HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Greenville

$209+ 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 9/27. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — GSP
Aug 29 — Sep 51
Sat 8/29
Sat 9/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Islip to Greenville 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 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 July 30, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/219:39 am
ISP
-
GSP
2 stops31h 35m
Multiple Airlines
Mon 9/288:32 pm
GSP
-
ISP
1 stop20h 26m
Multiple Airlines
Deal found 7/28$307
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.
Thu 8/2010:20 am
ISP
-
GSP
1 stop5h 45m
Southwest
Mon 8/244:40 pm
GSP
-
ISP
1 stop5h 25m
Southwest
Deal found 7/30$309
This Southwest deal was found by Cheapflights users on 7/29. 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.
Fri 8/214:05 pm
ISP
-
GSP
1 stop4h 10m
Southwest
Mon 8/244:40 pm
GSP
-
ISP
1 stop5h 25m
Southwest
Deal found 7/29$343
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/59:39 am
ISP
-
GSP
2 stops31h 35m
Multiple Airlines
Mon 10/128:32 pm
GSP
-
ISP
1 stop18h 31m
Multiple Airlines
Deal found 7/27$347
This Southwest deal was found by Cheapflights users on 7/29. 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 11/125:35 am
ISP
-
GSP
1 stop4h 35m
Southwest
Sun 11/158:15 am
GSP
-
ISP
1 stop3h 30m
Southwest
Deal found 7/29$353
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:46 pm
ISP
-
GSP
1 stop19h 20m
Multiple Airlines
Fri 8/218:45 pm
GSP
-
ISP
1 stop21h 29m
Multiple Airlines
Deal found 7/27$366
This Southwest deal was found by Cheapflights users on 7/27. 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 8/2012:35 pm
ISP
-
GSP
1 stop3h 30m
Southwest
Sun 8/238:40 am
GSP
-
ISP
1 stop7h 15m
Southwest
Deal found 7/27$368
This Southwest deal was found by Cheapflights users on 7/26. 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.
Tue 8/1810:30 am
ISP
-
GSP
2 stops8h 55m
Southwest
Fri 8/214:40 pm
GSP
-
ISP
1 stop5h 25m
Southwest
Deal found 7/26$371
This Southwest deal was found by Cheapflights users on 7/27. 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 10/55:40 pm
ISP
-
GSP
1 stop3h 50m
Southwest
Mon 10/128:25 am
GSP
-
ISP
1 stop6h 05m
Southwest
Deal found 7/27$373

Find 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 July 30, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$307
(Kiwi.com)

One-way from

$209
(Southwest)

Popular in

May

Cheapest in

August

Average price

$495
Provider with most accurate pricing for Islip Long Island-Greenville flight deals.
Search Deals
Provider most trusted by Cheapflights users for Islip Long Island-Greenville flights.
Search Deals
From Islip Long Island to Greenville
Search Deals
One-way flight from Islip Long Island to Greenville
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($75 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

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 July 30, 2026.
Use the filters below to find and compare flights from Islip to Greenville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Thu 8/20

10:20 am-4:05 pm

1 stop5h 45m

Greenville

Mon 8/24

4:40 pm-10:05 pm

1 stop5h 25m

$309

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Fri 8/21

10:20 am-4:05 pm

1 stop5h 45m

Greenville

Mon 8/24

4:40 pm-10:05 pm

1 stop5h 25m

$343
Quickest round-trip

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Tue 8/18

3:20 pm-7:25 pm

1 stop4h 05m

Greenville

Fri 8/21

4:40 pm-10:05 pm

1 stop5h 25m

$366

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Mon 10/5

5:40 pm-9:30 pm

1 stop3h 50m

Greenville

Mon 10/12

8:25 am-2:30 pm

1 stop6h 05m

$373

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Fri 9/4

4:05 pm-8:15 pm

1 stop4h 10m

Greenville

Mon 9/7

8:40 am-9:35 pm

2 stops12h 55m

$428
Cheapest one-way
Quickest one-way

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Sun 9/27

6:20 am-10:10 am

1 stop3h 50m

$209

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Thu 8/13

5:50 pm-7:33 pm

2 stops25h 43m

$395

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Sun 9/20

5:28 pm-6:23 pm

2 stops24h 55m

$395

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Sun 10/18

5:28 pm-6:23 pm

2 stops24h 55m

$395

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Wed 10/14

12:00 pm-7:59 pm

2 stops31h 59m

$415

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

Compare providers for flights from Islip to Greenville

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to Greenville in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Islip, New York-Greenville flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-Greenville flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-Greenville flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Islip, New York-Greenville flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip, New York-Greenville flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, August is the cheapest month in which you can book a flight from Islip, New York to Greenville (average of $301). Flying from Islip, New York to Greenville in May is currently the most expensive (average of $796). 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.

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 July 30, 2026.
See what other customers who have flown with Southwest from Islip to Greenville 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
4,227 reviews

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.
Southwest
8.0
Very good
4,227 reviews
Southwest
8.0
Very good
4,227 reviews

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.

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.

  • How long is the flight from Islip, New York to Greenville?

    Airlines like Southwest fly from Islip, New York to Greenville in about 5h 45m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 642 mi.

  • What is the cheapest airline to fly from Islip, New York to Greenville round-trip?

    Flying on Southwest is currently your cheapest option to Greenville, with prices starting at $302. Southwest is currently priced 42% below the average price you’ll pay for this route.

  • 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, August is the cheapest month in which you can book a flight from Islip, New York to Greenville (average of $301). Flying from Islip, New York to Greenville in May is currently the most expensive (average of $796). 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
Greer
Simpsonville
Greenwood
Duncan
Seneca

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 Greenville

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Charlotte flights
Newark to Charleston flights
LaGuardia to Charlotte flights
John F Kennedy Intl to Charlotte flights
Newark to Myrtle Beach flights
John F Kennedy Intl to Charleston flights
John F Kennedy Intl to Myrtle Beach flights
Newark to Savannah flights
LaGuardia to Charleston flights
LaGuardia to Myrtle Beach flights
John F Kennedy Intl to Savannah flights
Stewart to Myrtle Beach flights
LaGuardia to Savannah flights
Newark to Greenville flights
White Plains to Charleston flights
LaGuardia to Greenville flights
Newark to Columbia flights
John F Kennedy Intl to Greenville flights
Stewart to Charleston flights
White Plains to Myrtle Beach flights
LaGuardia to Columbia flights
Newark to Hilton Head Island flights
Buffalo to Charlotte flights
John F Kennedy Intl to Columbia flights
Islip to Myrtle Beach flights
LaGuardia to Hilton Head Island flights
Syracuse to Charlotte flights
Islip to Charleston flights
Albany to Charlotte flights
White Plains to Charlotte flights
Rochester to Charlotte flights
Islip to Charlotte flights
White Plains to Savannah flights
Stewart to Charlotte flights
Buffalo to Myrtle Beach flights
Newark to Augusta flights
Buffalo to Charleston flights
John F Kennedy Intl to Augusta flights
Buffalo to Savannah flights
Stewart to Savannah flights
Stewart to Greenville flights
Albany to Savannah flights
Albany to Myrtle Beach flights
Albany to Charleston flights
Rochester to Myrtle Beach flights
Syracuse to Myrtle Beach flights
Rochester to Greenville flights
Syracuse to Greenville flights
Syracuse to Savannah flights

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 July 30, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$302Average$506FlexibilityNo 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.