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Cheap flights from Islip, New York to Houston from $105

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Islip, New York to Houston departing on 4/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Islip, New York to Houston

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
4:07 pm - 8:38 am
ISP
-
IAH
17h 31m
1 stop
Frontier Logo
5:12 pm - 9:28 am
IAH
-
ISP
15h 16m
1 stop
$210Frontier
Fri, Apr 24 - Sun, Apr 26
Frontier Logo
4:07 pm - 8:38 am
ISP
-
IAH
17h 31m
1 stop
Frontier Logo
7:55 pm - 9:13 am
IAH
-
ISP
12h 18m
1 stop
$217Frontier
Fri, Apr 24 - Thu, Apr 30
Frontier Logo
11:00 am - 6:49 pm
ISP
-
IAH
8h 49m
1 stop
Frontier Logo
8:02 pm - 10:05 am
IAH
-
ISP
37h 03m
2 stops
$235Frontier
Fri, May 8 - Tue, May 12
Frontier Logo
7:59 pm - 7:02 am
ISP
-
IAH
12h 03m
1 stop
Frontier Logo
7:55 pm - 9:13 am
IAH
-
ISP
12h 18m
1 stop
$250Frontier
Sun, Apr 12 - Thu, Apr 16
Frontier Logo
4:07 pm - 8:38 am
ISP
-
IAH
17h 31m
1 stop
Frontier Logo
7:46 pm - 9:13 am
IAH
-
ISP
12h 27m
1 stop
$260Frontier
Thu, Apr 16 - Sun, Apr 19
Multiple Airlines Logo
11:50 am - 1:03 pm
ISP
-
IAH
26h 13m
1 stop
Multiple Airlines Logo
6:00 am - 1:31 pm
IAH
-
ISP
30h 31m
2 stops
$301Multiple Airlines
Wed, Apr 15 - Sun, Apr 19
Southwest Logo
4:30 pm - 12:05 am
ISP
-
HOU
8h 35m
1 stop
Southwest Logo
5:05 am - 11:50 am
HOU
-
ISP
5h 45m
1 stop
$314Southwest
Thu, Apr 16 - Sun, Apr 19
Southwest Logo
5:15 pm - 10:45 pm
ISP
-
HOU
6h 30m
1 stop
Southwest Logo
5:05 am - 11:50 am
HOU
-
ISP
5h 45m
1 stop
$322Southwest
Wed, Apr 15 - Sun, Apr 19
Southwest Logo
6:30 am - 1:40 pm
ISP
-
HOU
8h 10m
2 stops
Southwest Logo
5:05 am - 11:50 am
HOU
-
ISP
5h 45m
1 stop
$327Southwest
Wed, Apr 15 - Sun, Apr 19
Southwest Logo
4:40 pm - 9:40 pm
ISP
-
HOU
6h 00m
1 stop
Southwest Logo
5:30 am - 11:50 am
HOU
-
ISP
5h 20m
1 stop
$341Southwest
Sat, May 23 - Fri, May 29

Southwest flights from Islip, New York to Houston

Our best Southwest deals on Islip, New York to Houston flight tickets
Southwest
Apr 15
ISP5:15 pmIslip Long Island
6h 30m
1 stop
HOU10:45 pmHouston Hobby
Apr 19
HOU5:05 amHouston Hobby
5h 45m
1 stop
ISP11:50 amIslip Long Island
$322
Southwest
Apr 15
ISP6:30 amIslip Long Island
8h 10m
2 stops
HOU1:40 pmHouston Hobby
Apr 19
HOU5:05 amHouston Hobby
5h 45m
1 stop
ISP11:50 amIslip Long Island
$327
Southwest
May 23
ISP4:40 pmIslip Long Island
6h 00m
1 stop
HOU9:40 pmHouston Hobby
May 29
HOU5:30 amHouston Hobby
5h 20m
1 stop
ISP11:50 amIslip Long Island
$341

Frontier flights from Islip, New York to Houston

Our best Frontier deals on Islip, New York to Houston flight tickets
Frontier
Apr 24
ISP4:07 pmIslip Long Island
17h 31m
1 stop
IAH8:38 amHouston George Bush Intcntl
Apr 26
IAH5:12 pmHouston George Bush Intcntl
15h 16m
1 stop
ISP9:28 amIslip Long Island
$210
Frontier
Apr 24
ISP4:07 pmIslip Long Island
17h 31m
1 stop
IAH8:38 amHouston George Bush Intcntl
Apr 30
IAH7:55 pmHouston George Bush Intcntl
12h 18m
1 stop
ISP9:13 amIslip Long Island
$217
Frontier
May 8
ISP11:00 amIslip Long Island
8h 49m
1 stop
IAH6:49 pmHouston George Bush Intcntl
May 12
IAH8:02 pmHouston George Bush Intcntl
37h 03m
2 stops
ISP10:05 amIslip Long Island
$235

momondo Fare Finder

 
Customize your flight search to find flights from Islip, New York to Houston that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated March 18, 2026.
Use the filters below to find and compare flights from Islip, New York to Houston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 4/24

4:07 pm-8:38 am

1 stop17h 31m

Houston George Bush Intcntl

Sun 4/26

5:12 pm-9:28 am

1 stop15h 16m

$210

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 4/24

4:07 pm-8:38 am

1 stop17h 31m

Houston George Bush Intcntl

Thu 4/30

7:55 pm-9:13 am

1 stop12h 18m

$217

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 5/8

11:00 am-6:49 pm

1 stop8h 49m

Houston George Bush Intcntl

Tue 5/12

8:02 pm-10:05 am

2 stops37h 03m

$235

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 4/12

7:59 pm-7:02 am

1 stop12h 03m

Houston George Bush Intcntl

Thu 4/16

7:55 pm-9:13 am

1 stop12h 18m

$250

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 4/16

4:07 pm-8:38 am

1 stop17h 31m

Houston George Bush Intcntl

Sun 4/19

7:46 pm-9:13 am

1 stop12h 27m

$260

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 4/15

11:50 am-1:03 pm

1 stop26h 13m

Houston George Bush Intcntl

Sun 4/19

6:00 am-1:31 pm

2 stops30h 31m

$301

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Thu 4/16

4:30 pm-12:05 am

1 stop8h 35m

Houston Hobby

Sun 4/19

5:05 am-11:50 am

1 stop5h 45m

$314

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Wed 4/15

5:15 pm-10:45 pm

1 stop6h 30m

Houston Hobby

Sun 4/19

5:05 am-11:50 am

1 stop5h 45m

$322

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Wed 4/15

6:30 am-1:40 pm

2 stops8h 10m

Houston Hobby

Sun 4/19

5:05 am-11:50 am

1 stop5h 45m

$327
Quickest round-trip

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Sat 5/23

4:40 pm-9:40 pm

1 stop6h 00m

Houston Hobby

Fri 5/29

5:30 am-11:50 am

1 stop5h 20m

$341

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Houston from

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

What is the typical price of a round-trip flight between Islip, New York and Houston?

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 Friday. momondo users have found tickets for Friday departures for as low as $333. 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 $453.

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 $362. Try not to purchase tickets in the evening because they tend to be around $398. 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 49m

Direct flights

None
The fastest flight from Islip, New York to Houston takes 8h 49m
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 8h 49m 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?

  • 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
SouthwestPriceFrom $266Free CancellationRating
8.0
4,320 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.

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