$107+ Cheap flights from Islip, NY (ISP) to Houston
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — HOU
Sep 6 — Sep 131
Round-trip
1 adult, Economy
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Find cheap flights from Islip to Houston with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Islip to Houston
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Cheapest flights from Islip to HoustonExplore the most affordable flight options available from Islip to Houston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 7, 2026.
Explore the most affordable flight options available from Islip to Houston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 7, 2026.
This CheapOair deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:09 pm -
1 stop22h 05m
Tue 9/81:45 pm -
1 stop26h 13m
Deal found 8/6![Frontier logo]()
$206
This Expedia deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/294:13 pm -
1 stop29h 07m
Mon 11/24:39 pm -
1 stop20h 54m
Deal found 8/6![Frontier logo]()
$210
This CheapOair deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:43 pm -
1 stop28h 31m
Thu 10/112:21 pm -
1 stop27h 37m
Deal found 8/3![Frontier logo]()
$220
This CheapOair deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/67:09 pm -
1 stop13h 53m
Tue 9/81:45 pm -
1 stop26h 13m
Deal found 8/6![Frontier logo]()
$224
This Trip.com deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/115:43 pm -
1 stop16h 42m
Tue 9/1512:21 pm -
1 stop27h 37m
Deal found 8/5![Frontier logo]()
$231
This Trip.com deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2710:57 am -
1 stop22h 05m
Wed 9/21:45 pm -
1 stop27h 29m
Deal found 8/6![Frontier logo]()
$232
This CheapOair deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/410:57 am -
1 stop28h 35m
Tue 9/81:45 pm -
1 stop26h 13m
Deal found 8/6![Frontier logo]()
$238
This CheapOair deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/214:13 pm -
1 stop29h 51m
Sat 10/2412:21 pm -
1 stop20h 12m
Deal found 8/5![Frontier logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:43 pm -
2 stops29h 47m
Mon 9/288:25 pm -
1 stop19h 33m
Deal found 8/2![Frontier logo]()
$261
This CheapOair deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/283:43 pm -
1 stop29h 37m
Sun 11/112:21 pm -
1 stop25h 12m
Deal found 8/6![Frontier logo]()
$267
This Kiwi.com deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/510:57 am -
1 stop22h 05m
Tue 9/86:00 am -
2 stops28h 20m
Deal found 8/6![Multiple Airlines logo]()
$284
This Southwest deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/115:00 pm -
1 stop6h 25m
Tue 9/156:05 am -
1 stop5h 05m
Deal found 8/5![Southwest logo]()
$285
Best flights from Islip to HoustonDiscover carefully curated flight deals from Islip to Houston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 7, 2026.
Discover carefully curated flight deals from Islip to Houston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:43 pm -
2 stops29h 47m
Mon 9/288:25 pm -
1 stop19h 33m
Deal found 8/2![Frontier logo]()
$261
This Southwest deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/115:00 pm -
1 stop6h 25m
Tue 9/156:05 am -
1 stop5h 05m
Deal found 8/5![Southwest logo]()
$285
This JetBlue deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/296:00 am -
1 stop6h 47m
Sun 9/61:00 pm -
1 stop8h 04m
Deal found 8/6![JetBlue logo]()
$307
This CheapOair deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/283:43 pm -
1 stop29h 37m
Sun 11/112:21 pm -
1 stop25h 12m
Deal found 8/6![Frontier logo]()
$267
This Southwest deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/246:10 am -
1 stop7h 05m
Mon 9/2810:05 am -
1 stop5h 20m
Deal found 8/2![Southwest logo]()
$295
This JetBlue deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/34:58 pm -
1 stop7h 01m
Thu 9/1012:58 pm -
1 stop9h 24m
Deal found 8/6![JetBlue logo]()
$307
This JetBlue deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/66:00 am -
1 stop6h 47m
Thu 9/1012:58 pm -
1 stop9h 24m
Deal found 8/6![JetBlue logo]()
$307
This JetBlue deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:00 am -
1 stop6h 47m
Sun 9/61:00 pm -
1 stop8h 04m
Deal found 8/6![JetBlue logo]()
$307
This Southwest deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/511:55 am -
2 stops7h 25m
Tue 9/811:20 am -
1 stop8h 50m
Deal found 8/7![Southwest logo]()
$348
This Southwest deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/612:20 pm -
1 stop6h 00m
Tue 9/812:30 pm -
2 stops7h 40m
Deal found 8/6![Southwest logo]()
$352
This JetBlue deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:00 am -
1 stop6h 47m
Thu 9/1012:58 pm -
1 stop9h 24m
Deal found 8/4![JetBlue logo]()
$337
This Southwest deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/312:30 pm -
2 stops8h 20m
Sun 12/65:55 am -
1 stop4h 50m
Deal found 8/2![Southwest logo]()
$352
