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Cheap flights from Islip, New York to Houston from $86

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 5/12. 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
11:00 am - 8:50 am
ISP
-
IAH
22h 50m
1 stop
Frontier Logo
1:29 pm - 11:00 am
IAH
-
ISP
20h 31m
1 stop
$185Frontier
Fri, May 8 - Mon, May 11
Frontier Logo
11:00 am - 6:48 pm
ISP
-
IAH
8h 48m
1 stop
Frontier Logo
7:44 pm - 11:00 am
IAH
-
ISP
14h 16m
1 stop
$210Frontier
Sat, May 16 - Mon, May 18
Frontier Logo
4:07 pm - 5:59 pm
ISP
-
IAH
26h 52m
1 stop
Frontier Logo
1:58 pm - 7:36 pm
IAH
-
ISP
28h 38m
1 stop
$225Frontier
Sun, Apr 26 - Thu, Apr 30
Frontier Logo
11:00 am - 6:49 pm
ISP
-
IAH
8h 49m
1 stop
Frontier Logo
7:28 pm - 10:05 am
IAH
-
ISP
13h 37m
1 stop
$230Frontier
Wed, May 6 - Sun, May 10
Frontier Logo
4:07 pm - 6:49 pm
ISP
-
IAH
27h 42m
1 stop
Frontier Logo
8:02 pm - 6:14 pm
IAH
-
ISP
21h 12m
2 stops
$233Frontier
Mon, May 4 - Thu, May 7
Multiple Airlines Logo
8:31 pm - 11:29 pm
ISP
-
IAH
27h 58m
2 stops
Multiple Airlines Logo
1:41 pm - 11:00 am
IAH
-
ISP
20h 19m
1 stop
$244Multiple Airlines
Thu, Apr 30 - Mon, May 4
Southwest Logo
9:00 am - 3:10 pm
ISP
-
HOU
7h 10m
1 stop
Southwest Logo
5:35 am - 11:35 am
HOU
-
ISP
5h 00m
1 stop
$293Southwest
Wed, May 6 - Sat, May 9
Southwest Logo
9:00 am - 3:10 pm
ISP
-
HOU
7h 10m
1 stop
Southwest Logo
2:00 pm - 11:20 pm
HOU
-
ISP
8h 20m
2 stops
$298Southwest
Wed, May 6 - Sat, May 9
Southwest Logo
2:30 pm - 10:45 pm
ISP
-
HOU
9h 15m
2 stops
Southwest Logo
1:35 pm - 11:20 pm
HOU
-
ISP
8h 45m
2 stops
$303Southwest
Wed, May 6 - Sat, May 9
Southwest Logo
9:00 am - 3:10 pm
ISP
-
HOU
7h 10m
1 stop
Southwest Logo
5:30 pm - 11:50 pm
HOU
-
ISP
5h 20m
1 stop
$336Southwest
Wed, May 6 - Sun, May 10

Southwest flights from Islip, New York to Houston

Our best Southwest deals on Islip, New York to Houston flight tickets
Southwest
May 6
ISP9:00 amIslip Long Island
7h 10m
1 stop
HOU3:10 pmHouston Hobby
May 9
HOU5:35 amHouston Hobby
5h 00m
1 stop
ISP11:35 amIslip Long Island
$293
Southwest
May 6
ISP9:00 amIslip Long Island
7h 10m
1 stop
HOU3:10 pmHouston Hobby
May 9
HOU2:00 pmHouston Hobby
8h 20m
2 stops
ISP11:20 pmIslip Long Island
$298
Southwest
May 6
ISP2:30 pmIslip Long Island
9h 15m
2 stops
HOU10:45 pmHouston Hobby
May 9
HOU1:35 pmHouston Hobby
8h 45m
2 stops
ISP11:20 pmIslip Long Island
$303

Frontier flights from Islip, New York to Houston

Our best Frontier deals on Islip, New York to Houston flight tickets
Frontier
May 8
ISP11:00 amIslip Long Island
22h 50m
1 stop
IAH8:50 amHouston George Bush Intcntl
May 11
IAH1:29 pmHouston George Bush Intcntl
20h 31m
1 stop
ISP11:00 amIslip Long Island
$185
Frontier
May 16
ISP11:00 amIslip Long Island
8h 48m
1 stop
IAH6:48 pmHouston George Bush Intcntl
May 18
IAH7:44 pmHouston George Bush Intcntl
14h 16m
1 stop
ISP11:00 amIslip Long Island
$210
Frontier
Apr 26
ISP4:07 pmIslip Long Island
26h 52m
1 stop
IAH5:59 pmHouston George Bush Intcntl
Apr 30
IAH1:58 pmHouston George Bush Intcntl
28h 38m
1 stop
ISP7:36 pmIslip Long Island
$225

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 April 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

Cheapest round-trip

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 5/8

11:00 am-8:50 am

1 stop22h 50m

Houston George Bush Intcntl

Mon 5/11

1:29 pm-11:00 am

1 stop20h 31m

$185

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 5/16

11:00 am-6:48 pm

1 stop8h 48m

Houston George Bush Intcntl

Mon 5/18

7:44 pm-11:00 am

1 stop14h 16m

$210

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sun 4/26

4:07 pm-5:59 pm

1 stop26h 52m

Houston George Bush Intcntl

Thu 4/30

1:58 pm-7:36 pm

1 stop28h 38m

$225

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 5/6

11:00 am-6:49 pm

1 stop8h 49m

Houston George Bush Intcntl

Sun 5/10

7:28 pm-10:05 am

1 stop13h 37m

$230

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Mon 5/4

4:07 pm-6:49 pm

1 stop27h 42m

Houston George Bush Intcntl

Thu 5/7

8:02 pm-6:14 pm

2 stops21h 12m

$233

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Thu 4/30

8:31 pm-11:29 pm

2 stops27h 58m

Houston George Bush Intcntl

Mon 5/4

1:41 pm-11:00 am

1 stop20h 19m

$244
Quickest round-trip

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Wed 5/6

9:00 am-3:10 pm

1 stop7h 10m

Houston Hobby

Sat 5/9

5:35 am-11:35 am

1 stop5h 00m

$293

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Wed 5/6

9:00 am-3:10 pm

1 stop7h 10m

Houston Hobby

Sat 5/9

2:00 pm-11:20 pm

2 stops8h 20m

$298

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Wed 5/6

2:30 pm-10:45 pm

2 stops9h 15m

Houston Hobby

Sat 5/9

1:35 pm-11:20 pm

2 stops8h 45m

$303

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Wed 5/6

9:00 am-3:10 pm

1 stop7h 10m

Houston Hobby

Sun 5/10

5:30 pm-11:50 pm

1 stop5h 20m

$336

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 Friday. momondo users have found tickets for Friday 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 $458.

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 in the morning. Our users have found flights to Houston in the morning for as low as $372. Try not to purchase tickets in the afternoon because they tend to be around $408. 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 40m

Direct flights

None
The fastest flight from Islip, New York to Houston takes 6h 40m
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

Frequently asked questions about flying from Islip, New York to Houston

  • 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 40m 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
4,328 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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