$148+ Cheap flights from Islip, NY (ISP) to Galveston, TX
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 9/24. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — HOU
Sep 7 — Sep 141
Round-trip
1 adult, Economy
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Find cheap flights from Islip to Galveston 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 Galveston
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Cheapest flights from Islip to GalvestonExplore the most affordable flight options available from Islip to Galveston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 8, 2026.
Explore the most affordable flight options available from Islip to Galveston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 8, 2026.
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 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 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 9/55:30 am -
1 stop7h 25m
Tue 9/811:20 am -
1 stop8h 50m
Deal found 8/7![Southwest logo]()
$342
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 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.
Tue 9/110:55 am -
1 stop6h 15m
Mon 9/76:10 am -
1 stop5h 25m
Deal found 8/4![Southwest logo]()
$371
Best flights from Islip to GalvestonDiscover carefully curated flight deals from Islip to Galveston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 8, 2026.
Discover carefully curated flight deals from Islip to Galveston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 8, 2026.
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 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 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 9/55:30 am -
1 stop7h 25m
Tue 9/811:20 am -
1 stop8h 50m
Deal found 8/7![Southwest logo]()
$342
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 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.
Tue 9/112:55 pm -
2 stops7h 35m
Mon 9/76:00 am -
2 stops9h 25m
Deal found 8/4![Southwest logo]()
$400
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.
Mon 8/1710:20 am -
1 stop8h 25m
Wed 8/196:25 am -
1 stop7h 30m
Deal found 8/4![Southwest logo]()
$673
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.
Mon 8/1010:20 am -
1 stop8h 25m
Fri 8/145:05 am -
1 stop5h 50m
Deal found 8/5![Southwest logo]()
$930
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.
Mon 8/1012:35 pm -
1 stop6h 10m
Mon 8/173:55 pm -
1 stop5h 10m
Deal found 8/5![Southwest logo]()
$930
Last-minute flights from Islip to GalvestonDiscover last-minute flight deals from Islip to Galveston. Data last updated August 8, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to Galveston. Data last updated August 8, 2026 and is based on user searches.
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 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.
Tue 9/110:55 am -
1 stop6h 15m
Mon 9/76:10 am -
1 stop5h 25m
Deal found 8/4![Southwest logo]()
$371
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 9/55:30 am -
1 stop7h 25m
Tue 9/811:20 am -
1 stop8h 50m
Deal found 8/7![Southwest logo]()
$342
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 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
One-way flights from Islip to GalvestonSearch for one-way flight options from Islip to Galveston. Find affordable one-way fares based on user searches. Data last updated August 8, 2026.
Search for one-way flight options from Islip to Galveston. Find affordable one-way fares based on user searches. Data last updated August 8, 2026.
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 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 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.
Fri 8/216:10 am -
1 stop7h 05m
Deal found 8/6![Southwest logo]()
$243
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 9/258:39 pm -
3 stops38h 59m
Deal found 8/5![Multiple Airlines logo]()
$283
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.
Thu 9/246:48 pm -
3 stops21h 03m
Deal found 8/6![Multiple Airlines logo]()
$366
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.
Tue 8/1810:30 am -
1 stop7h 25m
Deal found 8/7![Southwest logo]()
$409
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.
Fri 8/218:31 pm -
3 stops38h 27m
Deal found 8/6![Multiple Airlines logo]()
$412
Find flight deals from Islip to Galveston
Keep the following information in mind while searching for Islip to Galveston flight deals. Data was last updated August 8, 2026.
Most accurate provider | Expedia 1 star |
|---|---|
Most trusted provider | Expedia 3 stars |
Round-trip from | $285 (Southwest) |
One-way from | $148 (Southwest) |
Popular in | March |
Cheapest in | January |
Average price | $319 |
Cheapflights Fare Finder
Customize your flight search to find flights from Islip to Galveston 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 8, 2026.
Use the filters below to find and compare flights from Islip to Galveston that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest 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 8/27
6:10 am-12:15 pm
1 stop7h 05m
Houston Hobby
Wed 9/2
8:00 am-4:55 pm
1 stop7h 55m
$295
IslipHouston
ISP Islip Long Island - HOU Houston Hobby
ISPHOU
Islip Long Island
Sat 9/5
5:30 am-11:55 am
1 stop7h 25m
Houston Hobby
Tue 9/8
11:20 am-9:10 pm
1 stop8h 50m
$342
IslipHouston
ISP Islip Long Island - HOU Houston Hobby
ISPHOU
Islip Long Island
Sun 9/6
12:20 pm-5:20 pm
1 stop6h 00m
Houston Hobby
Tue 9/8
12:30 pm-9:10 pm
2 stops7h 40m
$352
IslipHouston
ISP Islip Long Island - HOU Houston Hobby
ISPHOU
Islip Long Island
Tue 9/1
12:55 pm-7:30 pm
2 stops7h 35m
Houston Hobby
Mon 9/7
6:00 am-4:25 pm
2 stops9h 25m
$400
IslipHouston
ISP Islip Long Island - HOU Houston Hobby
ISPHOU
Islip Long Island
Mon 8/17
10:20 am-5:45 pm
1 stop8h 25m
Houston Hobby
Wed 8/19
6:25 am-2:55 pm
1 stop7h 30m
$673
IslipHouston
ISP Islip Long Island - HOU Houston Hobby
ISPHOU
Islip Long Island
Mon 8/10
10:20 am-5:45 pm
1 stop8h 25m
Houston Hobby
Fri 8/14
5:05 am-11:55 am
1 stop5h 50m
$930
Quickest round-trip
IslipHouston
ISP Islip Long Island - HOU Houston Hobby
ISPHOU
Islip Long Island
Mon 8/10
12:35 pm-5:45 pm
1 stop6h 10m
Houston Hobby
Mon 8/17
3:55 pm-10:05 pm
1 stop5h 10m
$930
Cheapest one-way
IslipHouston
ISP Islip Long Island - HOU Houston Hobby
ISPHOU
Islip Long Island
Thu 9/24
6:10 am-12:15 pm
1 stop7h 05m
$148
IslipHouston
ISP Islip Long Island - HOU Houston Hobby
ISPHOU
Islip Long Island
Thu 10/15
3:10 pm-12:10 am
1 stop10h 00m
$153
Showing 1-10 of 15 resultsSorted by cheapest first
Best time to book a flight from Islip to Galveston
Have a flexible travel schedule? Discover the best time to fly to Galveston from Islip with our price prediction graph.
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 Galveston
ISP-G4L
ISP-HOU
No data available for this route at this time. Please check back soon.
Reviews of airlines servicing Galveston
Get insights into the airlines that provide service to Galveston. 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 Galveston. Reviews last updated August 8, 2026.
See what other customers who have flown with Southwest from Islip to Galveston have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Related info for your journey
Find useful and relevant information for your journey from Islip to Galveston. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Islip to Galveston
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Complete your trip
Complete your trip to Galveston by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Islip to Galveston by cabin class
Find flights from Islip to Galveston, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Islip and Galveston flights
Browse other Islip and Galveston flight options. Last updated on August 8, 2026.
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 August 8, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Islip to Galveston flights
Consider these flights traveling from Islip to Galveston.
Top airline flying from Islip to Galveston
Discover the top airline that operate flights from Islip to Galveston. 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 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$266 | Average$474 | FlexibilityNo cancel fee | On-time63% |