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Cheap flights from Islip, New York to Houston from $95

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
5:45 am - 3:14 pm
ISP
-
IAH
10h 29m
1 stop
Frontier Logo
6:57 pm - 9:13 am
IAH
-
ISP
13h 16m
1 stop
$190Frontier
Sat, Apr 11 - Sat, Apr 18
Frontier Logo
8:36 pm - 7:02 am
ISP
-
IAH
11h 26m
1 stop
Frontier Logo
6:59 pm - 9:13 am
IAH
-
ISP
13h 14m
1 stop
$211Frontier
Sun, Apr 12 - Thu, Apr 16
Frontier Logo
7:34 pm - 8:38 am
ISP
-
IAH
14h 04m
1 stop
Frontier Logo
5:49 pm - 2:55 pm
IAH
-
ISP
20h 06m
2 stops
$217Frontier
Mon, Apr 13 - Thu, Apr 16
Frontier Logo
8:36 pm - 7:02 am
ISP
-
IAH
11h 26m
1 stop
Frontier Logo
6:57 pm - 9:13 am
IAH
-
ISP
13h 16m
1 stop
$232Frontier
Sun, Apr 12 - Wed, Apr 15
Multiple Airlines Logo
11:50 am - 12:57 pm
ISP
-
IAH
26h 07m
1 stop
Multiple Airlines Logo
9:15 pm - 10:28 pm
IAH
-
ISP
24h 13m
1 stop
$237Multiple Airlines
Wed, Mar 25 - Tue, Mar 31
Multiple Airlines Logo
11:50 am - 12:57 pm
ISP
-
IAH
26h 07m
1 stop
Multiple Airlines Logo
5:15 am - 1:21 am
IAH
-
ISP
19h 06m
2 stops
$241Multiple Airlines
Wed, Mar 25 - Tue, Mar 31
Southwest Logo
4:10 pm - 8:55 pm
ISP
-
HOU
5h 45m
1 stop
Southwest Logo
5:05 pm - 11:30 pm
HOU
-
ISP
5h 25m
1 stop
$287Southwest
Wed, Apr 15 - Mon, Apr 20
Southwest Logo
5:15 pm - 10:45 pm
ISP
-
HOU
6h 30m
1 stop
Southwest Logo
10:20 am - 8:25 pm
HOU
-
ISP
9h 05m
2 stops
$292Southwest
Wed, Apr 15 - Mon, Apr 20
Southwest Logo
2:30 pm - 10:45 pm
ISP
-
HOU
9h 15m
2 stops
Southwest Logo
10:20 am - 8:25 pm
HOU
-
ISP
9h 05m
2 stops
$297Southwest
Wed, Apr 15 - Mon, Apr 20
Southwest Logo
6:50 am - 11:50 am
ISP
-
HOU
6h 00m
1 stop
Southwest Logo
5:05 am - 11:50 am
HOU
-
ISP
5h 45m
1 stop
$328Southwest
Thu, Apr 30 - Sun, May 10

Southwest flights from Islip, New York to Houston

Our best Southwest deals on Islip, New York to Houston flight tickets
Southwest
Apr 15
ISP4:10 pmIslip Long Island
5h 45m
1 stop
HOU8:55 pmHouston Hobby
Apr 20
HOU5:05 pmHouston Hobby
5h 25m
1 stop
ISP11:30 pmIslip Long Island
$287
Southwest
Apr 15
ISP5:15 pmIslip Long Island
6h 30m
1 stop
HOU10:45 pmHouston Hobby
Apr 20
HOU10:20 amHouston Hobby
9h 05m
2 stops
ISP8:25 pmIslip Long Island
$292
Southwest
Apr 15
ISP2:30 pmIslip Long Island
9h 15m
2 stops
HOU10:45 pmHouston Hobby
Apr 20
HOU10:20 amHouston Hobby
9h 05m
2 stops
ISP8:25 pmIslip Long Island
$297

Frontier flights from Islip, New York to Houston

Our best Frontier deals on Islip, New York to Houston flight tickets
Frontier
Apr 11
ISP5:45 amIslip Long Island
10h 29m
1 stop
IAH3:14 pmHouston George Bush Intcntl
Apr 18
IAH6:57 pmHouston George Bush Intcntl
13h 16m
1 stop
ISP9:13 amIslip Long Island
$190
Frontier
Apr 12
ISP8:36 pmIslip Long Island
11h 26m
1 stop
IAH7:02 amHouston George Bush Intcntl
Apr 16
IAH6:59 pmHouston George Bush Intcntl
13h 14m
1 stop
ISP9:13 amIslip Long Island
$211
Frontier
Apr 13
ISP7:34 pmIslip Long Island
14h 04m
1 stop
IAH8:38 amHouston George Bush Intcntl
Apr 16
IAH5:49 pmHouston George Bush Intcntl
20h 06m
2 stops
ISP2:55 pmIslip Long Island
$217

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 February 15, 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

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 4/11

5:45 am-3:14 pm

1 stop10h 29m

Houston George Bush Intcntl

Sat 4/18

6:57 pm-9:13 am

1 stop13h 16m

$190

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 4/12

8:36 pm-7:02 am

1 stop11h 26m

Houston George Bush Intcntl

Thu 4/16

6:59 pm-9:13 am

1 stop13h 14m

$211

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Mon 4/13

7:34 pm-8:38 am

1 stop14h 04m

Houston George Bush Intcntl

Thu 4/16

5:49 pm-2:55 pm

2 stops20h 06m

$217

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 4/12

8:36 pm-7:02 am

1 stop11h 26m

Houston George Bush Intcntl

Wed 4/15

6:57 pm-9:13 am

1 stop13h 16m

$232

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 3/25

11:50 am-12:57 pm

1 stop26h 07m

Houston George Bush Intcntl

Tue 3/31

9:15 pm-10:28 pm

1 stop24h 13m

$237

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 3/25

11:50 am-12:57 pm

1 stop26h 07m

Houston George Bush Intcntl

Tue 3/31

5:15 am-1:21 am

2 stops19h 06m

$241

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Wed 4/15

4:10 pm-8:55 pm

1 stop5h 45m

Houston Hobby

Mon 4/20

5:05 pm-11:30 pm

1 stop5h 25m

$287

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Wed 4/15

5:15 pm-10:45 pm

1 stop6h 30m

Houston Hobby

Mon 4/20

10:20 am-8:25 pm

2 stops9h 05m

$292

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Wed 4/15

2:30 pm-10:45 pm

2 stops9h 15m

Houston Hobby

Mon 4/20

10:20 am-8:25 pm

2 stops9h 05m

$297

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Thu 4/30

6:50 am-11:50 am

1 stop6h 00m

Houston Hobby

Sun 5/10

5:05 am-11:50 am

1 stop5h 45m

$328

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 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 $322. 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 $457.

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 $340. Try not to purchase tickets in the evening because they tend to be around $391. 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 00m

Direct flights

None
The fastest flight from Islip, New York to Houston takes 6h 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 6h 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?

  • 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
4,285 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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