This JetBlue deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:00 am -
1 stop6h 47m
Wed 10/281:00 pm -
1 stop7h 37m
Deal found 8/3![JetBlue logo]()
$337
This Southwest deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/271:15 pm -
2 stops10h 05m
Wed 9/211:20 am -
2 stops8h 45m
Deal found 8/6![Southwest logo]()
$357
This Justfly.com deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/157:00 am -
1 stop15h 55m
Wed 9/166:15 am -
1 stop16h 07m
Deal found 8/4![JetBlue logo]()
$354
This JetBlue deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/117:00 am -
1 stop9h 47m
Mon 9/1412:58 pm -
1 stop9h 24m
Deal found 8/5![JetBlue logo]()
$366
Last-minute flights from Islip to HoustonDiscover last-minute flight deals from Islip to Houston. Data last updated August 7, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to Houston. Data last updated August 7, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2710:57 am -
1 stop22h 05m
Wed 9/21:45 pm -
1 stop27h 29m
Deal found 8/6![Frontier logo]()
$232
This Southwest deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:10 am -
1 stop7h 05m
Wed 9/28:00 am -
1 stop7h 55m
Deal found 8/6![Southwest logo]()
$295
This CheapOair deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/410:57 am -
1 stop28h 35m
Tue 9/81:45 pm -
1 stop26h 13m
Deal found 8/6![Frontier logo]()
$238
This CheapOair deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:09 pm -
1 stop22h 05m
Tue 9/81:45 pm -
1 stop26h 13m
Deal found 8/6![Frontier logo]()
$206
This Kiwi.com deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/510:57 am -
1 stop22h 05m
Tue 9/86:00 am -
2 stops28h 20m
Deal found 8/6![Multiple Airlines logo]()
$284
This CheapOair deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/67:09 pm -
1 stop13h 53m
Tue 9/81:45 pm -
1 stop26h 13m
Deal found 8/6![Frontier logo]()
$224
This CheapOair deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:43 pm -
1 stop28h 31m
Thu 10/112:21 pm -
1 stop27h 37m
Deal found 8/3![Frontier logo]()
$220
This Kiwi.com deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:43 pm -
1 stop28h 31m
Mon 9/148:25 pm -
2 stops15h 33m
Deal found 8/4![Multiple Airlines logo]()
$303
This Trip.com deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/115:43 pm -
1 stop16h 42m
Tue 9/1512:21 pm -
1 stop27h 37m
Deal found 8/5![Frontier logo]()
$231
This Southwest deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/115:00 pm -
1 stop6h 25m
Tue 9/156:05 am -
1 stop5h 05m
Deal found 8/5![Southwest logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1111:52 am -
1 stop8h 34m
Tue 9/156:28 am -
2 stops27h 52m
Deal found 8/5![Multiple Airlines logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:43 pm -
2 stops29h 47m
Mon 9/288:25 pm -
1 stop19h 33m
Deal found 8/2![Frontier logo]()
$261
One-way flights from Islip to HoustonSearch for one-way flight options from Islip to Houston. Find affordable one-way fares based on user searches. Data last updated August 7, 2026.
Search for one-way flight options from Islip to Houston. Find affordable one-way fares based on user searches. Data last updated August 7, 2026.
This Trip.com deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:43 pm -
1 stop28h 31m
Deal found 8/4![Frontier logo]()
$107
This Trip.com deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:43 pm -
1 stop28h 31m
Deal found 8/6![Frontier logo]()
$108
This Trip.com deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/255:43 pm -
1 stop16h 42m
Deal found 8/5![Frontier logo]()
$121
This Frontier deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/118:55 pm -
1 stop12h 43m
Deal found 8/5![Frontier logo]()
$122
This Southwest deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/246:10 am -
1 stop7h 05m
Deal found 8/6![Southwest logo]()
$148
This Southwest deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/153:10 pm -
1 stop10h 00m
Deal found 8/4![Southwest logo]()
$153
This JetBlue deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/274:58 pm -
1 stop7h 01m
Deal found 8/5![JetBlue logo]()
$154
This Southwest deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/254:05 pm -
1 stop5h 20m
Deal found 8/5![Southwest logo]()
$162
This JetBlue deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/306:00 am -
1 stop6h 47m
Deal found 8/2![JetBlue logo]()
$163
This Expedia deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:09 pm -
1 stop13h 53m
Deal found 8/6![Frontier logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2511:52 am -
2 stops35h 38m
Deal found 8/5![Multiple Airlines logo]()
$188
This JetBlue deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/117:00 am -
1 stop9h 47m
Deal found 8/2![JetBlue logo]()
$227
Find flight deals from Islip to Houston
Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Houston (HO1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 7, 2026.
