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$159+ Cheap flights from Islip, NY to Greenville (ISP - GSP)

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 7/16. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — GSP
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Islip to Greenville

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Greenville (GSP). 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 June 12, 2025.

Round-trip from

$367
(Southwest)

One-way from

$159
(Southwest)

Popular in

October

Cheapest in

April

Average price

$272
From Islip Long Island to Greenville
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One-way flight from Islip Long Island to Greenville
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Highest demand for flights based on searches. 14% potential increase in price ($61 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Islip to Greenville

Cheapest flights from Islip to Greenville
Explore the most affordable flight options available from Islip to Greenville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Southwest deal was found by Cheapflights users on 6/10. 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 7/106:00 amISP - GSP
1 stop3h 55mSouthwest
Thu 7/175:40 pmGSP - ISP
1 stop6h 25mSouthwest
Deal found 6/10$367
This FlightHub deal was found by Cheapflights users on 6/10. 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.
Sat 8/307:25 pmISP - GSP
1 stop14h 29mBreeze Airways
Sun 8/314:33 pmGSP - ISP
2 stops17h 31mBreeze Airways
Deal found 6/10$587
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/107:39 pmISP - GSP
2 stops19h 20mMultiple Airlines
Thu 7/1710:34 amGSP - ISP
3 stops23h 30mMultiple Airlines
Deal found 6/10$803

Cheapflights Fare Finder

Customize your flight search to find flights from Islip to Greenville 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 June 12, 2025.
Use the filters below to find and compare flights from Islip to Greenville that are best for you.

Fly from

Islip

Fly to

Greenville

Route

Depart

Return

Price

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Thu 7/10

6:00 am-9:55 am

1 stop3h 55m

Greenville

Thu 7/17

5:40 pm-12:05 am

1 stop6h 25m

$367

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Sat 8/30

7:25 pm-9:54 am

1 stop14h 29m

Greenville

Sun 8/31

4:33 pm-10:04 am

2 stops17h 31m

$587

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Thu 7/10

7:39 pm-2:59 pm

2 stops19h 20m

Greenville

Thu 7/17

10:34 am-10:04 am

3 stops23h 30m

$803

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Wed 7/16

4:40 pm-8:30 pm

1 stop3h 50m

$159

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Wed 9/24

7:32 pm-9:53 am

1 stop14h 21m

$314

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Thu 11/6

4:33 pm-8:49 pm

3 stops28h 16m

$658

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Best time to book a flight from Islip to Greenville

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

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

Currently, January is the cheapest month in which you can book a flight from Islip, New York to Greenville (average of $329). Flying from Islip, New York to Greenville in March is currently the most expensive (average of $386). 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.

Rainfall in Greenville by month

Plan your trip to Greenville by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Greenville ranges from 3.6 - 5.1 inches per month. March is typically the wettest month, when rainfall can reach 5.1 in. November is typically the driest time to visit Greenville when rainfall is around 3.6 in.

Temperature in Greenville by month

Plan your trip to Greenville by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Greenville, 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 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Greenville

Get insights into the airlines that provide service to Greenville. 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 Greenville. Reviews last updated June 12, 2025.
Read through reviews of airlines operating flights from Islip to Greenville, such as Breeze Airways and Southwest. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Breeze Airways
8.1
Very good
178 reviews

Boarding

8.3

Food

6.7

Crew

8.8

Comfort

8.2

Overall

8.1

Entertainment

6.6

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
178 reviews
Breeze Airways
8.1
Very good
178 reviews

Boarding

8.3

Food

6.7

Crew

8.8

Comfort

8.2

Overall

8.1

Entertainment

6.6

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
4,287 reviews
Breeze Airways
8.1
Very good
178 reviews

Boarding

8.3

Food

6.7

Crew

8.8

Comfort

8.2

Overall

8.1

Entertainment

6.6

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 Islip to Greenville. 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 Islip, New York to Greenville round-trip?

    Flying on Southwest is currently your cheapest option to Greenville, with prices starting at $367. Another option worth looking into is Breeze Airways, starting at $587 round trip.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Islip to Greenville 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 Greenville?

    Currently, January is the cheapest month in which you can book a flight from Islip, New York to Greenville (average of $329). Flying from Islip, New York to Greenville in March is currently the most expensive (average of $386). 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 Islip?

Book flights to Islip if you plan to visit one of these locations
Simpsonville
Duncan
Seneca
Anderson

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Top airline flying from Islip to Greenville

Discover the top airline that operate flights from Islip to Greenville. 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$218Average$386FlexibilityNo cancel feeOn-time63%

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