$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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — HOU
Dec 3 — Dec 101
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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 November 3, 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 November 3, 2026.
This Frontier deal was found by Cheapflights users on 10/31. 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.
Sat 11/214:43 pm -
1 stop8h 42m
Tue 11/245:01 am -
1 stop9h 44m
Deal found 10/31![Frontier logo]()
$276
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1812:00 pm -
2 stops10h 53m
Wed 12/27:39 pm -
1 stop16h 43m
Deal found 11/3![Multiple Airlines logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 10/31. 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.
Tue 12/81:38 pm -
2 stops21h 34m
Sun 12/1310:19 am -
1 stop27h 03m
Deal found 10/31![Multiple Airlines logo]()
$332
This Expedia deal was found by Cheapflights users on 10/31. 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.
Sun 11/224:40 pm -
1 stop17h 44m
Fri 11/275:01 am -
1 stop9h 44m
Deal found 10/31![Frontier logo]()
$368
This Priceline deal was found by Cheapflights users on 11/1. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/214:43 pm -
1 stop8h 42m
Fri 11/275:01 am -
1 stop9h 44m
Deal found 11/1![Frontier logo]()
$379
This Frontier deal was found by Cheapflights users on 10/31. 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 10/31![Frontier logo]()
$380
This Southwest deal was found by Cheapflights users on 10/31. 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 11/215:05 pm -
1 stop8h 15m
Fri 11/275:55 am -
1 stop4h 50m
Deal found 10/31![Southwest logo]()
$408
This Southwest deal was found by Cheapflights users on 11/2. 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.
Wed 12/212:30 pm -
1 stop7h 20m
Sat 12/57:20 am -
2 stops6h 35m
Deal found 11/2![Southwest logo]()
$424
This Southwest deal was found by Cheapflights users on 10/31. 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 11/224:45 pm -
1 stop7h 45m
Fri 11/275:55 am -
1 stop4h 50m
Deal found 10/31![Southwest logo]()
$433
This CheapOair deal was found by Cheapflights users on 11/3. 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 11/196:33 pm -
1 stop20h 01m
Tue 12/14:25 pm -
1 stop29h 15m
Deal found 11/3![Multiple Airlines logo]()
$438
This Southwest deal was found by Cheapflights users on 10/31. 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.
Tue 12/812:30 pm -
2 stops8h 10m
Sun 12/135:55 am -
1 stop10h 10m
Deal found 10/31![Southwest logo]()
$450
This KAYAK deal was found by Cheapflights users on 10/30. 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 12/136:00 am -
1 stop10h 34m
Thu 12/1712:59 pm -
1 stop7h 51m
Deal found 10/30![JetBlue logo]()
$461
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 November 3, 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 November 3, 2026.
This Frontier deal was found by Cheapflights users on 10/31. 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.
Sat 11/214:43 pm -
1 stop8h 42m
Tue 11/245:01 am -
1 stop9h 44m
Deal found 10/31![Frontier logo]()
$276
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1812:00 pm -
2 stops10h 53m
Wed 12/27:39 pm -
1 stop16h 43m
Deal found 11/3![Multiple Airlines logo]()
$326
This Southwest deal was found by Cheapflights users on 11/2. 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.
Wed 12/212:30 pm -
1 stop7h 20m
Sat 12/56:05 am -
1 stop5h 00m
Deal found 11/2![Southwest logo]()
$419
This JetBlue deal was found by Cheapflights users on 10/31. 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 1/306:00 am -
1 stop10h 55m
Wed 2/31:15 pm -
1 stop7h 41m
Deal found 10/31![JetBlue logo]()
$486
This Expedia deal was found by Cheapflights users on 10/31. 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.
Sun 11/224:40 pm -
1 stop17h 44m
Fri 11/275:01 am -
1 stop9h 44m
Deal found 10/31![Frontier logo]()
$368
This CheapOair deal was found by Cheapflights users on 11/3. 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 11/196:33 pm -
1 stop20h 01m
Tue 12/14:25 pm -
1 stop29h 15m
Deal found 11/3![Multiple Airlines logo]()
$438
This Southwest deal was found by Cheapflights users on 10/31. 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.
Tue 12/812:30 pm -
1 stop7h 30m
Sun 12/135:55 am -
1 stop10h 10m
Deal found 10/31![Southwest logo]()
$444
This KAYAK deal was found by Cheapflights users on 10/30. 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.
