stop

$267Southwest

Wed, Jan 28 - Tue, Feb 3

12:40 pm - 8:45 pm

ISP

HOU

9h 05m1 stop

6:40 am - 4:15 pm

HOU

ISP

8h 35m2 stops

$272Southwest

Wed, Jan 28 - Tue, Feb 3

Southwest flights from Islip, New York to Houston

Our best Southwest deals on Islip, New York to Houston flight tickets

Southwest

Jan 28

ISP3:45 pmIslip Long Island

6h 00m

1 stop

HOU8:45 pmHouston Hobby

Feb 3

HOU6:00 amHouston Hobby

4h 55m

1 stop

ISP11:55 amIslip Long Island

$267

Find similar

Southwest

Jan 28

ISP12:40 pmIslip Long Island

9h 05m

1 stop

HOU8:45 pmHouston Hobby

Feb 3

HOU6:40 amHouston Hobby

8h 35m

2 stops

ISP4:15 pmIslip Long Island

$272

Find similar

Southwest

Jan 28

ISP12:40 pmIslip Long Island

8h 00m

2 stops

HOU7:40 pmHouston Hobby

Feb 3

HOU7:25 amHouston Hobby

7h 50m

2 stops

ISP4:15 pmIslip Long Island

$277

Find similar

Frontier flights from Islip, New York to Houston

Our best Frontier deals on Islip, New York to Houston flight tickets

Frontier

Jan 18

ISP8:45 pmIslip Long Island

20h 22m

1 stop

IAH4:07 pmHouston George Bush Intcntl

Jan 24

IAH8:18 pmHouston George Bush Intcntl

11h 22m

1 stop

ISP8:40 amIslip Long Island

$211

Find similar

Frontier

Mar 9

ISP1:22 pmIslip Long Island

20h 18m

1 stop

IAH8:40 amHouston George Bush Intcntl

Mar 12

IAH3:27 pmHouston George Bush Intcntl

17h 21m

1 stop

ISP9:48 amIslip Long Island

$271

Find similar

Frontier

Jan 29

ISP7:43 pmIslip Long Island

14h 17m

1 stop

IAH9:00 amHouston George Bush Intcntl

Feb 1

IAH6:18 pmHouston George Bush Intcntl

23h 30m

1 stop

ISP6:48 pmIslip Long Island

$351

Find similar

Fly from

Fly to

Route

Depart

Return

Price

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 1/30

9:43 pm-7:24 pm

1 stop22h 41m

Houston George Bush Intcntl

Wed 2/4

3:00 pm-6:48 pm

1 stop26h 48m

$128

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 1/30

9:43 pm-10:53 pm

2 stops26h 10m

Houston George Bush Intcntl

Wed 2/4

3:00 pm-6:48 pm

1 stop26h 48m

$149

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 1/30

7:33 pm-10:28 am

1 stop15h 55m

Houston George Bush Intcntl

Wed 2/4

4:35 pm-6:48 pm

2 stops25h 13m

$151

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Tue 1/13

8:00 am-6:39 pm

1 stop11h 39m

Houston George Bush Intcntl

Sat 1/17

8:19 pm-8:55 am

1 stop11h 36m

$167

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 1/30

9:43 pm-8:23 pm

2 stops23h 40m

Houston George Bush Intcntl

Wed 2/4

6:30 am-6:48 pm

2 stops35h 18m

$171

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Tue 1/13

8:00 am-6:39 pm

1 stop11h 39m

Houston George Bush Intcntl

Sat 1/17

7:45 am-10:46 pm

2 stops14h 01m

$178

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 2/21

11:41 am-10:41 pm

1 stop12h 00m

Houston George Bush Intcntl

Sat 2/28

9:38 pm-7:48 am

1 stop9h 10m

$181

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 1/30

2:01 pm-9:43 pm

1 stop8h 42m

Houston George Bush Intcntl

Sun 2/1

1:47 pm-1:21 pm

1 stop22h 34m

$200

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Wed 1/28

3:45 pm-8:45 pm

1 stop6h 00m

Houston Hobby

Tue 2/3

6:00 am-11:55 am

1 stop4h 55m

$267

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Wed 1/28

12:40 pm-8:45 pm

1 stop9h 05m

Houston Hobby

Tue 2/3

6:40 am-4:15 pm

2 stops8h 35m

$272

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

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 $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 $428.

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 $315. Try not to purchase tickets in the morning because they tend to be around $379. 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	10h 24m
Direct flights	None

The fastest flight from Islip, New York to Houston takes 10h 24m

There are no direct flights from Islip, New York to Houston. There are no popular flight routes from Islip, New York to Houston.

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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 10h 24m 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?
The number of operators available for flights from Islip Long Island Airport to Houston is 1 as of December 2025.
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
Southwest	PriceFrom $343	Free Cancellation	Rating 8.0 4,251 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.