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$119+ Cheap flights from Greenville to Islip, NY (GSP - 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — ISP
jul. 8 — jul. 151
mar. 7/8
mar. 7/15
1 adult, Economy
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Cheap flight deals from Greenville to Islip

Discover tips and strategies to find the most affordable flight options for your journey from Greenville (GSP) 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 julio 3, 2025.

Round-trip from

$254
(Southwest)

One-way from

$119
(Southwest)

Popular in

May

Cheapest in

April

Average price

$474
From Greenville to Islip Long Island
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One-way flight from Greenville to Islip Long Island
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Highest demand for flights based on searches. 9% potential increase in price ($43 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Greenville to Islip

Cheapest flights from Greenville to Islip
Explore the most affordable flight options available from Greenville to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 3, 2025.

This Southwest deal was found by Cheapflights users on 7/3. 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.
sáb. 9/135:05 pmGSP - ISP
1 stop4h 35mSouthwest
mié. 9/176:05 amISP - GSP
1 stop3h 45mSouthwest
Deal found 7/3$254
This FlightHub deal was found by Cheapflights users on 7/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 7/204:33 pmGSP - ISP
2 stops17h 31mBreeze Airways
sáb. 7/267:25 pmISP - GSP
1 stop14h 29mBreeze Airways
Deal found 7/1$605

Cheapflights Fare Finder

Customize your flight search to find flights from Greenville 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 julio 3, 2025.
Use the filters below to find and compare flights from Greenville to Islip that are best for you.

Fly from

Greenville

Fly to

Islip

Route

Depart

Return

Price

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

sáb. 9/13

5:05 pm-9:40 pm

1 stop4h 35m

Islip Long Island

mié. 9/17

6:05 am-9:50 am

1 stop3h 45m

$254

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

dom. 7/20

4:33 pm-10:04 am

2 stops17h 31m

Islip Long Island

sáb. 7/26

7:25 pm-9:54 am

1 stop14h 29m

$605

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

vie. 7/18

4:05 pm-1:32 pm

3 stops21h 27m

Islip Long Island

mar. 7/22

7:30 am-8:52 pm

3 stops37h 22m

$817

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

lun. 8/4

5:45 am-9:25 am

1 stop3h 40m

$119

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

dom. 8/3

4:33 pm-10:04 am

2 stops17h 31m

$365

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

mié. 7/16

9:42 pm-9:56 am

3 stops36h 14m

$405

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Best time to book a flight from Greenville to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Greenville 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 Greenville to Islip

What is the cheapest month to book a flight from Greenville to Islip, New York?

Currently, January is the cheapest month in which you can book a flight from Greenville to Islip, New York (average of $108). Flying from Greenville to Islip, New York in November is currently the most expensive (average of $213). 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 GSP to ISP?

Find hourly flight availability from Greenville to Islip. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 3, 2025.

One of the essential ways to save on airfare from Greenville to Islip, New York is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 28% on airfare.

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 julio 3, 2025.
Peruse reviews from past customers who have flown with Breeze Airways and Southwest from Greenville to Islip to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Breeze Airways
8.1
Very good
183 reviews

Boarding

8.3

Entertainment

6.6

Crew

8.8

Food

6.8

Overall

8.1

Comfort

8.2

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!
Breeze Airways
8.1
Very good
183 reviews
Breeze Airways
8.1
Very good
183 reviews

Boarding

8.3

Entertainment

6.6

Crew

8.8

Food

6.8

Overall

8.1

Comfort

8.2

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!
Southwest
8.0
Very good
4,266 reviews
Breeze Airways
8.1
Very good
183 reviews

Boarding

8.3

Entertainment

6.6

Crew

8.8

Food

6.8

Overall

8.1

Comfort

8.2

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

Related info for your journey

Find useful and relevant information for your journey from Greenville to Islip. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Greenville to Islip, New York round-trip?

    Southwest, at $254, was found to be the cheapest airline from Greenville to Islip, New York. An alternate airline flying to your destination would be Breeze Airways. Southwest is priced at 37% lower than the current average price of a flight leaving 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Greenville to Islip 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 Greenville to Islip, New York?

    Currently, January is the cheapest month in which you can book a flight from Greenville to Islip, New York (average of $108). Flying from Greenville to Islip, New York in November is currently the most expensive (average of $213). 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

Traveling to a place near Greenville?

Book flights to Greenville if you plan to visit one of these locations
Southampton
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Top airline flying from Greenville to Islip

Discover the top airline that operate flights from Greenville 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 julio 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$286Average$347FlexibilityNo cancel feeOn-time63%

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