$111+ Cheap flights from Houston to Islip, NY (ISP)
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 5/29. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ISP
Jun 8 — Jun 151
Round-trip
1 adult, Economy
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Find cheap flights from Houston to Islip with Cheapflights
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Cheapest flights from Houston to IslipExplore the most affordable flight options available from Houston to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 9, 2026.
Explore the most affordable flight options available from Houston to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 9, 2026.
This Expedia deal was found by Cheapflights users on 5/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/187:24 pm
IAH
- ISP
1 stop13h 39m
Frontier
Wed 7/2910:48 am
ISP
- IAH
1 stop8h 37m
Frontier
Deal found 5/5![Frontier logo]()
$230
This Mytrip deal was found by Cheapflights users on 5/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/107:24 pm
IAH
- ISP
1 stop24h 33m
Frontier
Wed 6/249:52 pm
ISP
- IAH
1 stop11h 55m
Frontier
Deal found 5/6![Frontier logo]()
$240
This Frontier deal was found by Cheapflights users on 5/6. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/251:07 pm
IAH
- ISP
1 stop6h 50m
Frontier
Wed 7/19:52 pm
ISP
- IAH
1 stop11h 55m
Frontier
Deal found 5/6![Frontier logo]()
$264
This Frontier deal was found by Cheapflights users on 5/5. 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.
Thu 6/181:07 pm
IAH
- ISP
1 stop6h 50m
Frontier
Fri 6/269:52 pm
ISP
- IAH
1 stop11h 55m
Frontier
Deal found 5/5![Frontier logo]()
$270
This Expedia deal was found by Cheapflights users on 5/6. 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 6/47:28 pm
IAH
- ISP
1 stop13h 37m
Frontier
Mon 6/811:00 am
ISP
- IAH
1 stop22h 47m
Frontier
Deal found 5/6![Frontier logo]()
$290
This Expedia deal was found by Cheapflights users on 5/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/187:44 pm
IAH
- ISP
1 stop14h 16m
Frontier
Thu 5/2811:00 am
ISP
- IAH
1 stop8h 33m
Frontier
Deal found 5/4![Frontier logo]()
$300
This Southwest deal was found by Cheapflights users on 5/6. 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 6/48:35 pm
HOU
- ISP
1 stop10h 45m
Southwest
Mon 6/85:50 pm
ISP
- HOU
2 stops7h 15m
Southwest
Deal found 5/6![Southwest logo]()
$314
This Southwest deal was found by Cheapflights users on 5/4. 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.
Mon 6/88:35 pm
HOU
- ISP
1 stop10h 30m
Southwest
Fri 6/126:00 am
ISP
- HOU
1 stop7h 15m
Southwest
Deal found 5/4![Southwest logo]()
$327
This Expedia deal was found by Cheapflights users on 5/8. 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 6/57:44 pm
IAH
- ISP
1 stop13h 31m
Frontier
Fri 6/129:52 pm
ISP
- IAH
1 stop11h 55m
Frontier
Deal found 5/8![Frontier logo]()
$335
This Southwest deal was found by Cheapflights users on 5/7. 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.
Thu 6/118:40 pm
HOU
- ISP
1 stop12h 50m
Southwest
Mon 6/156:05 pm
ISP
- HOU
1 stop6h 40m
Southwest
Deal found 5/7![Southwest logo]()
$346
This Southwest deal was found by Cheapflights users on 5/5. 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.
Sat 7/185:25 am
HOU
- ISP
1 stop8h 25m
Southwest
Wed 7/298:55 am
ISP
- HOU
1 stop8h 35m
Southwest
Deal found 5/5![Southwest logo]()
$349
This Expedia deal was found by Cheapflights users on 5/8. 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 6/77:28 pm
IAH
- ISP
1 stop13h 37m
Frontier
Sun 6/149:52 pm
ISP
- IAH
1 stop11h 55m
Frontier
Deal found 5/8![Frontier logo]()
$355
Best flights from Houston to IslipDiscover carefully curated flight deals from Houston to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 9, 2026.
Discover carefully curated flight deals from Houston to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 9, 2026.
This Expedia deal was found by Cheapflights users on 5/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/187:24 pm
IAH
- ISP
1 stop13h 39m
Frontier
Wed 7/2910:48 am
ISP
- IAH
1 stop8h 37m
Frontier
Deal found 5/5![Frontier logo]()
$230
This Southwest deal was found by Cheapflights users on 5/6. 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 6/48:35 pm
HOU
- ISP
1 stop10h 45m
Southwest
Mon 6/85:50 pm
ISP
- HOU
2 stops7h 15m
Southwest
Deal found 5/6![Southwest logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 5/4. 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 7/167:24 pm
IAH
- ISP
1 stop13h 34m
Multiple Airlines
Sun 7/197:49 pm
ISP
- IAH
2 stops27h 50m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$415
This Frontier deal was found by Cheapflights users on 5/5. 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.