Most accurate provider | Expedia 1 star |
|---|---|
Most trusted provider | Expedia 3 stars |
Round-trip from | $206 (CheapOair) |
One-way from | $107 (Trip.com) |
Popular in | March |
Cheapest in | January |
Average price | $319 |
Cheapflights Fare Finder
Customize your flight search to find flights from Islip 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, Cheapflights users made 2,558,603 searches. Data last updated August 7, 2026.
Use the filters below to find and compare flights from Islip to Houston that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
IslipHouston
ISP Islip Long Island - IAH Houston George Bush Intcntl
ISPIAH
Islip Long Island
Thu 9/24
5:43 pm-10:30 pm
2 stops29h 47m
Houston George Bush Intcntl
Mon 9/28
8:25 pm-4:58 pm
1 stop19h 33m
$261
IslipHouston
ISP Islip Long Island - IAH Houston George Bush Intcntl
ISPIAH
Islip Long Island
Wed 10/28
3:43 pm-8:20 pm
1 stop29h 37m
Houston George Bush Intcntl
Sun 11/1
12:21 pm-2:33 pm
1 stop25h 12m
$267
Quickest round-trip
IslipHouston
ISP Islip Long Island - HOU Houston Hobby
ISPHOU
Islip Long Island
Fri 9/11
5:00 pm-10:25 pm
1 stop6h 25m
Houston Hobby
Tue 9/15
6:05 am-12:10 pm
1 stop5h 05m
$285
IslipHouston
ISP Islip Long Island - HOU Houston Hobby
ISPHOU
Islip Long Island
Thu 9/24
6:10 am-12:15 pm
1 stop7h 05m
Houston Hobby
Mon 9/28
10:05 am-4:25 pm
1 stop5h 20m
$295
IslipHouston
ISP Islip Long Island - IAH Houston George Bush Intcntl
ISPIAH
Islip Long Island
Sat 8/29
6:00 am-11:47 am
1 stop6h 47m
Houston George Bush Intcntl
Sun 9/6
1:00 pm-10:04 pm
1 stop8h 04m
$307
IslipHouston
ISP Islip Long Island - IAH Houston George Bush Intcntl
ISPIAH
Islip Long Island
Thu 9/3
4:58 pm-10:59 pm
1 stop7h 01m
Houston George Bush Intcntl
Thu 9/10
12:58 pm-11:22 pm
1 stop9h 24m
$307
IslipHouston
ISP Islip Long Island - IAH Houston George Bush Intcntl
ISPIAH
Islip Long Island
Sun 9/6
6:00 am-11:47 am
1 stop6h 47m
Houston George Bush Intcntl
Thu 9/10
12:58 pm-11:22 pm
1 stop9h 24m
$307
IslipHouston
ISP Islip Long Island - IAH Houston George Bush Intcntl
ISPIAH
Islip Long Island
Fri 8/28
6:00 am-11:47 am
1 stop6h 47m
Houston George Bush Intcntl
Sun 9/6
1:00 pm-10:04 pm
1 stop8h 04m
$307
IslipHouston
ISP Islip Long Island - IAH Houston George Bush Intcntl
ISPIAH
Islip Long Island
Tue 9/8
6:00 am-11:47 am
1 stop6h 47m
Houston George Bush Intcntl
Thu 9/10
12:58 pm-11:22 pm
1 stop9h 24m
$337
IslipHouston
ISP Islip Long Island - IAH Houston George Bush Intcntl
ISPIAH
Islip Long Island
Wed 10/14
6:00 am-11:47 am
1 stop6h 47m
Houston George Bush Intcntl
Wed 10/28
1:00 pm-9:37 pm
1 stop7h 37m
$337
Showing 1-10 of 33 resultsSorted by cheapest first
Best time to book a flight from Islip to Houston
Have a flexible travel schedule? Discover the best time to fly to Houston from Islip with our price prediction graph.
ISP-HO1
ISP-IAH
ISP-HOU
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Islip to Houston
ISP-HO1
ISP-IAH
ISP-HOU
No data available for this route at this time. Please check back soon.
Reviews of airlines servicing Houston
Get insights into the airlines that provide service to Houston. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Houston. Reviews last updated August 7, 2026.
Get a feel of what it's like to fly with Southwest from Islip to Houston by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Food
7.0
Entertainment
7.5
Boarding
8.1
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Crew
8.6
Food
7.0
Entertainment
7.5
Boarding
8.1
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Related info for your journey
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Alternative routes for Islip to Houston
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Complete your trip
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Islip and Houston flights
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Other flights from Islip
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Islip to Houston flights
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Top airline flying from Islip to Houston
Discover the top airline that operate flights from Islip to Houston. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$266 | Average$474 | FlexibilityNo cancel fee | On-time63% |