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Galveston

$161+ Cheap flights from Islip (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 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — HOU
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Islip to Galveston

Keep the following information in mind while searching for Islip to Galveston flight deals. Data was last updated September 15, 2025.

Round-trip from

$267
(Southwest)

One-way from

$161
(Southwest)

Popular in

April

Cheapest in

January

Average price

$406
From Islip Long Island to Galveston
Search Deals
One-way flight from Islip Long Island to Galveston
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($158 potential increase over avg. RT price).
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Cheapest flight prices on average. 10% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Islip to Galveston

Cheapest flights from Islip to Galveston
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 September 15, 2025.

This Southwest deal was found by Cheapflights users on 9/12. 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 10/305:35 pmISP - HOU
1 stop7h 10mSouthwest
Sun 11/25:20 amHOU - ISP
1 stop6h 30mSouthwest
Deal found 9/12$267
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.
Sat 12/275:30 amISP - HOU
2 stops10h 00mSouthwest
Thu 1/16:00 amHOU - ISP
1 stop5h 15mSouthwest
Deal found 9/14$434
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.
Thu 9/256:25 amISP - HOU
1 stop6h 25mSouthwest
Wed 10/86:35 amHOU - ISP
1 stop4h 50mSouthwest
Deal found 9/14$573
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/223:05 pmISP - HOU
1 stop6h 45mSouthwest
Tue 9/236:30 amHOU - ISP
1 stop5h 45mSouthwest
Deal found 9/13$697

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 September 15, 2025.
Use the filters below to find and compare flights from Islip to Galveston that are best for you.

Fly from

Islip

Fly to

Galveston

Route

Depart

Return

Price

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Thu 10/30

5:35 pm-11:45 pm

1 stop7h 10m

Houston Hobby

Sun 11/2

5:20 am-12:50 pm

1 stop6h 30m

$267

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Sat 1/17

12:15 pm-7:10 pm

1 stop7h 55m

Houston Hobby

Sun 2/1

6:00 am-11:55 am

1 stop4h 55m

$291

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Sat 12/27

5:30 am-2:30 pm

2 stops10h 00m

Houston Hobby

Thu 1/1

6:00 am-12:15 pm

1 stop5h 15m

$434

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Thu 9/25

6:25 am-11:50 am

1 stop6h 25m

Houston Hobby

Wed 10/8

6:35 am-12:25 pm

1 stop4h 50m

$573

IslipHouston

ISP - HOU

ISPHOU

Islip Long Island

Sun 11/9

5:50 am-12:25 pm

1 stop7h 35m

$161

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

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.
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

What is the cheapest month to book a flight from Islip to Galveston?

Currently, September is the cheapest month in which you can book a flight from Islip to Galveston (average of $230). Flying from Islip to Galveston in March is currently the most expensive (average of $330). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ISP to G4L?

Find hourly flight availability from Islip to Galveston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

When flying from Islip to Galveston, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 September 15, 2025.
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.
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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.

  • What airport do you fly from for flights from Islip to Galveston?

    For a flight from Islip to Galveston, you will be flying from Long Island. Islip Long Island (ISP) is just 7.2 mi from the center of the city. Long Island is the only Islip airport and it handles 0 outbound flights to Galveston per day. 1 airline has flights to Galveston from Islip Long Island on a regular basis.

  • How long is the flight from Islip to Galveston?

    Departing from Islip to Galveston will take you 7h 10m. Airlines will cover a distance of 1462 mi.

  • Can I find deals for flights from Islip to Galveston that include hotel bookings?

    Yes. In addition to deals on Islip to Galveston flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to Galveston?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Galveston.

  • Can I find deals for business class flights from Islip to Galveston?

    Yes. Cheapflights offers flight deals from Islip to Galveston by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Islip to Galveston?

    Currently, September is the cheapest month in which you can book a flight from Islip to Galveston (average of $230). Flying from Islip to Galveston in March is currently the most expensive (average of $330). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$343Average$476FlexibilityNo cancel feeOn-time63%

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