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 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.

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

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:41 am - 7:55 am

ISP

IAH

21h 14m

1 stop

11:12 am - 7:48 am

IAH

ISP

19h 36m

1 stop

$129Frontier

Sat, Feb 21 - Sat, Feb 28

7:43 pm - 5:10 pm

ISP

IAH

22h 27m

1 stop

8:18 pm - 7:48 am

IAH

ISP

10h 30m

1 stop

$180Frontier

Thu, Feb 5 - Sat, Feb 14

8:23 pm - 7:55 am

ISP

IAH

12h 32m

1 stop

8:18 pm - 7:38 am

IAH

ISP

10h 20m

1 stop

$189Frontier

Sat, Feb 28 - Sun, Mar 1

7:43 pm - 9:57 pm

ISP

IAH

27h 14m

1 stop

8:18 pm - 8:47 pm

IAH

ISP

23h 29m

1 stop

$201Frontier

Mon, Feb 2 - Thu, Feb 5

8:21 pm - 7:00 am

ISP

IAH

11h 39m

1 stop

8:18 pm - 7:38 am

IAH

ISP

10h 20m

1 stop

$215Frontier

Sun, Feb 22 - Thu, Feb 26

10:58 am - 8:08 pm

ISP

IAH

10h 10m

1 stop

9:15 pm - 12:47 pm

IAH

ISP

14h 32m

1 stop

$228Frontier

Mon, Mar 9 - Thu, Mar 19

3:34 pm - 6:28 pm

ISP

IAH

27h 54m

1 stop

8:18 pm - 7:38 am

IAH

ISP

10h 20m

1 stop

$236Frontier

Thu, Feb 26 - Sun, Mar 1

9:33 am - 7:04 pm

ISP

IAH

10h 31m

1 stop

7:59 pm - 8:40 am

IAH

ISP

11h 41m

1 stop

$241Frontier

Wed, Feb 25 - Tue, Mar 3

5:15 pm - 12:15 am

ISP

HOU

8h 00m

1 stop

10:10 am - 5:20 pm

HOU

ISP

6h 10m

1 stop

$365Southwest

Fri, Mar 27 - Sat, Apr 4

5:55 pm - 11:40 pm

ISP

HOU

6h 45m

1 stop

3:05 pm - 11:55 pm

HOU

ISP

7h 50m

2 stops

$374Southwest

Fri, Mar 20 - Mon, Mar 23

Southwest flights from Islip, New York to Houston

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

Southwest

Mar 27

ISP5:15 pmIslip Long Island

8h 00m

1 stop

HOU12:15 amHouston Hobby

Apr 4

HOU10:10 amHouston Hobby

6h 10m

1 stop

ISP5:20 pmIslip Long Island

$365

Southwest

Mar 20

ISP5:55 pmIslip Long Island

6h 45m

1 stop

HOU11:40 pmHouston Hobby

Mar 23

HOU3:05 pmHouston Hobby

7h 50m

2 stops

ISP11:55 pmIslip Long Island

$374

Southwest

Mar 20

ISP2:00 pmIslip Long Island

8h 25m

2 stops

HOU9:25 pmHouston Hobby

Mar 23

HOU3:05 pmHouston Hobby

7h 50m

2 stops

ISP11:55 pmIslip Long Island

$393

Frontier flights from Islip, New York to Houston

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

Frontier

Feb 21

ISP11:41 amIslip Long Island

21h 14m

1 stop

IAH7:55 amHouston George Bush Intcntl

Feb 28

IAH11:12 amHouston George Bush Intcntl

19h 36m

1 stop

ISP7:48 amIslip Long Island

$129

Frontier

Feb 5

ISP7:43 pmIslip Long Island

22h 27m

1 stop

IAH5:10 pmHouston George Bush Intcntl

Feb 14

IAH8:18 pmHouston George Bush Intcntl

10h 30m

1 stop

ISP7:48 amIslip Long Island

$180

Frontier

Feb 28

ISP8:23 pmIslip Long Island

12h 32m

1 stop

IAH7:55 amHouston George Bush Intcntl

Mar 1

IAH8:18 pmHouston George Bush Intcntl

10h 20m

1 stop

ISP7:38 amIslip Long Island

$189

Fly from

Fly to

Route

Depart

Return

Price

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 2/21

11:41 am-7:55 am

1 stop21h 14m

Houston George Bush Intcntl

Sat 2/28

11:12 am-7:48 am

1 stop19h 36m

$129

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 2/5

7:43 pm-5:10 pm

1 stop22h 27m

Houston George Bush Intcntl

Sat 2/14

8:18 pm-7:48 am

1 stop10h 30m

$180

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 2/28

8:23 pm-7:55 am

1 stop12h 32m

Houston George Bush Intcntl

Sun 3/1

8:18 pm-7:38 am

1 stop10h 20m

$189

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Mon 2/2

7:43 pm-9:57 pm

1 stop27h 14m

Houston George Bush Intcntl

Thu 2/5

8:18 pm-8:47 pm

1 stop23h 29m

$201

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

$215

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Mon 3/9

10:58 am-8:08 pm

1 stop10h 10m

Houston George Bush Intcntl

Thu 3/19

9:15 pm-12:47 pm

1 stop14h 32m

$228

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 2/26

3:34 pm-6:28 pm

1 stop27h 54m

Houston George Bush Intcntl

Sun 3/1

8:18 pm-7:38 am

1 stop10h 20m

$236

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 2/25

9:33 am-7:04 pm

1 stop10h 31m

Houston George Bush Intcntl

Tue 3/3

7:59 pm-8:40 am

1 stop11h 41m

$241

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Fri 3/27

5:15 pm-12:15 am

1 stop8h 00m

Houston Hobby

Sat 4/4

10:10 am-5:20 pm

1 stop6h 10m

$365

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Fri 3/20

5:55 pm-11:40 pm

1 stop6h 45m

Houston Hobby

Mon 3/23

3:05 pm-11:55 pm

2 stops7h 50m

$374

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 $326. 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 $455.

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 $323. Try not to purchase tickets in the morning because they tend to be around $376. 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 30m
Direct flights	None

The fastest flight from Islip, New York to Houston takes 6h 30m

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 6h 30m 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 4,267 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.