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$152+ 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 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — GSP
Mar 11 — Mar 181
Wed 3/11
Wed 3/18
1 adult, Economy
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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 February 9, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/9. 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.
Sun 3/15:51 pm
ISP
-
GSP
1 stop25h 47m
Multiple Airlines
Mon 3/98:18 pm
GSP
-
ISP
2 stops38h 52m
Multiple Airlines
Deal found 2/9$279
This Southwest deal was found by Cheapflights users on 2/8. 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 3/104:40 pm
ISP
-
GSP
1 stop3h 50m
Southwest
Tue 3/178:00 am
GSP
-
ISP
1 stop3h 40m
Southwest
Deal found 2/8$303
This Southwest deal was found by Cheapflights users on 2/9. 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 4/234:30 pm
ISP
-
GSP
1 stop4h 25m
Southwest
Fri 4/248:10 am
GSP
-
ISP
1 stop3h 40m
Southwest
Deal found 2/9$346
This Kiwi.com deal was found by Cheapflights users on 2/8. 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.
Sun 3/1510:31 am
ISP
-
GSP
1 stop6h 53m
Multiple Airlines
Fri 3/208:18 pm
GSP
-
ISP
2 stops14h 52m
Multiple Airlines
Deal found 2/8$372
This Southwest deal was found by Cheapflights users on 2/6. 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 3/165:55 pm
ISP
-
GSP
1 stop3h 55m
Southwest
Fri 3/201:55 pm
GSP
-
ISP
1 stop3h 25m
Southwest
Deal found 2/6$377
This Southwest deal was found by Cheapflights users on 2/8. 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.
Sun 3/1511:45 am
ISP
-
GSP
1 stop10h 00m
Southwest
Fri 3/201:55 pm
GSP
-
ISP
1 stop3h 25m
Southwest
Deal found 2/8$382

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 February 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$279
(Kiwi.com)

One-way from

$152
(Southwest)

Popular in

December

Cheapest in

April

Average price

$377
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. 23% potential increase in price ($121 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 9, 2026.
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

Tue 3/10

4:40 pm-8:30 pm

1 stop3h 50m

Greenville

Tue 3/17

8:00 am-11:40 am

1 stop3h 40m

$303

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Thu 4/23

4:30 pm-8:55 pm

1 stop4h 25m

Greenville

Fri 4/24

6:25 am-4:30 pm

2 stops10h 05m

$351

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Mon 3/16

5:55 pm-9:50 pm

1 stop3h 55m

Greenville

Fri 3/20

1:55 pm-5:20 pm

1 stop3h 25m

$377

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Sun 3/15

11:45 am-9:45 pm

1 stop10h 00m

Greenville

Fri 3/20

1:55 pm-5:20 pm

1 stop3h 25m

$382

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Sun 3/1

5:35 am-10:10 am

1 stop4h 35m

Greenville

Mon 3/9

1:55 pm-5:20 pm

1 stop3h 25m

$417

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Fri 3/6

5:55 pm-9:50 pm

1 stop3h 55m

Greenville

Sun 3/8

8:00 am-11:45 am

1 stop3h 45m

$427

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Tue 2/24

3:45 pm-7:50 pm

1 stop4h 05m

Greenville

Sat 2/28

8:00 am-12:05 pm

1 stop4h 05m

$447

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Sat 2/21

4:45 pm-8:50 pm

1 stop4h 05m

Greenville

Wed 2/25

10:05 am-4:15 pm

1 stop6h 10m

$447

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Wed 4/22

4:10 pm-8:00 pm

1 stop3h 50m

$152

IslipGreenville

ISP - GSP

ISPGSP

Islip Long Island

Tue 3/31

5:45 am-1:15 pm

1 stop7h 30m

$157

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/9

Showing 1-10 of 17 results
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 February.
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, March is the cheapest month in which you can book a flight from Islip, New York to Greenville (average of $36). Flying from Islip, New York to Greenville in December is currently the most expensive (average of $93). 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 February 9, 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
4,282 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,282 reviews
Southwest
8.0
Very good
4,282 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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 3h 50m. 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 $218. Southwest is currently priced 45% 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, March is the cheapest month in which you can book a flight from Islip, New York to Greenville (average of $36). Flying from Islip, New York to Greenville in December is currently the most expensive (average of $93). 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
Simpsonville
Duncan
Greer
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 February 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$218Average$386FlexibilityNo cancel feeOn-time63%

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