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.

12:00 pm - 11:45 amISP-IAH

24h 45m1 stop

12:16 pm - 10:46 pmIAH-ISP

9h 30m1 stop

$162Multiple Airlines

Find Deal

Tue, Jan 6 - Tue, Jan 13

12:00 pm - 11:45 amISP-IAH

24h 45m1 stop

7:45 am - 10:46 pmIAH-ISP

14h 01m2 stops

$183Multiple Airlines

Find Deal

Tue, Jan 6 - Tue, Jan 13

7:43 pm - 9:00 amISP-IAH

14h 17m1 stop

8:18 pm - 8:40 amIAH-ISP

11h 22m1 stop

$191Frontier

Find Deal

Thu, Jan 29 - Sat, Jan 31

8:29 pm - 6:29 pmISP-IAH

23h 00m1 stop

9:34 pm - 11:25 amIAH-ISP

12h 51m1 stop

$192Frontier

Find Deal

Tue, Dec 16 - Wed, Dec 24

2:01 pm - 10:01 amISP-IAH

21h 00m2 stops

8:13 pm - 7:51 pmIAH-ISP

22h 38m1 stop

$195Multiple Airlines

Find Deal

Fri, Jan 9 - Sun, Jan 11

8:19 pm - 7:54 amISP-IAH

12h 35m1 stop

8:44 am - 7:11 pmIAH-ISP

9h 27m1 stop

$203Frontier

Find Deal

Mon, Mar 9 - Thu, Mar 12

12:40 pm - 7:40 pmISP-HOU

8h 00m2 stops

11:00 am - 8:30 pmHOU-ISP

8h 30m1 stop

$245Southwest

Find Deal

Thu, Jan 29 - Sat, Jan 31

12:40 pm - 7:40 pmISP-HOU

8h 00m2 stops

7:25 am - 3:25 pmHOU-ISP

7h 00m2 stops

$250Southwest

Find Deal

Thu, Jan 29 - Sat, Jan 31

12:40 pm - 7:40 pmISP-HOU

8h 00m2 stops

3:00 pm - 10:20 pmHOU-ISP

6h 20m2 stops

$257Southwest

Find Deal

Wed, Jan 14 - Mon, Jan 19

12:40 pm - 8:45 pmISP-HOU

9h 05m1 stop

11:00 am - 8:30 pmHOU-ISP

8h 30m1 stop

$280Southwest

Find Deal

Thu, Jan 29 - Sat, Jan 31

Southwest flights from Islip, New York to Houston

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

Southwest

Jan 29

ISP12:40 pmIslip Long Island

8h 00m

2 stops

HOU7:40 pmHouston Hobby

Jan 31

HOU11:00 amHouston Hobby

8h 30m

1 stop

ISP8:30 pmIslip Long Island

$245

Find similar

Southwest

Jan 29

ISP12:40 pmIslip Long Island

8h 00m

2 stops

HOU7:40 pmHouston Hobby

Jan 31

HOU7:25 amHouston Hobby

7h 00m

2 stops

ISP3:25 pmIslip Long Island

$250

Find similar

Southwest

Jan 14

ISP12:40 pmIslip Long Island

8h 00m

2 stops

HOU7:40 pmHouston Hobby

Jan 19

HOU3:00 pmHouston Hobby

6h 20m

2 stops

ISP10:20 pmIslip Long Island

$257

Find similar

Frontier flights from Islip, New York to Houston

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

Frontier

Dec 10

ISP6:00 amIslip Long Island

13h 29m

1 stop

IAH6:29 pmHouston George Bush Intcntl

Dec 22

IAH9:34 pmHouston George Bush Intcntl

12h 51m

1 stop

ISP11:25 amIslip Long Island

$182

Find similar

Frontier

Jan 29

ISP7:43 pmIslip Long Island

14h 17m

1 stop

IAH9:00 amHouston George Bush Intcntl

Jan 31

IAH8:18 pmHouston George Bush Intcntl

11h 22m

1 stop

ISP8:40 amIslip Long Island

$191

Find similar

Frontier

Dec 16

ISP8:29 pmIslip Long Island

23h 00m

1 stop

IAH6:29 pmHouston George Bush Intcntl

Dec 24

IAH9:34 pmHouston George Bush Intcntl

12h 51m

1 stop

ISP11:25 amIslip Long Island

$192

Find similar

Fly from

Fly to

Route

Depart

Return

Price

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Tue 1/6

12:00 pm-11:45 am

1 stop24h 45m

Houston George Bush Intcntl

Tue 1/13

12:16 pm-10:46 pm

1 stop9h 30m

$162

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Tue 1/6

12:00 pm-11:45 am

1 stop24h 45m

Houston George Bush Intcntl

Tue 1/13

7:45 am-10:46 pm

2 stops14h 01m

$183

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 1/29

7:43 pm-9:00 am

1 stop14h 17m

Houston George Bush Intcntl

Sat 1/31

8:18 pm-8:40 am

1 stop11h 22m

$191

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Tue 12/16

8:29 pm-6:29 pm

1 stop23h 00m

Houston George Bush Intcntl

Wed 12/24

9:34 pm-11:25 am

1 stop12h 51m

$192

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 1/9

2:01 pm-10:01 am

2 stops21h 00m

Houston George Bush Intcntl

Sun 1/11

8:13 pm-7:51 pm

1 stop22h 38m

$195

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Mon 3/9

8:19 pm-7:54 am

1 stop12h 35m

Houston George Bush Intcntl

Thu 3/12

8:44 am-7:11 pm

1 stop9h 27m

$203

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Thu 1/29

12:40 pm-7:40 pm

2 stops8h 00m

Houston Hobby

Sat 1/31

11:00 am-8:30 pm

1 stop8h 30m

$245

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Thu 1/29

12:40 pm-7:40 pm

2 stops8h 00m

Houston Hobby

Sat 1/31

7:25 am-3:25 pm

2 stops7h 00m

$250

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Wed 1/14

12:40 pm-7:40 pm

2 stops8h 00m

Houston Hobby

Mon 1/19

3:00 pm-10:20 pm

2 stops6h 20m

$257

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Thu 1/29

12:40 pm-8:45 pm

1 stop9h 05m

Houston Hobby

Sat 1/31

11:00 am-8:30 pm

1 stop8h 30m

$280

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 $439.

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 $314. Try not to purchase tickets in the morning because they tend to be around $381. 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	8h 01m
Direct flights	None

The fastest flight from Islip, New York to Houston takes 8h 01m

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 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 4,253 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.