$119+ Cheap flights from Islip, NY (ISP) to Houston
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/19. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — HOU
Oct 18 — Oct 251
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 September 18, 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 September 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/3112:00 pm -
1 stop8h 40m
Sun 11/18:35 pm -
1 stop20h 21m
Deal found 9/16![Multiple Airlines logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/3112:00 pm -
1 stop8h 40m
Mon 11/29:14 pm -
2 stops37h 06m
Deal found 9/16![Multiple Airlines logo]()
$255
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Wed 10/1412:00 pm -
2 stops20h 19m
Wed 10/214:21 pm -
1 stop24h 09m
Deal found 9/16![Multiple Airlines logo]()
$296
This Frontier deal was found by Cheapflights users on 9/14. 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.
Fri 11/204:40 pm -
1 stop8h 45m
Fri 11/275:01 am -
1 stop9h 44m
Deal found 9/14![Frontier logo]()
$306
This Frontier deal was found by Cheapflights users on 9/18. 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.
Fri 11/204:40 pm -
1 stop8h 45m
Mon 11/235:01 am -
1 stop9h 44m
Deal found 9/18![Frontier logo]()
$313
This Frontier deal was found by Cheapflights users on 9/14. 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.
Fri 11/204:40 pm -
1 stop8h 45m
Sun 11/225:01 am -
1 stop9h 44m
Deal found 9/14![Frontier logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/2910:57 am -
1 stop9h 43m
Thu 11/59:14 pm -
2 stops37h 06m
Deal found 9/15![Multiple Airlines logo]()
$336
This Southwest deal was found by Cheapflights users on 9/16. 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.
Wed 10/144:20 pm -
1 stop5h 35m
Wed 10/2110:55 am -
2 stops8h 05m
Deal found 9/16![Southwest logo]()
$336
This Southwest deal was found by Cheapflights users on 9/16. 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 10/3111:30 am -
1 stop6h 15m
Sun 11/15:55 am -
1 stop4h 50m
Deal found 9/16![Southwest logo]()
$345
This CheapOair deal was found by Cheapflights users on 9/15. 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 10/296:33 pm -
1 stop28h 04m
Thu 11/58:35 pm -
1 stop20h 21m
Deal found 9/15![Frontier logo]()
$358
This Frontier deal was found by Cheapflights users on 9/14. 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.
Thu 12/39:56 am -
1 stop11h 01m
Sun 12/68:10 pm -
1 stop11h 51m
Deal found 9/14![Frontier logo]()
$370
This Southwest deal was found by Cheapflights users on 9/14. 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.
Mon 10/125:40 pm -
1 stop7h 35m
Mon 10/195:25 am -
1 stop8h 05m
Deal found 9/14![Southwest logo]()
$438
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 September 18, 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 September 18, 2026.
This Frontier deal was found by Cheapflights users on 9/14. 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.
Fri 11/204:40 pm -
1 stop8h 45m
Fri 11/275:01 am -
1 stop9h 44m
Deal found 9/14![Frontier logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/2910:57 am -
1 stop9h 43m
Thu 11/59:14 pm -
2 stops37h 06m
Deal found 9/15![Multiple Airlines logo]()
$336
This Southwest deal was found by Cheapflights users on 9/16. 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.
Wed 10/144:20 pm -
1 stop5h 35m
Wed 10/2110:55 am -
2 stops8h 05m
Deal found 9/16![Southwest logo]()
$336
This JetBlue deal was found by Cheapflights users on 9/17. 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 10/256:00 am -
1 stop6h 50m
Thu 10/2912:44 pm -
1 stop7h 53m
Deal found 9/17![JetBlue logo]()
$555
This Southwest deal was found by Cheapflights users on 9/16. 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 10/3111:30 am -
1 stop6h 15m
Sun 11/13:00 pm -
2 stops7h 30m
Deal found 9/16![Southwest logo]()
$351
This CheapOair deal was found by Cheapflights users on 9/15. 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 10/296:33 pm -
1 stop28h 04m
Thu 11/58:35 pm -
1 stop20h 21m
Deal found 9/15![Frontier logo]()
$358
This CheapOair deal was found by Cheapflights users on 9/17. 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 10/146:00 am -
1 stop17h 49m
Wed 10/2112:21 pm -
1 stop28h 09m
Deal found 9/17![Multiple Airlines logo]()
$456
This Southwest deal was found by Cheapflights users on 9/14. 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 2/1210:00 am -
1 stop10h 55m
Mon 2/226:45 am -
1 stop8h 10m
Deal found 9/14![Southwest logo]()
$425
This Frontier deal was found by Cheapflights users on 9/15. 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.