Sat 12/126:00 am -
1 stop7h 18m
Thu 12/177:00 am -
1 stop9h 42m
Deal found 10/30![JetBlue logo]()
$519
This eDestinos deal was found by Cheapflights users on 10/31. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1812:00 pm -
2 stops10h 53m
Sun 11/226:09 pm -
2 stops20h 36m
Deal found 10/31![Multiple Airlines logo]()
$503
This Southwest deal was found by Cheapflights users on 10/31. 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 11/304:55 pm -
2 stops8h 30m
Mon 12/75:40 am -
1 stop9h 35m
Deal found 10/31![Southwest logo]()
$520
This JetBlue deal was found by Cheapflights users on 11/1. 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 12/166:00 am -
1 stop10h 34m
Wed 12/2312:59 pm -
1 stop7h 51m
Deal found 11/1![JetBlue logo]()
$566
This Mytrip deal was found by Cheapflights users on 11/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2510:44 am -
2 stops22h 03m
Tue 12/297:19 am -
3 stops26h 12m
Deal found 11/2![Multiple Airlines logo]()
$543
This Southwest deal was found by Cheapflights users on 11/1. 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 11/215:05 pm -
2 stops9h 00m
Fri 11/275:20 am -
2 stops9h 15m
Deal found 11/1![Southwest logo]()
$547
This CheapOair deal was found by Cheapflights users on 10/31. 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.
Tue 12/86:00 am -
1 stop18h 04m
Sun 12/134:25 pm -
1 stop28h 39m
Deal found 10/31![JetBlue logo]()
$593
This Southwest deal was found by Cheapflights users on 11/1. 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.
Tue 11/174:05 pm -
1 stop5h 50m
Sat 11/212:15 pm -
2 stops8h 30m
Deal found 11/1![Southwest logo]()
$561
This Southwest deal was found by Cheapflights users on 11/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1812:30 pm -
1 stop7h 20m
Sun 11/225:55 am -
1 stop10h 10m
Deal found 11/3![Southwest logo]()
$562
This Southwest deal was found by Cheapflights users on 11/2. 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.
Fri 12/2512:30 pm -
2 stops8h 10m
Tue 12/297:00 am -
2 stops8h 20m
Deal found 11/2![Southwest logo]()
$577
Last-minute flights from Islip to HoustonDiscover last-minute flight deals from Islip to Houston. Data last updated November 3, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to Houston. Data last updated November 3, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1812:00 pm -
2 stops10h 53m
Wed 12/27:39 pm -
1 stop16h 43m
Deal found 11/3![Multiple Airlines logo]()
$326
This CheapOair deal was found by Cheapflights users on 11/3. 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 11/196:33 pm -
1 stop20h 01m
Tue 12/14:25 pm -
1 stop29h 15m
Deal found 11/3![Multiple Airlines logo]()
$438
This Frontier deal was found by Cheapflights users on 10/31. 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 10/31![Frontier logo]()
$380
This Frontier deal was found by Cheapflights users on 10/31. 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.
Sat 11/214:43 pm -
1 stop8h 42m
Tue 11/245:01 am -
1 stop9h 44m
Deal found 10/31![Frontier logo]()
$276
This Priceline deal was found by Cheapflights users on 11/1. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/214:43 pm -
1 stop8h 42m
Fri 11/275:01 am -
1 stop9h 44m
Deal found 11/1![Frontier logo]()
$379
This Southwest deal was found by Cheapflights users on 10/31. 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 11/215:05 pm -
1 stop8h 15m
Fri 11/275:55 am -
1 stop4h 50m
Deal found 10/31![Southwest logo]()
$408
This Expedia deal was found by Cheapflights users on 10/31. 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.
Sun 11/224:40 pm -
1 stop17h 44m
Fri 11/275:01 am -
1 stop9h 44m
Deal found 10/31![Frontier logo]()
$368
This Southwest deal was found by Cheapflights users on 10/31. 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 11/224:45 pm -
1 stop7h 45m
Fri 11/275:55 am -
1 stop4h 50m
Deal found 10/31![Southwest logo]()
$433
This Southwest deal was found by Cheapflights users on 11/2. 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.
Wed 12/212:30 pm -
1 stop7h 20m
Sat 12/57:20 am -
2 stops6h 35m
Deal found 11/2![Southwest logo]()
$424
This Kiwi.com deal was found by Cheapflights users on 10/31. 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.
Tue 12/81:38 pm -
2 stops21h 34m
Sun 12/1310:19 am -
1 stop27h 03m
Deal found 10/31![Multiple Airlines logo]()
$332
This Southwest deal was found by Cheapflights users on 10/31. 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.
