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 43% 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.

$65 Cheap Flights from Islip to Houston in 2025/26

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Find the cheapest flights from Islip, New York to Houston

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:03 pm - 7:55 am

ISP

IAH

18h 52m1 stop

8:18 pm - 7:48 am

IAH

ISP

10h 30m1 stop

$129Frontier

Wed, Feb 25 - Sat, Feb 28

8:40 pm - 11:11 am

ISP

IAH

15h 31m1 stop

8:13 pm - 7:51 pm

IAH

ISP

22h 38m1 stop

$167Multiple Airlines

Thu, Jan 8 - Sun, Jan 11

7:58 pm - 2:57 pm

ISP

IAH

19h 59m1 stop

8:18 pm - 8:47 pm

IAH

ISP

23h 29m1 stop

$183Frontier

Thu, Jan 15 - Thu, Jan 22

8:40 pm - 10:33 am

ISP

IAH

14h 53m2 stops

8:13 pm - 7:51 pm

IAH

ISP

22h 38m1 stop

$197Multiple Airlines

Thu, Jan 8 - Sun, Jan 11

8:00 am - 6:39 pm

ISP

IAH

11h 39m1 stop

6:00 am - 11:59 am

IAH

ISP

28h 59m2 stops

$212Multiple Airlines

Tue, Jan 13 - Mon, Jan 19

8:33 am - 6:28 pm

ISP

IAH

10h 55m1 stop

7:45 am - 2:39 pm

IAH

ISP

5h 54m1 stop

$217Frontier

Fri, Feb 27 - Mon, Mar 2

3:45 pm - 8:45 pm

ISP

HOU

6h 00m1 stop

6:00 am - 11:55 am

HOU

ISP

4h 55m1 stop

$321Southwest

Tue, Jan 13 - Mon, Jan 19

12:40 pm - 7:45 pm

ISP

HOU

8h 05m2 stops

6:00 am - 11:55 am

HOU

ISP

4h 55m1 stop

$326Southwest

Tue, Jan 13 - Mon, Jan 19

12:40 pm - 8:45 pm

ISP

HOU

9h 05m1 stop

6:00 am - 11:55 am

HOU

ISP

4h 55m1 stop

$331Southwest

Thu, Jan 8 - Sun, Jan 11

12:40 pm - 7:45 pm

ISP

HOU

8h 05m2 stops

6:00 am - 11:55 am

HOU

ISP

4h 55m1 stop

$336Southwest

Thu, Jan 8 - Sun, Jan 11

Southwest flights from Islip, New York to Houston

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

Southwest

Jan 13

ISP3:45 pmIslip Long Island

6h 00m

1 stop

HOU8:45 pmHouston Hobby

Jan 19

HOU6:00 amHouston Hobby

4h 55m

1 stop

ISP11:55 amIslip Long Island

$321

Find similar

Southwest

Jan 13

ISP12:40 pmIslip Long Island

8h 05m

2 stops

HOU7:45 pmHouston Hobby

Jan 19

HOU6:00 amHouston Hobby

4h 55m

1 stop

ISP11:55 amIslip Long Island

$326

Find similar

Southwest

Jan 8

ISP12:40 pmIslip Long Island

9h 05m

1 stop

HOU8:45 pmHouston Hobby

Jan 11

HOU6:00 amHouston Hobby

4h 55m

1 stop

ISP11:55 amIslip Long Island

$331

Find similar

Frontier flights from Islip, New York to Houston

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

Frontier

Feb 25

ISP2:03 pmIslip Long Island

18h 52m

1 stop

IAH7:55 amHouston George Bush Intcntl

Feb 28

IAH8:18 pmHouston George Bush Intcntl

10h 30m

1 stop

ISP7:48 amIslip Long Island

$129

Find similar

Frontier

Jan 17

ISP6:47 pmIslip Long Island

22h 20m

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

$175

Find similar

Frontier

Jan 15

ISP7:58 pmIslip Long Island

19h 59m

1 stop

IAH2:57 pmHouston George Bush Intcntl

Jan 22

IAH8:18 pmHouston George Bush Intcntl

23h 29m

1 stop

ISP8:47 pmIslip Long Island

$183

Find similar

Fly from

Fly to

Route

Depart

Return

Price

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 2/25

2:03 pm-7:55 am

1 stop18h 52m

Houston George Bush Intcntl

Sat 2/28

8:18 pm-7:48 am

1 stop10h 30m

$129

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 1/8

8:40 pm-11:11 am

1 stop15h 31m

Houston George Bush Intcntl

Sun 1/11

8:13 pm-7:51 pm

1 stop22h 38m

$167

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 1/15

7:58 pm-2:57 pm

1 stop19h 59m

Houston George Bush Intcntl

Thu 1/22

8:18 pm-8:47 pm

1 stop23h 29m

$183

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 1/8

8:40 pm-10:33 am

2 stops14h 53m

Houston George Bush Intcntl

Sun 1/11

8:13 pm-7:51 pm

1 stop22h 38m

$197

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Tue 1/13

8:00 am-6:39 pm

1 stop11h 39m

Houston George Bush Intcntl

Mon 1/19

6:00 am-11:59 am

2 stops28h 59m

$212

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 2/27

8:33 am-6:28 pm

1 stop10h 55m

Houston George Bush Intcntl

Mon 3/2

7:45 am-2:39 pm

1 stop5h 54m

$217

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Tue 1/13

3:45 pm-8:45 pm

1 stop6h 00m

Houston Hobby

Mon 1/19

6:00 am-11:55 am

1 stop4h 55m

$321

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Tue 1/13

12:40 pm-7:45 pm

2 stops8h 05m

Houston Hobby

Mon 1/19

6:00 am-11:55 am

1 stop4h 55m

$326

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Thu 1/8

12:40 pm-8:45 pm

1 stop9h 05m

Houston Hobby

Sun 1/11

6:00 am-11:55 am

1 stop4h 55m

$331

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Thu 1/8

12:40 pm-7:45 pm

2 stops8h 05m

Houston Hobby

Sun 1/11

6:00 am-11:55 am

1 stop4h 55m

$336

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

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 $325. 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 $436.

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 $316. Try not to purchase tickets in the morning because they tend to be around $380. 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	7h 20m
Direct flights	None

The fastest flight from Islip, New York to Houston takes 7h 20m

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

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 7h 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?
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 7.9 4,250 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.