HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Galveston

$247+ Cheap flights from Islip, NY (ISP) to Galveston, TX

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 9/24. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — HOU
Aug 6 — Aug 131
Wed 8/6
Wed 8/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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

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 Galveston

Keep the following information in mind while searching for Islip to Galveston flight deals. Data was last updated August 1, 2025.

Round-trip from

$247
(Southwest)

Popular in

April

Cheapest in

January

Average price

$376
From Islip Long Island to Galveston
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($135 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

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 August 1, 2025.

This Southwest deal was found by Cheapflights users on 7/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2412:30 pmISP - HOU
1 stop8h 35mSouthwest
Mon 9/295:40 amHOU - ISP
1 stop5h 20mSouthwest
Deal found 7/30$247

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 1, 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

Wed 9/24

12:30 pm-8:05 pm

1 stop8h 35m

Houston Hobby

Mon 9/29

5:40 am-12:00 pm

1 stop5h 20m

$247

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

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, New York to Galveston?

Currently, September is the cheapest month in which you can book a flight from Islip, New York to Galveston (average of $230). Flying from Islip, New York to Galveston in March is currently the most expensive (average of $331). 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 August 1, 2025.

When flying from Islip, New York 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 August 1, 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
4,246 reviews

Overall

8.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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.

  • 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, New York to Galveston?

    Currently, September is the cheapest month in which you can book a flight from Islip, New York to Galveston (average of $230). Flying from Islip, New York to Galveston in March is currently the most expensive (average of $331). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Islip to Galveston

See prices for flight routes from nearby airports that may be better suited for you.
LaGuardia to Dallas/Fort Worth flights
Newark to Dallas/Fort Worth flights
John F Kennedy Intl to Dallas/Fort Worth flights
John F Kennedy Intl to Hobby flights
LaGuardia to Hobby flights
Newark to Hobby flights
John F Kennedy Intl to George Bush Intcntl flights
LaGuardia to George Bush Intcntl flights
Newark to George Bush Intcntl flights
John F Kennedy Intl to Austin flights
Newark to Austin flights
LaGuardia to Austin flights
LaGuardia to Love Field flights
Newark to San Antonio flights
John F Kennedy Intl to San Antonio flights
LaGuardia to San Antonio flights
Buffalo to Dallas/Fort Worth flights
Newark to Love Field flights
Albany to Dallas/Fort Worth flights
John F Kennedy Intl to Love Field flights
Buffalo to Hobby flights
White Plains to Dallas/Fort Worth flights
Syracuse to Dallas/Fort Worth flights
Buffalo to George Bush Intcntl flights
White Plains to Austin flights
Syracuse to El Paso flights
Rochester to Dallas/Fort Worth flights
Albany to Austin flights
Islip to Dallas/Fort Worth flights
Syracuse to Hobby flights
John F Kennedy Intl to El Paso flights
Syracuse to Austin flights
Rochester to Austin flights
Newark to El Paso flights
Stewart to Dallas/Fort Worth flights
Buffalo to Love Field flights
White Plains to Hobby flights
LaGuardia to El Paso flights
Albany to Love Field flights
Syracuse to George Bush Intcntl flights
Albany to Hobby flights
Buffalo to Austin flights
White Plains to Love Field flights
Rochester to Hobby flights
Syracuse to San Antonio flights
Buffalo to San Antonio flights
White Plains to George Bush Intcntl flights
Albany to George Bush Intcntl flights
Newark to McAllen flights
Albany to San Antonio flights

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 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$343Average$476FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.