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Cheap flights from Islip, New York to Houston from $135

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 7/15. 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
10:48 am - 6:29 pm
ISP
-
IAH
8h 41m
1 stop
Frontier Logo
1:29 pm - 9:53 am
IAH
-
ISP
19h 24m
1 stop
$284Frontier
Sat, Jul 4 - Tue, Jul 7
Frontier Logo
9:52 pm - 8:47 am
ISP
-
IAH
11h 55m
1 stop
Frontier Logo
7:24 pm - 3:56 pm
IAH
-
ISP
19h 32m
1 stop
$301Frontier
Wed, Jun 24 - Mon, Jun 29
Frontier Logo
9:52 pm - 8:47 am
ISP
-
IAH
11h 55m
1 stop
Frontier Logo
7:24 pm - 8:57 pm
IAH
-
ISP
24h 33m
1 stop
$310Frontier
Fri, Jun 12 - Tue, Jun 16
Southwest Logo
6:00 am - 12:15 pm
ISP
-
HOU
7h 15m
1 stop
Southwest Logo
3:55 pm - 10:05 pm
HOU
-
ISP
5h 10m
1 stop
$322Southwest
Thu, Jul 30 - Thu, Aug 6
Frontier Logo
10:57 am - 8:45 am
ISP
-
IAH
22h 48m
1 stop
Frontier Logo
1:29 pm - 9:53 am
IAH
-
ISP
19h 24m
1 stop
$323Frontier
Wed, Jul 29 - Tue, Aug 4
Southwest Logo
5:50 pm - 12:10 am
ISP
-
HOU
7h 20m
2 stops
Southwest Logo
3:55 pm - 10:05 pm
HOU
-
ISP
5h 10m
1 stop
$327Southwest
Thu, Jul 30 - Thu, Aug 6
Frontier Logo
9:52 pm - 8:47 am
ISP
-
IAH
11h 55m
1 stop
Frontier Logo
7:24 pm - 3:56 pm
IAH
-
ISP
19h 32m
1 stop
$329Frontier
Sat, Jun 13 - Mon, Jun 15
Southwest Logo
6:00 am - 4:30 pm
ISP
-
HOU
11h 30m
1 stop
Southwest Logo
6:05 am - 4:55 pm
HOU
-
ISP
9h 50m
1 stop
$331Southwest
Wed, Jul 29 - Tue, Aug 4
Southwest Logo
3:05 pm - 10:15 pm
ISP
-
HOU
8h 10m
1 stop
Southwest Logo
3:55 pm - 10:05 pm
HOU
-
ISP
5h 10m
1 stop
$341Southwest
Fri, Jul 31 - Fri, Aug 7
Southwest Logo
2:55 pm - 10:15 pm
ISP
-
HOU
8h 20m
2 stops
Southwest Logo
7:20 am - 4:55 pm
HOU
-
ISP
8h 35m
2 stops
$342Southwest
Wed, Jul 29 - Tue, Aug 4

Southwest flights from Islip, New York to Houston

Our best Southwest deals on Islip, New York to Houston flight tickets
Southwest
Jul 30
ISP6:00 amIslip Long Island
7h 15m
1 stop
HOU12:15 pmHouston Hobby
Aug 6
HOU3:55 pmHouston Hobby
5h 10m
1 stop
ISP10:05 pmIslip Long Island
$322
Southwest
Jul 30
ISP5:50 pmIslip Long Island
7h 20m
2 stops
HOU12:10 amHouston Hobby
Aug 6
HOU3:55 pmHouston Hobby
5h 10m
1 stop
ISP10:05 pmIslip Long Island
$327
Southwest
Jul 29
ISP6:00 amIslip Long Island
11h 30m
1 stop
HOU4:30 pmHouston Hobby
Aug 4
HOU6:05 amHouston Hobby
9h 50m
1 stop
ISP4:55 pmIslip Long Island
$331

Frontier flights from Islip, New York to Houston

Our best Frontier deals on Islip, New York to Houston flight tickets
Frontier
Jul 4
ISP10:48 amIslip Long Island
8h 41m
1 stop
IAH6:29 pmHouston George Bush Intcntl
Jul 7
IAH1:29 pmHouston George Bush Intcntl
19h 24m
1 stop
ISP9:53 amIslip Long Island
$284
Frontier
Jun 24
ISP9:52 pmIslip Long Island
11h 55m
1 stop
IAH8:47 amHouston George Bush Intcntl
Jun 29
IAH7:24 pmHouston George Bush Intcntl
19h 32m
1 stop
ISP3:56 pmIslip Long Island
$301
Frontier
Jun 12
ISP9:52 pmIslip Long Island
11h 55m
1 stop
IAH8:47 amHouston George Bush Intcntl
Jun 16
IAH7:24 pmHouston George Bush Intcntl
24h 33m
1 stop
ISP8:57 pmIslip Long Island
$310

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 May 26, 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

Sat 7/4

10:48 am-6:29 pm

1 stop8h 41m

Houston George Bush Intcntl

Tue 7/7

1:29 pm-9:53 am

1 stop19h 24m

$284

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 6/24

9:52 pm-8:47 am

1 stop11h 55m

Houston George Bush Intcntl

Mon 6/29

7:24 pm-3:56 pm

1 stop19h 32m

$301

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Fri 6/12

9:52 pm-8:47 am

1 stop11h 55m

Houston George Bush Intcntl

Tue 6/16

7:24 pm-8:57 pm

1 stop24h 33m

$310
Quickest round-trip

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Thu 7/30

6:00 am-12:15 pm

1 stop7h 15m

Houston Hobby

Thu 8/6

3:55 pm-10:05 pm

1 stop5h 10m

$322

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Wed 7/29

10:57 am-8:45 am

1 stop22h 48m

Houston George Bush Intcntl

Tue 8/4

1:29 pm-9:53 am

1 stop19h 24m

$323

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Thu 7/30

5:50 pm-12:10 am

2 stops7h 20m

Houston Hobby

Thu 8/6

3:55 pm-10:05 pm

1 stop5h 10m

$327

IslipHouston

ISP - IAH

ISPIAH

Islip Long Island

Sat 6/13

9:52 pm-8:47 am

1 stop11h 55m

Houston George Bush Intcntl

Mon 6/15

7:24 pm-3:56 pm

1 stop19h 32m

$329

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Wed 7/29

6:00 am-4:30 pm

1 stop11h 30m

Houston Hobby

Tue 8/4

6:05 am-4:55 pm

1 stop9h 50m

$331

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Fri 7/31

3:05 pm-10:15 pm

1 stop8h 10m

Houston Hobby

Fri 8/7

3:55 pm-10:05 pm

1 stop5h 10m

$341

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Wed 7/29

2:55 pm-10:15 pm

2 stops8h 20m

Houston Hobby

Tue 8/4

7:20 am-4:55 pm

2 stops8h 35m

$342

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 $331. 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 $448.

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 $378. Try not to purchase tickets in the afternoon because they tend to be around $419. 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 45m

Direct flights

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

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 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
4,266 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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