Tue 12/812:30 pm -
2 stops8h 10m
Sun 12/135:55 am -
1 stop10h 10m
Deal found 10/31![Southwest logo]()
$450
This KAYAK deal was found by Cheapflights users on 10/30. 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 12/136:00 am -
1 stop10h 34m
Thu 12/1712:59 pm -
1 stop7h 51m
Deal found 10/30![JetBlue logo]()
$461
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 November 3, 2026.
Search for one-way flight options from Islip to Houston. Find affordable one-way fares based on user searches. Data last updated November 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/31. 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 1/2810:57 am -
2 stops48h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Multiple Airlines logo]()
$119
This Southwest deal was found by Cheapflights users on 11/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/185:40 am -
1 stop8h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Southwest logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 11/2. 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.
Wed 1/1311:43 am -
2 stops27h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Multiple Airlines logo]()
$147
This Southwest deal was found by Cheapflights users on 11/2. 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.
Wed 1/1312:30 pm -
2 stops8h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Southwest logo]()
$151
This Frontier deal was found by Cheapflights users on 11/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/304:40 pm -
1 stop8h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Frontier logo]()
$160
This Southwest deal was found by Cheapflights users on 11/1. 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 12/204:55 pm -
1 stop6h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Southwest logo]()
$171
This Frontier deal was found by Cheapflights users on 11/1. 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
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$180
This KAYAK deal was found by Cheapflights users on 11/1. 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 12/66:00 am -
1 stop10h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![JetBlue logo]()
$207
This Frontier deal was found by Cheapflights users on 11/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/274:40 pm -
1 stop8h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Frontier logo]()
$214
This Kiwi.com deal was found by Cheapflights users on 10/31. 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 12/317:45 pm -
2 stops29h 41m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Multiple Airlines logo]()
$229
This JetBlue deal was found by Cheapflights users on 10/30. 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 11/146:00 am -
1 stop11h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![JetBlue logo]()
$232
This Southwest deal was found by Cheapflights users on 10/31. 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 12/314:05 pm -
1 stop5h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Southwest logo]()
$294
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 November 3, 2026.
Round-trip from | $276 (Frontier) |
|---|---|
One-way from | $119 (Kiwi.com) |
Popular in | December |
Cheapest in | January |
Average price | $403 |
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 November 3, 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 1/28
10:57 am-10:39 am
2 stops48h 42m
Houston George Bush Intcntl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$119
IslipHouston
ISP Islip Long Island - HOU Houston Hobby
ISPHOU
Islip Long Island
Wed 1/13
3:25 pm-9:05 pm
1 stop6h 40m
Houston Hobby
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$146
IslipHouston
ISP Islip Long Island - HOU Houston Hobby
ISPHOU
Islip Long Island
Thu 1/28
3:25 pm-9:05 pm
1 stop6h 40m
Houston Hobby
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$146
IslipHouston
ISP Islip Long Island - HOU Houston Hobby
ISPHOU
Islip Long Island
Sun 12/20
4:55 pm-10:45 pm
1 stop6h 50m
Houston Hobby
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$171
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
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$180
IslipHouston
ISP Islip Long Island - IAH Houston George Bush Intcntl
ISPIAH
Islip Long Island
Thu 12/31
7:45 pm-12:26 am
2 stops29h 41m
Houston George Bush Intcntl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$229
IslipHouston
ISP Islip Long Island - IAH Houston George Bush Intcntl
ISPIAH
Islip Long Island
Sat 11/14
6:00 am-4:05 pm
1 stop11h 05m
Houston George Bush Intcntl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$232
IslipHouston
ISP Islip Long Island - IAH Houston George Bush Intcntl
ISPIAH
Islip Long Island
Sat 11/21
9:40 am-3:28 pm
1 stop6h 48m
Houston George Bush Intcntl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$260
IslipHouston
ISP Islip Long Island - IAH Houston George Bush Intcntl
ISPIAH
Islip Long Island
Thu 12/17
6:00 am-12:07 pm
1 stop7h 07m
Houston George Bush Intcntl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$260
IslipHouston
ISP Islip Long Island - HOU Houston Hobby
ISPHOU
Islip Long Island
Fri 12/18
6:05 am-1:25 pm
2 stops8h 20m
Houston Hobby
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$268
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 November 3, 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.
Comfort
8.0
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Comfort
8.0
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
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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Search flights from Islip to Houston by cabin class
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Islip and Houston flights
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Other flights from Islip
Browse through other flights departing from Islip. Flights are based on user searches made on Cheapflights and were last updated on November 3, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Islip to Houston flights
Consider these flights traveling from Islip to Houston.
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 November 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$266 | Average$474 | FlexibilityNo cancel fee | On-time63% |