In terms of precipitation, rainfall in Galveston ranges from 3.2 - 5.9 inches per month. June is typically the wettest month, when rainfall can reach 5.9 in. February is typically the driest time to visit Galveston when rainfall is around 3.2 in.

If weather is an important factor for your trip to Galveston, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 53.6 F).

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

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.

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.

Find Cheap Flights from Islip, NY to Galveston

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Find flight deals from Islip to Galveston

Popular in	December
Cheapest in	January
Average price	$359

High demand for flights, 2% potential price rise

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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).

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Average for round-trip flights in October 2026

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Reviews of airlines servicing Galveston

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

7.9

Good

4,226 reviews

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

7.9

Good

4,226 reviews

Southwest

7.9

Good

4,226 reviews

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

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.

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Top airline flying from Islip to Galveston

Airline	Cheapest	Average	Flexibility	On-time
Southwest	Cheapest$266	Average$474	FlexibilityNo cancel fee	On-time63%

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Find cheap flights from Islip to Galveston with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Islip to Galveston

Popular in

Cheapest in

Average price

Reviews of airlines servicing Galveston

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.

Related info for your journey

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

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

How can I find direct flights from Islip to Galveston?

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

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.

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 October 11, 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 October 11, 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

100% Free

Book with Flexibility

Travel Smart

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

Find cheap flights from Islip to Galveston with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Islip to Galveston

Popular in

Cheapest in

Average price

Reviews of airlines servicing Galveston

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.

Related info for your journey

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

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

How can I find direct flights from Islip to Galveston?

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

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.

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 October 11, 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 October 11, 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

100% Free

Book with Flexibility

Travel Smart