Thu 11/56:33 pm -
2 stops18h 01m
Sun 11/89:14 pm -
2 stops19h 42m
Deal found 9/15![Frontier logo]()
$495
This Southwest deal was found by Cheapflights users on 9/17. 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 10/27:10 pm -
1 stop6h 05m
Tue 10/66:05 am -
1 stop6h 05m
Deal found 9/17![Southwest logo]()
$465
This JetBlue deal was found by Cheapflights users on 9/17. 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 12/136:00 am -
1 stop7h 18m
Thu 12/171:00 pm -
1 stop7h 59m
Deal found 9/17![JetBlue logo]()
$644
This Southwest deal was found by Cheapflights users on 9/14. 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.
Mon 10/125:40 pm -
1 stop7h 35m
Mon 10/193:20 pm -
2 stops7h 20m
Deal found 9/14![Southwest logo]()
$498
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
Mon 10/126:55 pm -
1 stop27h 43m
Mon 10/1910:12 am -
1 stop24h 08m
Deal found 9/14![Multiple Airlines logo]()
$621
This KAYAK deal was found by Cheapflights users on 9/17. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/47:00 am -
1 stop9h 47m
Sat 10/1011:25 am -
1 stop9h 12m
Deal found 9/17![JetBlue logo]()
$730
This Southwest deal was found by Cheapflights users on 9/15. 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 10/23:10 pm -
1 stop6h 30m
Sun 10/48:40 pm -
1 stop12h 40m
Deal found 9/15![Southwest logo]()
$552
This CheapOair deal was found by Cheapflights users on 9/16. 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 2/2511:59 am -
2 stops12h 14m
Mon 3/811:50 am -
2 stops28h 05m
Deal found 9/16![Multiple Airlines logo]()
$779
This JetBlue deal was found by Cheapflights users on 9/14. 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 2/235:55 am -
1 stop6h 52m
Tue 3/21:00 pm -
1 stop7h 27m
Deal found 9/14![JetBlue logo]()
$801
Last-minute flights from Islip to HoustonDiscover last-minute flight deals from Islip to Houston. Data last updated September 18, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to Houston. Data last updated September 18, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 9/14. 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 stop28h 31m
Mon 9/288:25 pm -
1 stop19h 33m
Deal found 9/14![Frontier logo]()
$408
This Frontier deal was found by Cheapflights users on 9/17. 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.
Mon 9/285:43 pm -
1 stop28h 31m
Fri 10/212:21 pm -
1 stop27h 37m
Deal found 9/17![Frontier logo]()
$418
This Southwest deal was found by Cheapflights users on 9/14. 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.
Mon 10/125:40 pm -
1 stop7h 35m
Mon 10/195:25 am -
1 stop8h 05m
Deal found 9/14![Southwest logo]()
$438
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Wed 10/1412:00 pm -
2 stops20h 19m
Wed 10/214:21 pm -
1 stop24h 09m
Deal found 9/16![Multiple Airlines logo]()
$296
This Southwest deal was found by Cheapflights users on 9/16. 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.
Wed 10/144:20 pm -
1 stop5h 35m
Wed 10/2110:55 am -
2 stops8h 05m
Deal found 9/16![Southwest logo]()
$336
This Frontier deal was found by Cheapflights users on 9/14. 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.
Thu 10/156:25 pm -
2 stops17h 57m
Fri 10/169:12 pm -
2 stops19h 18m
Deal found 9/14![Frontier logo]()
$436
This Frontier deal was found by Cheapflights users on 9/17. 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 10/256:25 pm -
2 stops17h 57m
Thu 10/299:14 pm -
2 stops19h 42m
Deal found 9/17![Frontier logo]()
$433
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/2910:57 am -
1 stop9h 43m
Thu 11/59:14 pm -
2 stops37h 06m
Deal found 9/15![Multiple Airlines logo]()
$336
This CheapOair deal was found by Cheapflights users on 9/15. 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 10/296:33 pm -
1 stop28h 04m
Thu 11/58:35 pm -
1 stop20h 21m
Deal found 9/15![Frontier logo]()
$358
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/3112:00 pm -
1 stop8h 40m
Sun 11/18:35 pm -
1 stop20h 21m
Deal found 9/16![Multiple Airlines logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/3112:00 pm -
1 stop8h 40m
Mon 11/29:14 pm -
2 stops37h 06m
Deal found 9/16![Multiple Airlines logo]()
$255
This Southwest deal was found by Cheapflights users on 9/16. 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 10/3111:30 am -
1 stop6h 15m
Sun 11/15:55 am -
1 stop4h 50m
Deal found 9/16![Southwest logo]()
$345
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 September 18, 2026.
