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Islip

$167+ 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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — ISP
apr. 28 — maj 51
tir. 4/28
tir. 5/5
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 marts 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tor. 4/3010:18 am
GSP
-
ISP
1 stop22h 55m
Multiple Airlines
søn. 5/34:07 pm
ISP
-
GSP
1 stop27h 31m
Multiple Airlines
Deal found 3/26$239
This Southwest deal was found by Cheapflights users on 3/24. 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.
lør. 5/28:00 am
GSP
-
ISP
1 stop3h 35m
Southwest
lør. 5/166:00 am
ISP
-
GSP
1 stop4h 10m
Southwest
Deal found 3/24$303
This Southwest deal was found by Cheapflights users on 3/26. 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.
lør. 5/3012:25 pm
GSP
-
ISP
2 stops10h 15m
Southwest
lør. 6/66:00 am
ISP
-
GSP
2 stops6h 15m
Southwest
Deal found 3/26$313
This Southwest deal was found by Cheapflights users on 3/26. 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.
fre. 5/86:25 am
GSP
-
ISP
2 stops10h 05m
Southwest
man. 5/114:30 pm
ISP
-
GSP
1 stop4h 25m
Southwest
Deal found 3/26$333
This Southwest deal was found by Cheapflights users on 3/29. 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.
tir. 4/281:55 pm
GSP
-
ISP
1 stop4h 35m
Southwest
tir. 5/54:10 pm
ISP
-
GSP
1 stop3h 50m
Southwest
Deal found 3/29$339

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 marts 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$239
(Kiwi.com)

One-way from

$167
(Kiwi.com)

Popular in

February

Cheapest in

April

Average price

$569
Provider with most accurate pricing for Greenville-Islip Long Island flight deals.
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Provider most trusted by Cheapflights users for Greenville-Islip Long Island flights.
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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. 34% potential increase in price ($226 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in March 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 marts 29, 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

Cheapest round-trip

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

tor. 4/30

10:18 am-9:13 am

1 stop22h 55m

Islip Long Island

søn. 5/3

4:07 pm-7:38 pm

1 stop27h 31m

$256
Quickest round-trip

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

lør. 5/2

8:00 am-11:35 am

1 stop3h 35m

Islip Long Island

lør. 5/16

6:00 am-10:10 am

1 stop4h 10m

$303

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

lør. 5/30

8:00 am-11:35 am

1 stop3h 35m

Islip Long Island

lør. 6/6

2:45 pm-9:15 pm

1 stop6h 30m

$303

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

fre. 5/8

6:25 am-4:30 pm

2 stops10h 05m

Islip Long Island

man. 5/11

8:35 am-5:50 pm

2 stops9h 15m

$339

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

tir. 4/28

1:55 pm-6:30 pm

1 stop4h 35m

Islip Long Island

tir. 5/5

4:10 pm-8:00 pm

1 stop3h 50m

$339

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

fre. 4/17

1:50 pm-8:25 pm

1 stop6h 35m

Islip Long Island

man. 4/20

4:30 pm-8:55 pm

1 stop4h 25m

$345
Cheapest one-way

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

lør. 5/9

5:25 pm-11:20 pm

2 stops5h 55m

$175
Quickest one-way

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

fre. 9/4

8:40 am-12:35 pm

1 stop3h 55m

$234

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

fre. 9/4

3:46 pm-1:33 pm

3 stops21h 47m

$270

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

søn. 4/26

2:12 pm-8:05 pm

2 stops29h 53m

$615

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/28

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 March.
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.

How much does it cost to fly round-trip from Greenville to Islip, New York?

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 marts 29, 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
4,331 reviews

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,331 reviews
Southwest
8.0
Very good
4,331 reviews

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 35m. 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 34% 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 marts 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$286Average$367FlexibilityNo cancel feeOn-time63%

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