Thu 6/181:07 pm
IAH
- ISP
1 stop6h 50m
Frontier
Mon 6/229:52 pm
ISP
- IAH
1 stop11h 55m
Frontier
Deal found 5/5![Frontier logo]()
$270
This Southwest deal was found by Cheapflights users on 5/4. 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.
Mon 6/88:35 pm
HOU
- ISP
1 stop10h 30m
Southwest
Fri 6/125:50 pm
ISP
- HOU
2 stops7h 15m
Southwest
Deal found 5/4![Southwest logo]()
$333
This Expedia deal was found by Cheapflights users on 5/6. 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 6/191:07 pm
IAH
- ISP
1 stop6h 50m
Frontier
Mon 6/229:52 pm
ISP
- IAH
1 stop11h 55m
Frontier
Deal found 5/6![Frontier logo]()
$335
This Southwest deal was found by Cheapflights users on 5/7. 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.
Thu 6/118:40 pm
HOU
- ISP
1 stop12h 50m
Southwest
Mon 6/156:05 pm
ISP
- HOU
1 stop6h 40m
Southwest
Deal found 5/7![Southwest logo]()
$346
This Southwest deal was found by Cheapflights users on 5/5. 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.
Sat 7/181:20 pm
HOU
- ISP
2 stops8h 50m
Southwest
Wed 7/298:55 am
ISP
- HOU
1 stop8h 35m
Southwest
Deal found 5/5![Southwest logo]()
$349
This Frontier deal was found by Cheapflights users on 5/5. 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.
Fri 6/261:07 pm
IAH
- ISP
1 stop6h 50m
Frontier
Sun 6/289:52 pm
ISP
- IAH
1 stop11h 55m
Frontier
Deal found 5/5![Frontier logo]()
$355
This Southwest deal was found by Cheapflights users on 5/8. 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 6/53:35 pm
HOU
- ISP
2 stops7h 00m
Southwest
Fri 6/123:05 pm
ISP
- HOU
2 stops7h 50m
Southwest
Deal found 5/8![Southwest logo]()
$375
This Frontier deal was found by Cheapflights users on 5/8. 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 6/111:07 pm
IAH
- ISP
1 stop6h 50m
Frontier
Mon 6/299:52 pm
ISP
- IAH
1 stop11h 55m
Frontier
Deal found 5/8![Frontier logo]()
$395
This Kiwi.com deal was found by Cheapflights users on 5/8. 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 6/59:50 am
IAH
- ISP
2 stops23h 25m
Frontier
Fri 6/129:52 pm
ISP
- IAH
1 stop11h 55m
Frontier
Deal found 5/8![Frontier logo]()
$424
This Expedia deal was found by Cheapflights users on 5/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/167:24 pm
IAH
- ISP
1 stop13h 34m
Frontier
Sun 7/1910:48 am
ISP
- IAH
1 stop8h 37m
Frontier
Deal found 5/4![Frontier logo]()
$445
Last-minute flights from Houston to IslipDiscover last-minute flight deals from Houston to Islip. Data last updated May 9, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Islip. Data last updated May 9, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 5/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/187:44 pm
IAH
- ISP
1 stop14h 16m
Frontier
Thu 5/2811:00 am
ISP
- IAH
1 stop8h 33m
Frontier
Deal found 5/4![Frontier logo]()
$300
This Expedia deal was found by Cheapflights users on 5/6. 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 6/47:28 pm
IAH
- ISP
1 stop13h 37m
Frontier
Mon 6/811:00 am
ISP
- IAH
1 stop22h 47m
Frontier
Deal found 5/6![Frontier logo]()
$290
This Southwest deal was found by Cheapflights users on 5/6. 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 6/48:35 pm
HOU
- ISP
1 stop10h 45m
Southwest
Mon 6/85:50 pm
ISP
- HOU
2 stops7h 15m
Southwest
Deal found 5/6![Southwest logo]()
$314
This Expedia deal was found by Cheapflights users on 5/8. 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 6/57:44 pm
IAH
- ISP
1 stop13h 31m
Frontier
Fri 6/129:52 pm
ISP
- IAH
1 stop11h 55m
Frontier
Deal found 5/8![Frontier logo]()
$335
This Southwest deal was found by Cheapflights users on 5/8. 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 6/53:25 pm
HOU
- ISP
1 stop7h 10m
Southwest
Fri 6/123:05 pm
ISP
- HOU
2 stops7h 50m
Southwest
Deal found 5/8![Southwest logo]()
$370
This Expedia deal was found by Cheapflights users on 5/8. 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 6/77:28 pm
IAH
- ISP
1 stop13h 37m
Frontier
Sun 6/149:52 pm
ISP
- IAH
1 stop11h 55m
Frontier
Deal found 5/8![Frontier logo]()
$355
This Southwest deal was found by Cheapflights users on 5/4. 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.