Search for one-way flight options from Islip to Houston. Find affordable one-way fares based on user searches. Data last updated September 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Mon 10/196:55 pm -
2 stops28h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Mon 10/193:02 pm -
3 stops32h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Multiple Airlines logo]()
$163
This Frontier deal was found by Cheapflights users on 9/16. 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 11/16:33 pm -
2 stops18h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Frontier logo]()
$208
This KAYAK deal was found by Cheapflights users on 9/17. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:00 am -
1 stop6h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![JetBlue logo]()
$285
This JetBlue deal was found by Cheapflights users on 9/18. 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 11/249:40 am -
1 stop6h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![JetBlue logo]()
$288
This Frontier deal was found by Cheapflights users on 9/13. 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.
Wed 11/254:40 pm -
1 stop8h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Frontier logo]()
$319
This JetBlue deal was found by Cheapflights users on 9/17. 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.
Mon 11/239:40 am -
1 stop6h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![JetBlue logo]()
$320
This Frontier deal was found by Cheapflights users on 9/14. 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.
Thu 10/296:33 pm -
2 stops18h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Frontier logo]()
$344
This Frontier deal was found by Cheapflights users on 9/15. 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 11/294:40 pm -
1 stop8h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$385
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 September 18, 2026.
Round-trip from | $254 (Kiwi.com) |
|---|---|
One-way from | $119 (Kiwi.com) |
Popular in | July |
Cheapest in | November |
Average price | $343 |
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 7,457,451 searches. Data last updated September 18, 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
Mon 10/19
6:55 pm-10:23 pm
2 stops28h 28m
Houston George Bush Intcntl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$119
Quickest round-trip
IslipHouston
ISP Islip Long Island - IAH Houston George Bush Intcntl
ISPIAH
Islip Long Island
Fri 11/20
9:40 am-3:34 pm
1 stop6h 54m
Houston George Bush Intcntl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$288
IslipHouston
ISP Islip Long Island - IAH Houston George Bush Intcntl
ISPIAH
Islip Long Island
Sun 10/11
6:25 pm-11:22 am
2 stops17h 57m
Houston George Bush Intcntl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$288
IslipHouston
ISP Islip Long Island - IAH Houston George Bush Intcntl
ISPIAH
Islip Long Island
Tue 11/24
9:40 am-3:34 pm
1 stop6h 54m
Houston George Bush Intcntl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$288
IslipHouston
ISP Islip Long Island - IAH Houston George Bush Intcntl
ISPIAH
Islip Long Island
Wed 11/25
4:40 pm-12:25 am
1 stop8h 45m
Houston George Bush Intcntl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$319
IslipHouston
ISP Islip Long Island - IAH Houston George Bush Intcntl
ISPIAH
Islip Long Island
Mon 11/23
9:40 am-3:34 pm
1 stop6h 54m
Houston George Bush Intcntl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$320
IslipHouston
ISP Islip Long Island - IAH Houston George Bush Intcntl
ISPIAH
Islip Long Island
Fri 11/20
4:40 pm-12:25 am
1 stop8h 45m
Houston George Bush Intcntl
Fri 11/27
5:01 am-3:45 pm
1 stop9h 44m
$329
IslipHouston
ISP Islip Long Island - IAH Houston George Bush Intcntl
ISPIAH
Islip Long Island
Thu 10/29
10:57 am-7:40 pm
1 stop9h 43m
Houston George Bush Intcntl
Thu 11/5
9:14 pm-11:20 am
2 stops37h 06m
$336
IslipHouston
ISP Islip Long Island - HOU Houston Hobby
ISPHOU
Islip Long Island
Wed 10/14
4:20 pm-8:55 pm
1 stop5h 35m
Houston Hobby
Wed 10/21
10:55 am-8:00 pm
2 stops8h 05m
$336
IslipHouston
ISP Islip Long Island - HOU Houston Hobby
ISPHOU
Islip Long Island
Sat 10/31
11:30 am-4:45 pm
1 stop6h 15m
Houston Hobby
Sun 11/1
3:00 pm-11:30 pm
2 stops7h 30m
$351
Showing 1-10 of 24 resultsSorted by cheapest first
Best time to book a flight from Islip to Houston
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ISP-HO1
ISP-IAH
ISP-HOU
Estimated round-trip price
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Cheapflights Insights
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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 September 18, 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.
Entertainment
7.5
Boarding
8.1
Crew
8.6
Comfort
8.0
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Entertainment
7.5
Boarding
8.1
Crew
8.6
Comfort
8.0
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Related info for your journey
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Islip and Houston flights
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Other flights from Islip
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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 7,457,451 searches. Data last updated September 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$266 | Average$474 | FlexibilityNo cancel fee | On-time63% |