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Cheap flights from Islip, New York to Houston from $109

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 10/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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
5:43 pm - 9:14 pmISP  Islip Long Island-IAH Houston George Bush Intcntl
28h 31m1 stop Orlando
Frontier Logo
4:21 pm - 4:58 pmIAH  Houston George Bush Intcntl-ISP Islip Long Island
23h 37m1 stop Orlando
$219Frontier
Mon, Sep 21 - Wed, Sep 30
Southwest Logo
11:55 am - 7:10 pmISP  Islip Long Island-HOU Houston Hobby
8h 15m1 stop Baltimore/Washington
Southwest Logo
7:25 am - 2:30 pmHOU  Houston Hobby-ISP Islip Long Island
6h 05m1 stop Baltimore/Washington
$230Southwest
Sat, Sep 5 - Sat, Sep 12
Southwest Logo
11:55 am - 6:20 pmISP  Islip Long Island-HOU Houston Hobby
7h 25m2 stops Baltimore/Washington Lambert-St Louis
Southwest Logo
5:00 am - 12:05 pmHOU  Houston Hobby-ISP Islip Long Island
6h 05m1 stop Baltimore/Washington
$236Southwest
Sat, Sep 5 - Sat, Sep 12
Frontier Logo
5:43 pm - 9:14 pmISP  Islip Long Island-IAH Houston George Bush Intcntl
28h 31m1 stop Orlando
Frontier Logo
9:04 pm - 4:58 pmIAH  Houston George Bush Intcntl-ISP Islip Long Island
18h 54m2 stops Atlanta Hartsfield-Jackson Orlando
$241Frontier
Mon, Sep 21 - Wed, Sep 30
Frontier Logo
5:43 pm - 9:14 pmISP  Islip Long Island-IAH Houston George Bush Intcntl
28h 31m1 stop Orlando
Frontier Logo
12:21 pm - 4:58 pmIAH  Houston George Bush Intcntl-ISP Islip Long Island
27h 37m1 stop Orlando
$242Frontier
Mon, Sep 21 - Wed, Sep 30
Frontier Logo
5:43 pm - 9:26 amISP  Islip Long Island-IAH Houston George Bush Intcntl
16h 43m1 stop Orlando
Frontier Logo
8:25 pm - 4:58 pmIAH  Houston George Bush Intcntl-ISP Islip Long Island
19h 33m1 stop Orlando
$242Frontier
Thu, Sep 10 - Thu, Oct 1
Frontier Logo
10:57 am - 8:02 amISP  Islip Long Island-IAH Houston George Bush Intcntl
22h 05m1 stop Orlando
Frontier Logo
3:08 pm - 4:58 pmIAH  Houston George Bush Intcntl-ISP Islip Long Island
24h 50m1 stop Orlando
$247Frontier
Sat, Sep 5 - Sat, Sep 12
Frontier Logo
10:57 am - 8:02 amISP  Islip Long Island-IAH Houston George Bush Intcntl
22h 05m1 stop Orlando
Frontier Logo
8:57 am - 9:53 amIAH  Houston George Bush Intcntl-ISP Islip Long Island
23h 56m1 stop Orlando
$293Frontier
Thu, Aug 27 - Sun, Aug 30
Frontier Logo
7:09 pm - 2:32 pmISP  Islip Long Island-IAH Houston George Bush Intcntl
20h 23m1 stop Orlando
Frontier Logo
1:00 pm - 9:53 amIAH  Houston George Bush Intcntl-ISP Islip Long Island
19h 53m1 stop Orlando
$294Frontier
Mon, Aug 31 - Fri, Sep 4
Frontier Logo
5:43 pm - 10:30 pmISP  Islip Long Island-IAH Houston George Bush Intcntl
29h 47m2 stops Orlando Atlanta Hartsfield-Jackson
Frontier Logo
4:21 pm - 4:58 pmIAH  Houston George Bush Intcntl-ISP Islip Long Island
23h 37m1 stop Orlando
$302Frontier
Mon, Sep 21 - Wed, Sep 30

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Southwest flights from Islip, New York to Houston

Our best Southwest deals on Islip, New York to Houston flight tickets
Southwest
Sep 5
ISP11:55 amIslip Long Island
8h 15m
1 stop
HOU7:10 pmHouston Hobby
Sep 12
HOU7:25 amHouston Hobby
6h 05m
1 stop
ISP2:30 pmIslip Long Island
$230
Southwest
Sep 5
ISP11:55 amIslip Long Island
7h 25m
2 stops
HOU6:20 pmHouston Hobby
Sep 12
HOU5:00 amHouston Hobby
6h 05m
1 stop
ISP12:05 pmIslip Long Island
$236
Southwest
Sep 21
ISP5:00 pmIslip Long Island
6h 25m
1 stop
HOU10:25 pmHouston Hobby
Sep 30
HOU6:05 amHouston Hobby
5h 05m
1 stop
ISP12:10 pmIslip Long Island
$315