Mon 6/88:35 pm
HOU
- ISP
1 stop10h 30m
Southwest
Fri 6/126:00 am
ISP
- HOU
1 stop7h 15m
Southwest
Deal found 5/4![Southwest logo]()
$327
This Mytrip deal was found by Cheapflights users on 5/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/107:24 pm
IAH
- ISP
1 stop24h 33m
Frontier
Wed 6/249:52 pm
ISP
- IAH
1 stop11h 55m
Frontier
Deal found 5/6![Frontier logo]()
$240
This Southwest deal was found by Cheapflights users on 5/7. 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.
Thu 6/118:40 pm
HOU
- ISP
1 stop12h 50m
Southwest
Mon 6/156:05 pm
ISP
- HOU
1 stop6h 40m
Southwest
Deal found 5/7![Southwest logo]()
$346
This Frontier deal was found by Cheapflights users on 5/8. 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 6/111:07 pm
IAH
- ISP
1 stop6h 50m
Frontier
Mon 6/299:52 pm
ISP
- IAH
1 stop11h 55m
Frontier
Deal found 5/8![Frontier logo]()
$395
This Frontier deal was found by Cheapflights users on 5/5. 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.
Thu 6/181:07 pm
IAH
- ISP
1 stop6h 50m
Frontier
Fri 6/269:52 pm
ISP
- IAH
1 stop11h 55m
Frontier
Deal found 5/5![Frontier logo]()
$270
This Frontier deal was found by Cheapflights users on 5/6. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/251:07 pm
IAH
- ISP
1 stop6h 50m
Frontier
Wed 7/19:52 pm
ISP
- IAH
1 stop11h 55m
Frontier
Deal found 5/6![Frontier logo]()
$264
One-way flights from Houston to IslipSearch for one-way flight options from Houston to Islip. Find affordable one-way fares based on user searches. Data last updated May 9, 2026.
Search for one-way flight options from Houston to Islip. Find affordable one-way fares based on user searches. Data last updated May 9, 2026.
This Expedia deal was found by Cheapflights users on 5/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/297:44 pm
IAH
- ISP
1 stop13h 21m
Frontier
Deal found 5/4![Frontier logo]()
$111
This Expedia deal was found by Cheapflights users on 5/7. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/77:24 pm
IAH
- ISP
1 stop13h 34m
Frontier
Deal found 5/7![Frontier logo]()
$131
This Mytrip deal was found by Cheapflights users on 5/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/47:24 pm
IAH
- ISP
1 stop13h 34m
Frontier
Deal found 5/6![Frontier logo]()
$135
This Frontier deal was found by Cheapflights users on 5/5. 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.
Sat 6/131:07 pm
IAH
- ISP
1 stop6h 50m
Frontier
Deal found 5/5![Frontier logo]()
$145
This Frontier deal was found by Cheapflights users on 5/4. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/181:07 pm
IAH
- ISP
1 stop6h 50m
Frontier
Deal found 5/4![Frontier logo]()
$146
This Southwest deal was found by Cheapflights users on 5/5. 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.
Wed 6/173:55 pm
HOU
- ISP
1 stop5h 40m
Southwest
Deal found 5/5![Southwest logo]()
$150
This Southwest deal was found by Cheapflights users on 5/7. 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.
Tue 7/78:10 pm
HOU
- ISP
1 stop10h 55m
Southwest
Deal found 5/7![Southwest logo]()
$155
This Kiwi.com deal was found by Cheapflights users on 5/5. 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.
Wed 6/179:42 am
IAH
- ISP
2 stops10h 15m
Frontier
Deal found 5/5![Frontier logo]()
$169
This Southwest deal was found by Cheapflights users on 5/6. 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.
Tue 8/46:05 am
HOU
- ISP
1 stop5h 05m
Southwest
Deal found 5/6![Southwest logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 5/4. 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.
