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 November 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

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 6:29 pmISP-IAH

13h 29m1 stop

8:07 pm - 9:13 amIAH-ISP

12h 06m1 stop

$130Frontier

Find Deal

Wed, Dec 3 - Wed, Dec 10

12:01 pm - 7:03 pmISP-IAH

8h 02m1 stop

8:17 pm - 10:40 amIAH-ISP

13h 23m1 stop

$138Frontier

Find Deal

Sun, Jan 18 - Sun, Jan 25

11:35 am - 10:54 amISP-IAH

24h 19m1 stop

11:49 am - 10:40 amIAH-ISP

21h 51m1 stop

$142Frontier

Find Deal

Fri, Jan 23 - Sun, Jan 25

6:00 am - 6:36 amISP-IAH

25h 36m1 stop

6:04 pm - 8:02 amIAH-ISP

12h 58m1 stop

$144Frontier

Find Deal

Fri, Nov 21 - Sun, Nov 23

11:32 am - 9:39 amISP-IAH

23h 07m1 stop

5:46 pm - 10:18 amIAH-ISP

15h 32m1 stop

$145Frontier

Find Deal

Fri, Nov 21 - Mon, Nov 24

12:45 pm - 4:45 pmISP-IAH

29h 00m2 stops

8:17 pm - 10:40 amIAH-ISP

13h 23m1 stop

$237Multiple Airlines

Find Deal

Tue, Jan 20 - Sat, Jan 24

6:00 pm - 12:05 amISP-HOU

7h 05m1 stop

6:00 am - 3:20 pmHOU-ISP

8h 20m2 stops

$357Southwest

Find Deal

Mon, Dec 1 - Mon, Dec 8

5:40 am - 1:45 pmISP-HOU

9h 05m2 stops

5:40 am - 11:45 amHOU-ISP

5h 05m1 stop

$457Southwest

Find Deal

Fri, Dec 26 - Sat, Jan 3

5:40 am - 1:45 pmISP-HOU

9h 05m2 stops

3:10 pm - 11:55 pmHOU-ISP

7h 45m2 stops

$505Southwest

Find Deal

Fri, Dec 26 - Sat, Jan 3

5:40 am - 1:45 pmISP-HOU

9h 05m2 stops

3:55 pm - 11:55 pmHOU-ISP

7h 00m2 stops

$536Southwest

Find Deal

Fri, Dec 26 - Sun, Jan 4

Southwest flights from Islip, New York to Houston

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

Southwest

Dec 1

ISP6:00 pmIslip Long Island

7h 05m

1 stop

HOU12:05 amHouston Hobby

Dec 8

HOU6:00 amHouston Hobby

8h 20m

2 stops

ISP3:20 pmIslip Long Island

$357

Find similar

Southwest

Dec 26

ISP5:40 amIslip Long Island

9h 05m

2 stops

HOU1:45 pmHouston Hobby

Jan 3

HOU5:40 amHouston Hobby

5h 05m

1 stop

ISP11:45 amIslip Long Island

$457

Find similar

Southwest

Dec 26

ISP5:40 amIslip Long Island

9h 05m

2 stops

HOU1:45 pmHouston Hobby

Jan 3

HOU3:10 pmHouston Hobby

7h 45m

2 stops

ISP11:55 pmIslip Long Island

$505

Find similar

Frontier flights from Islip, New York to Houston

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

Frontier

Nov 20

ISP10:02 amIslip Long Island

24h 37m

1 stop

IAH9:39 amHouston George Bush Intcntl

Dec 4

IAH8:07 pmHouston George Bush Intcntl

22h 27m

1 stop

ISP7:34 pmIslip Long Island

$130

Find similar

Frontier

Nov 18

ISP6:27 pmIslip Long Island

16h 06m

1 stop

IAH9:33 amHouston George Bush Intcntl

Nov 23

IAH6:04 pmHouston George Bush Intcntl

12h 58m

1 stop

ISP8:02 amIslip Long Island

$137

Find similar

Frontier

Jan 18

ISP12:01 pmIslip Long Island

8h 02m

1 stop

IAH7:03 pmHouston George Bush Intcntl

Jan 25

IAH8:17 pmHouston George Bush Intcntl

13h 23m

1 stop

ISP10:40 amIslip Long Island

$138

Find similar

Fly from

Fly to

Route

Depart

Return

Price

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 12/3

6:00 am-6:29 pm

1 stop13h 29m

Houston George Bush Intcntl

Wed 12/10

8:07 pm-9:13 am

1 stop12h 06m

$130

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 1/18

12:01 pm-7:03 pm

1 stop8h 02m

Houston George Bush Intcntl

Sun 1/25

8:17 pm-10:40 am

1 stop13h 23m

$138

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 1/23

11:35 am-10:54 am

1 stop24h 19m

Houston George Bush Intcntl

Sun 1/25

11:49 am-10:40 am

1 stop21h 51m

$142

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 11/21

6:00 am-6:36 am

1 stop25h 36m

Houston George Bush Intcntl

Sun 11/23

6:04 pm-8:02 am

1 stop12h 58m

$144

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 11/21

11:32 am-9:39 am

1 stop23h 07m

Houston George Bush Intcntl

Mon 11/24

5:46 pm-10:18 am

1 stop15h 32m

$145

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Tue 1/20

12:45 pm-4:45 pm

2 stops29h 00m

Houston George Bush Intcntl

Sat 1/24

8:17 pm-10:40 am

1 stop13h 23m

$237

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Mon 12/1

6:00 pm-12:05 am

1 stop7h 05m

Houston Hobby

Mon 12/8

6:00 am-3:20 pm

2 stops8h 20m

$357

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Fri 12/26

5:40 am-1:45 pm

2 stops9h 05m

Houston Hobby

Sat 1/3

5:40 am-11:45 am

1 stop5h 05m

$457

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Fri 12/26

5:40 am-1:45 pm

2 stops9h 05m

Houston Hobby

Sat 1/3

3:10 pm-11:55 pm

2 stops7h 45m

$505

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Fri 12/26

5:40 am-1:45 pm

2 stops9h 05m

Houston Hobby

Sun 1/4

3:55 pm-11:55 pm

2 stops7h 00m

$536

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 $463.

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 $317. Try not to purchase tickets in the morning because they tend to be around $382. 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

Direct flights	None

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 6h 47m 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 November 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 4,241 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.