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Islip

$184+ 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 3/25. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — ISP
Mar 28 — Apr 41
Sat 3/28
Sat 4/4
1 adult, Economy
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Cheap 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 February 26, 2026.

This Southwest deal was found by Cheapflights users on 2/25. 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 4/248:10 am
GSP
-
ISP
1 stop3h 40m
Southwest
Mon 4/274:30 pm
ISP
-
GSP
1 stop4h 25m
Southwest
Deal found 2/25$328
This Southwest deal was found by Cheapflights users on 2/24. 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.
Wed 3/181:50 pm
GSP
-
ISP
1 stop9h 00m
Southwest
Mon 3/235:55 pm
ISP
-
GSP
1 stop3h 55m
Southwest
Deal found 2/24$350
This Southwest deal was found by Cheapflights users on 2/22. 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 6/51:55 pm
GSP
-
ISP
1 stop3h 20m
Southwest
Mon 6/83:05 pm
ISP
-
GSP
1 stop6h 30m
Southwest
Deal found 2/22$362
This Southwest deal was found by Cheapflights users on 2/22. 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.
Wed 3/258:00 am
GSP
-
ISP
1 stop3h 40m
Southwest
Tue 3/314:40 pm
ISP
-
GSP
1 stop3h 50m
Southwest
Deal found 2/22$367
This Southwest deal was found by Cheapflights users on 2/22. 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 5/158:10 am
GSP
-
ISP
1 stop3h 40m
Southwest
Sun 5/175:15 am
ISP
-
GSP
2 stops7h 55m
Southwest
Deal found 2/22$372
This Southwest deal was found by Cheapflights users on 2/22. 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 3/191:55 pm
GSP
-
ISP
1 stop3h 25m
Southwest
Sat 3/215:50 pm
ISP
-
GSP
1 stop3h 55m
Southwest
Deal found 2/22$387

Find 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 February 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$328
(Southwest)

One-way from

$184
(Southwest)

Popular in

February

Cheapest in

March

Average price

$756
Provider with most accurate pricing for Greenville-Islip Long Island flight deals.
Search Deals
Provider most trusted by Cheapflights users for Greenville-Islip Long Island flights.
Search Deals
From Greenville to Islip Long Island
Search Deals
One-way flight from Greenville to Islip Long Island
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($110 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease ($39 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 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 February 26, 2026.
Use the filters below to find and compare flights from Greenville to Islip that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

Fri 4/24

8:10 am-11:50 am

1 stop3h 40m

Islip Long Island

Mon 4/27

4:30 pm-8:55 pm

1 stop4h 25m

$328

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

Wed 3/18

1:50 pm-10:50 pm

1 stop9h 00m

Islip Long Island

Mon 3/23

5:55 pm-9:50 pm

1 stop3h 55m

$350

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

Wed 3/25

8:00 am-11:40 am

1 stop3h 40m

Islip Long Island

Tue 3/31

4:40 pm-8:30 pm

1 stop3h 50m

$367

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

Fri 5/15

8:10 am-11:50 am

1 stop3h 40m

Islip Long Island

Sun 5/17

5:15 am-1:10 pm

2 stops7h 55m

$372

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

Thu 3/19

1:55 pm-5:20 pm

1 stop3h 25m

Islip Long Island

Sat 3/21

5:50 pm-9:45 pm

1 stop3h 55m

$387

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

Wed 3/25

8:00 am-11:40 am

1 stop3h 40m

$184

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

Mon 3/16

1:55 pm-5:20 pm

1 stop3h 25m

$194

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

Tue 3/17

8:00 am-11:40 am

1 stop3h 40m

$194

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

Sun 3/15

8:00 am-11:45 am

1 stop3h 45m

$264

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

Sun 3/15

6:09 pm-1:31 pm

2 stops19h 22m

$309

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/23

Sorted by cheapest first

Compare providers for flights from Greenville to Islip

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 Greenville to Islip 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 Greenville-Islip, New York flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Greenville-Islip, New York flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Greenville-Islip, New York flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Greenville-Islip, New York 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 Greenville-Islip, New York 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 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, July is the cheapest month in which you can book a flight from Greenville to Islip, New York (average of $41). Flying from Greenville to Islip, New York in December is currently the most expensive (average of $78). 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 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 February 26, 2026.
Peruse reviews from past customers who have flown with 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.
Southwest
8.0
Very good
4,299 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Overall

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
4,299 reviews
Southwest
8.0
Very good
4,299 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Overall

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 Greenville to Islip. 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 Greenville to Islip, New York?

    Southwest can get you from Greenville to Islip, New York in just under 3h 40m. Your travel time can differ by up to . Airlines will cover a distance of 642 mi.

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

    Southwest, at $286, was found to be the cheapest airline from Greenville to Islip, New York.. Southwest is priced at 30% 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, July is the cheapest month in which you can book a flight from Greenville to Islip, New York (average of $41). Flying from Greenville to Islip, New York in December is currently the most expensive (average of $78). 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
Riverhead

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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 February 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$286Average$362FlexibilityNo cancel feeOn-time63%

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