Fri 6/1910:36 am
IAH
- ISP
2 stops33h 21m
Frontier
Deal found 5/4![Frontier logo]()
$174
This Southwest deal was found by Cheapflights users on 5/8. 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 5/292:45 pm
HOU
- ISP
2 stops7h 45m
Southwest
Deal found 5/8![Southwest logo]()
$200
This Kiwi.com deal was found by Cheapflights users on 5/4. 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.
Fri 6/199:10 am
HOU
- ISP
3 stops34h 47m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$343
Find flight deals from Houston to Islip
Discover tips and strategies to find the most affordable flight options for your journey from Houston (HO1) to Islip (ISP). 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 May 9, 2026.
Round-trip from | $230 (Expedia) |
|---|---|
One-way from | $111 (Expedia) |
Popular in | December |
Cheapest in | September |
Average price | $274 |
Cheapflights Fare Finder
Customize your flight search to find flights from Houston to Islip 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 May 9, 2026.
Use the filters below to find and compare flights from Houston to Islip that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
HoustonIslip
IAH - ISP
IAHISP
Houston George Bush Intcntl
Sat 7/18
7:24 pm-10:03 am
1 stop13h 39m
Islip Long Island
Wed 7/29
10:48 am-6:25 pm
1 stop8h 37m
$230
HoustonIslip
IAH - ISP
IAHISP
Houston George Bush Intcntl
Thu 6/18
1:07 pm-8:57 pm
1 stop6h 50m
Islip Long Island
Mon 6/22
9:52 pm-8:47 am
1 stop11h 55m
$270
HoustonIslip
HOU - ISP
HOUISP
Houston Hobby
Thu 6/4
8:35 pm-8:20 am
1 stop10h 45m
Islip Long Island
Mon 6/8
5:50 pm-12:05 am
2 stops7h 15m
$314
HoustonIslip
HOU - ISP
HOUISP
Houston Hobby
Mon 6/8
8:35 pm-8:05 am
1 stop10h 30m
Islip Long Island
Fri 6/12
5:50 pm-12:05 am
2 stops7h 15m
$333
HoustonIslip
IAH - ISP
IAHISP
Houston George Bush Intcntl
Fri 6/19
1:07 pm-8:57 pm
1 stop6h 50m
Islip Long Island
Mon 6/22
9:52 pm-8:47 am
1 stop11h 55m
$335
HoustonIslip
HOU - ISP
HOUISP
Houston Hobby
Thu 6/11
8:40 pm-10:30 am
1 stop12h 50m
Islip Long Island
Mon 6/15
6:05 pm-11:45 pm
1 stop6h 40m
$346
HoustonIslip
HOU - ISP
HOUISP
Houston Hobby
Sat 7/18
1:20 pm-11:10 pm
2 stops8h 50m
Islip Long Island
Wed 7/29
8:55 am-4:30 pm
1 stop8h 35m
$349
HoustonIslip
IAH - ISP
IAHISP
Houston George Bush Intcntl
Fri 6/26
1:07 pm-8:57 pm
1 stop6h 50m
Islip Long Island
Sun 6/28
9:52 pm-8:47 am
1 stop11h 55m
$355
Quickest round-trip
HoustonIslip
HOU - ISP
HOUISP
Houston Hobby
Fri 6/5
3:35 pm-11:35 pm
2 stops7h 00m
Islip Long Island
Fri 6/12
3:05 pm-9:55 pm
2 stops7h 50m
$375
HoustonIslip
IAH - ISP
IAHISP
Houston George Bush Intcntl
Thu 6/11
1:07 pm-8:57 pm
1 stop6h 50m
Islip Long Island
Mon 6/29
9:52 pm-8:47 am
1 stop11h 55m
$395
Showing 1-10 of 26 resultsSorted by cheapest first
Best time to book a flight from Houston to Islip
Have a flexible travel schedule? Discover the best time to fly to Islip from Houston with our price prediction graph.
HO1-ISP
IAH-ISP
HOU-ISP
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 Houston to Islip
HO1-ISP
IAH-ISP
HOU-ISP
No data available for this route at this time. Please check back soon.
Reviews of airlines servicing Islip
Get insights into the airlines that provide service to Islip. 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 Islip. Reviews last updated May 9, 2026.
See what other customers who have flown with Southwest from Houston to Islip have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Related info for your journey
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Other flights to Islip
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Houston and Islip flights
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Top airline flying from Houston to Islip
Discover the top airline that operate flights from Houston to Islip. 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 May 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$278 | Average$592 | FlexibilityNo cancel fee | On-time63% |