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Cheap flights from Islip, New York to Houston from $100

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
6:05 am - 9:33 am
IAH
-
ISP
26h 28m
2 stops
$173Frontier
Mon, Apr 27 - Wed, Apr 29
Frontier Logo
4:07 pm - 8:38 am
ISP
-
IAH
17h 31m
1 stop
Frontier Logo
6:57 pm - 9:33 am
IAH
-
ISP
13h 36m
1 stop
$186Frontier
Mon, Apr 27 - Wed, Apr 29
Frontier Logo
8:31 pm - 3:32 pm
ISP
-
IAH
20h 01m
1 stop
Frontier Logo
7:46 pm - 9:13 am
IAH
-
ISP
12h 27m
1 stop
$205Frontier
Thu, Apr 16 - Sun, Apr 19
Frontier Logo
4:07 pm - 5:59 pm
ISP
-
IAH
26h 52m
1 stop
Frontier Logo
8:06 pm - 9:13 am
IAH
-
ISP
12h 07m
1 stop
$210Frontier
Thu, Apr 30 - Sun, May 3
Frontier Logo
8:31 pm - 3:32 pm
ISP
-
IAH
20h 01m
1 stop
Frontier Logo
8:06 pm - 9:13 am
IAH
-
ISP
12h 07m
1 stop
$230Frontier
Thu, Apr 30 - Sun, May 3
Southwest Logo
4:30 pm - 12:05 am
ISP
-
HOU
8h 35m
1 stop
Southwest Logo
6:00 am - 11:55 am
HOU
-
ISP
4h 55m
1 stop
$279Southwest
Mon, Apr 20 - Tue, Apr 21
Southwest Logo
4:30 pm - 12:05 am
ISP
-
HOU
8h 35m
1 stop
Southwest Logo
6:00 am - 1:50 pm
HOU
-
ISP
6h 50m
2 stops
$284Southwest
Mon, Apr 20 - Tue, Apr 21
Southwest Logo
4:30 pm - 12:05 am
ISP
-
HOU
8h 35m
2 stops
Southwest Logo
2:00 pm - 10:10 pm
HOU
-
ISP
7h 10m
2 stops
$290Southwest
Mon, Apr 20 - Tue, Apr 21
Multiple Airlines Logo
4:07 pm - 5:29 pm
ISP
-
IAH
26h 22m
2 stops
Multiple Airlines Logo
6:01 pm - 1:31 pm
IAH
-
ISP
18h 30m
1 stop
$294Multiple Airlines
Sun, Apr 26 - Sun, May 3
Southwest Logo
4:30 pm - 12:05 am
ISP
-
HOU
8h 35m
1 stop
Southwest Logo
5:05 pm - 11:30 pm
HOU
-
ISP
5h 25m
1 stop
$308Southwest
Mon, Apr 20 - Fri, Apr 24

Southwest flights from Islip, New York to Houston

Our best Southwest deals on Islip, New York to Houston flight tickets
Southwest
Apr 20
ISP4:30 pmIslip Long Island
8h 35m
1 stop
HOU12:05 amHouston Hobby
Apr 21
HOU6:00 amHouston Hobby
4h 55m
1 stop
ISP11:55 amIslip Long Island
$279
Southwest
Apr 20
ISP4:30 pmIslip Long Island
8h 35m
1 stop
HOU12:05 amHouston Hobby
Apr 21
HOU6:00 amHouston Hobby
6h 50m
2 stops
ISP1:50 pmIslip Long Island
$284
Southwest
Apr 20
ISP4:30 pmIslip Long Island
8h 35m
2 stops
HOU12:05 amHouston Hobby
Apr 21
HOU2:00 pmHouston Hobby
7h 10m
2 stops
ISP10:10 pmIslip Long Island
$290

Frontier flights from Islip, New York to Houston

Our best Frontier deals on Islip, New York to Houston flight tickets
Frontier
Apr 27
ISP4:07 pmIslip Long Island
17h 31m
1 stop
IAH8:38 amHouston George Bush Intcntl
Apr 29
IAH6:05 amHouston George Bush Intcntl
26h 28m
2 stops
ISP9:33 amIslip Long Island
$173
Frontier
Apr 27
ISP4:07 pmIslip Long Island
17h 31m
1 stop
IAH8:38 amHouston George Bush Intcntl
Apr 29
IAH6:57 pmHouston George Bush Intcntl
13h 36m
1 stop
ISP9:33 amIslip Long Island
$186
Frontier
Apr 16
ISP8:31 pmIslip Long Island
20h 01m
1 stop
IAH3:32 pmHouston George Bush Intcntl
Apr 19
IAH7:46 pmHouston George Bush Intcntl
12h 27m
1 stop
ISP9:13 amIslip Long Island
$205

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 28, 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

Mon 4/27

4:07 pm-8:38 am

1 stop17h 31m

Houston George Bush Intcntl

Wed 4/29

6:05 am-9:33 am

2 stops26h 28m

$173

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Mon 4/27

4:07 pm-8:38 am

1 stop17h 31m

Houston George Bush Intcntl

Wed 4/29

6:57 pm-9:33 am

1 stop13h 36m

$186

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 4/16

8:31 pm-3:32 pm

1 stop20h 01m

Houston George Bush Intcntl

Sun 4/19

7:46 pm-9:13 am

1 stop12h 27m

$205

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 4/30

4:07 pm-5:59 pm

1 stop26h 52m

Houston George Bush Intcntl

Sun 5/3

8:06 pm-9:13 am

1 stop12h 07m

$210

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 4/30

8:31 pm-3:32 pm

1 stop20h 01m

Houston George Bush Intcntl

Sun 5/3

8:06 pm-9:13 am

1 stop12h 07m

$230
Quickest round-trip

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Mon 4/20

4:30 pm-12:05 am

1 stop8h 35m

Houston Hobby

Tue 4/21

6:00 am-11:55 am

1 stop4h 55m

$279

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Mon 4/20

4:30 pm-12:05 am

1 stop8h 35m

Houston Hobby

Tue 4/21

6:00 am-1:50 pm

2 stops6h 50m

$284

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Mon 4/20

4:30 pm-12:05 am

2 stops8h 35m

Houston Hobby

Tue 4/21

2:00 pm-10:10 pm

2 stops7h 10m

$290

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 4/26

4:07 pm-5:29 pm

2 stops26h 22m

Houston George Bush Intcntl

Sun 5/3

6:01 pm-1:31 pm

1 stop18h 30m

$294

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Mon 4/20

4:30 pm-12:05 am

1 stop8h 35m

Houston Hobby

Fri 4/24

5:05 pm-11:30 pm

1 stop5h 25m

$308

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 $330. 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 $446.

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 $366. Try not to purchase tickets in the evening because they tend to be around $401. 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

5h 45m

Direct flights

None
The fastest flight from Islip, New York to Houston takes 5h 45m
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 5h 45m 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
4,333 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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