Frontier flights from Islip, New York to Houston

Our best Frontier deals on Islip, New York to Houston flight tickets
Frontier
Sep 21
ISP5:43 pmIslip Long Island
28h 31m
1 stop
IAH9:14 pmHouston George Bush Intcntl
Sep 30
IAH4:21 pmHouston George Bush Intcntl
23h 37m
1 stop
ISP4:58 pmIslip Long Island
$219
Frontier
Sep 21
ISP5:43 pmIslip Long Island
28h 31m
1 stop
IAH9:14 pmHouston George Bush Intcntl
Sep 30
IAH9:04 pmHouston George Bush Intcntl
18h 54m
2 stops
ISP4:58 pmIslip Long Island
$241
Frontier
Sep 10
ISP5:43 pmIslip Long Island
16h 43m
1 stop
IAH9:26 amHouston George Bush Intcntl
Oct 1
IAH8:25 pmHouston George Bush Intcntl
19h 33m
1 stop
ISP4:58 pmIslip Long Island
$242

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 August 13, 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 Islip Long Island - IAH Houston George Bush Intcntl

ISPIAH

Islip Long Island

Mon 9/21

5:43 pm-9:14 pm

1 stop28h 31m

Houston George Bush Intcntl

Wed 9/30

4:21 pm-4:58 pm

1 stop23h 37m

$219

IslipHouston

ISP Islip Long Island - HOU Houston Hobby

ISPHOU

Islip Long Island

Sat 9/5

11:55 am-7:10 pm

1 stop8h 15m

Houston Hobby

Sat 9/12

7:25 am-2:30 pm

1 stop6h 05m

$230
Quickest round-trip

IslipHouston

ISP Islip Long Island - HOU Houston Hobby

ISPHOU

Islip Long Island

Sat 9/5

11:55 am-6:20 pm

2 stops7h 25m

Houston Hobby

Sat 9/12

5:00 am-12:05 pm

1 stop6h 05m

$236

IslipHouston

ISP Islip Long Island - IAH Houston George Bush Intcntl

ISPIAH

Islip Long Island

Mon 9/21

5:43 pm-9:14 pm

1 stop28h 31m

Houston George Bush Intcntl

Wed 9/30

9:04 pm-4:58 pm

2 stops18h 54m

$241

IslipHouston

ISP Islip Long Island - IAH Houston George Bush Intcntl

ISPIAH

Islip Long Island

Mon 9/21

5:43 pm-9:14 pm

1 stop28h 31m

Houston George Bush Intcntl

Wed 9/30

12:21 pm-4:58 pm

1 stop27h 37m

$242

IslipHouston

ISP Islip Long Island - IAH Houston George Bush Intcntl

ISPIAH

Islip Long Island

Thu 9/10

5:43 pm-9:26 am

1 stop16h 43m

Houston George Bush Intcntl

Thu 10/1

8:25 pm-4:58 pm

1 stop19h 33m

$242

IslipHouston

ISP Islip Long Island - IAH Houston George Bush Intcntl

ISPIAH

Islip Long Island

Sat 9/5

10:57 am-8:02 am

1 stop22h 05m

Houston George Bush Intcntl

Sat 9/12

3:08 pm-4:58 pm

1 stop24h 50m

$247

IslipHouston

ISP Islip Long Island - IAH Houston George Bush Intcntl

ISPIAH

Islip Long Island

Thu 8/27

10:57 am-8:02 am

1 stop22h 05m

Houston George Bush Intcntl

Sun 8/30

8:57 am-9:53 am

1 stop23h 56m

$293

IslipHouston

ISP Islip Long Island - IAH Houston George Bush Intcntl

ISPIAH

Islip Long Island

Mon 8/31

7:09 pm-2:32 pm

1 stop20h 23m

Houston George Bush Intcntl

Fri 9/4

1:00 pm-9:53 am

1 stop19h 53m

$294

IslipHouston

ISP Islip Long Island - IAH Houston George Bush Intcntl

ISPIAH

Islip Long Island

Mon 9/21

5:43 pm-10:30 pm

2 stops29h 47m

Houston George Bush Intcntl

Wed 9/30

4:21 pm-4:58 pm

1 stop23h 37m

$302

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 month to fly to Houston?

The month of September is, on average, the cheapest month to fly to Houston from Islip, New York, with most prices found around $0. The month of June is another great option to travel to Houston, with average flight prices from Islip, New York averaging around $0.

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 Wednesday. momondo users have found tickets for Wednesday departures for as low as $341. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Houston on Monday is $463.

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 $427. Try not to purchase tickets in the afternoon because they tend to be around $484. 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 47m

Direct flights

None
The fastest flight from Islip, New York to Houston takes 6h 47m
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 47m 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
4,218 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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