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 41% 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.

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

Frontier is the most popular carrier operating from Islip Long Island to Houston

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 January 2026.

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 2026

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Find the cheapest flights from Islip, New York to Houston

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

8:23 pm - 7:55 am

ISP

IAH

12h 32m1 stop

8:18 pm - 8:40 am

IAH

ISP

11h 22m1 stop

$129Frontier

Sat, Feb 21 - Tue, Feb 24

9:33 am - 7:04 pm

ISP

IAH

10h 31m1 stop

8:18 pm - 7:38 am

IAH

ISP

10h 20m1 stop

$169Frontier

Wed, Feb 25 - Sun, Mar 1

8:21 pm - 7:00 am

ISP

IAH

11h 39m1 stop

8:18 pm - 7:38 am

IAH

ISP

10h 20m1 stop

$190Frontier

Sun, Feb 22 - Thu, Feb 26

9:25 am - 9:00 am

ISP

IAH

24h 35m1 stop

8:18 pm - 8:47 pm

IAH

ISP

23h 29m1 stop

$199Frontier

Sun, Jan 25 - Thu, Jan 29

3:34 pm - 6:28 pm

ISP

IAH

27h 54m1 stop

8:18 pm - 7:38 am

IAH

ISP

10h 20m1 stop

$211Frontier

Thu, Feb 19 - Sun, Feb 22

7:53 pm - 8:40 am

ISP

IAH

37h 47m2 stops

5:27 pm - 8:47 pm

IAH

ISP

26h 20m1 stop

$216Multiple Airlines

Sun, Jan 25 - Thu, Jan 29

9:15 am - 3:45 pm

ISP

HOU

7h 30m1 stop

3:45 pm - 9:55 pm

HOU

ISP

5h 10m1 stop

$304Southwest

Tue, Feb 3 - Tue, Feb 10

9:15 am - 3:45 pm

ISP

HOU

7h 30m1 stop

7:25 am - 4:15 pm

HOU

ISP

7h 50m2 stops

$309Southwest

Tue, Feb 3 - Tue, Feb 10

12:40 pm - 7:40 pm

ISP

HOU

8h 00m2 stops

12:30 pm - 9:55 pm

HOU

ISP

8h 25m2 stops

$315Southwest

Tue, Feb 3 - Tue, Feb 10

6:00 am - 12:45 pm

ISP

HOU

7h 45m1 stop

3:10 pm - 10:30 pm

HOU

ISP

6h 20m1 stop

$333Southwest

Thu, May 7 - Mon, May 11

Southwest flights from Islip, New York to Houston

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

Southwest

Feb 3

ISP9:15 amIslip Long Island

7h 30m

1 stop

HOU3:45 pmHouston Hobby

Feb 10

HOU3:45 pmHouston Hobby

5h 10m

1 stop

ISP9:55 pmIslip Long Island

$304

Southwest

Feb 3

ISP9:15 amIslip Long Island

7h 30m

1 stop

HOU3:45 pmHouston Hobby

Feb 10

HOU7:25 amHouston Hobby

7h 50m

2 stops

ISP4:15 pmIslip Long Island

$309

Southwest

Feb 3

ISP12:40 pmIslip Long Island

8h 00m

2 stops

HOU7:40 pmHouston Hobby

Feb 10

HOU12:30 pmHouston Hobby

8h 25m

2 stops

ISP9:55 pmIslip Long Island

$315

Frontier flights from Islip, New York to Houston

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

Frontier

Feb 21

ISP8:23 pmIslip Long Island

12h 32m

1 stop

IAH7:55 amHouston George Bush Intcntl

Feb 24

IAH8:18 pmHouston George Bush Intcntl

11h 22m

1 stop

ISP8:40 amIslip Long Island

$129

Frontier

Feb 25

ISP9:33 amIslip Long Island

10h 31m

1 stop

IAH7:04 pmHouston George Bush Intcntl

Mar 1

IAH8:18 pmHouston George Bush Intcntl

10h 20m

1 stop

ISP7:38 amIslip Long Island

$169

Frontier

Feb 22

ISP8:21 pmIslip Long Island

11h 39m

1 stop

IAH7:00 amHouston George Bush Intcntl

Feb 26

IAH8:18 pmHouston George Bush Intcntl

10h 20m

1 stop

ISP7:38 amIslip Long Island

$190

Fly from

Fly to

Route

Depart

Return

Price

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 2/21

8:23 pm-7:55 am

1 stop12h 32m

Houston George Bush Intcntl

Tue 2/24

8:18 pm-8:40 am

1 stop11h 22m

$129

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 2/25

9:33 am-7:04 pm

1 stop10h 31m

Houston George Bush Intcntl

Sun 3/1

8:18 pm-7:38 am

1 stop10h 20m

$169

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 2/22

8:21 pm-7:00 am

1 stop11h 39m

Houston George Bush Intcntl

Thu 2/26

8:18 pm-7:38 am

1 stop10h 20m

$190

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 1/25

9:25 am-9:00 am

1 stop24h 35m

Houston George Bush Intcntl

Thu 1/29

8:18 pm-8:47 pm

1 stop23h 29m

$199

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 2/19

3:34 pm-6:28 pm

1 stop27h 54m

Houston George Bush Intcntl

Sun 2/22

8:18 pm-7:38 am

1 stop10h 20m

$211

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 1/25

7:53 pm-8:40 am

2 stops37h 47m

Houston George Bush Intcntl

Thu 1/29

5:27 pm-8:47 pm

1 stop26h 20m

$216

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Tue 2/3

9:15 am-3:45 pm

1 stop7h 30m

Houston Hobby

Tue 2/10

3:45 pm-9:55 pm

1 stop5h 10m

$304

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Tue 2/3

9:15 am-3:45 pm

1 stop7h 30m

Houston Hobby

Tue 2/10

7:25 am-4:15 pm

2 stops7h 50m

$309

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Tue 2/3

12:40 pm-7:40 pm

2 stops8h 00m

Houston Hobby

Tue 2/10

12:30 pm-9:55 pm

2 stops8h 25m

$315

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Thu 5/7

6:00 am-12:45 pm

1 stop7h 45m

Houston Hobby

Mon 5/11

3:10 pm-10:30 pm

1 stop6h 20m

$333

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 $327. 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 $454.

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 $318. Try not to purchase tickets in the morning because they tend to be around $378. 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 00m
Direct flights	None

The fastest flight from Islip, New York to Houston takes 7h 00m

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 00m 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 January 2026.
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 $266	Free Cancellation	Rating 8.0 4,252 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.