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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 12/19. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — ISP
Nov 19 — Nov 261
Wed 11/19
Wed 11/26
1 adult, Economy
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Cheap 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 October 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$203
(Kiwi.com)

One-way from

$184
(Southwest)

Popular in

May

Cheapest in

April

Average price

$362
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
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One-way flight from Greenville to Islip Long Island
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Highest demand for flights based on searches. 11% potential increase in price ($52 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 20, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/18. 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.
Fri 10/318:03 pmGSP - ISP
1 stop14h 34mMultiple Airlines
Sun 11/29:27 pmISP - GSP
1 stop21h 56mMultiple Airlines
Deal found 10/18$203
This Kiwi.com deal was found by Cheapflights users on 10/18. 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.
Thu 10/308:03 pmGSP - ISP
1 stop22h 25mMultiple Airlines
Sun 11/29:27 pmISP - GSP
1 stop21h 56mMultiple Airlines
Deal found 10/18$264
This Kiwi.com deal was found by Cheapflights users on 10/18. 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.
Fri 10/318:03 pmGSP - ISP
1 stop14h 34mMultiple Airlines
Sat 11/18:45 pmISP - GSP
1 stop14h 08mMultiple Airlines
Deal found 10/18$269
This Southwest deal was found by Cheapflights users on 10/19. 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 12/218:20 pmGSP - ISP
1 stop3h 35mSouthwest
Tue 1/66:00 amISP - GSP
1 stop4h 40mSouthwest
Deal found 10/19$297
This Kiwi.com deal was found by Cheapflights users on 10/18. 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.
Thu 10/308:03 pmGSP - ISP
1 stop22h 25mBreeze Airways
Sat 11/18:45 pmISP - GSP
1 stop14h 08mBreeze Airways
Deal found 10/18$325
This Kiwi.com deal was found by Cheapflights users on 10/20. 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 11/38:03 pmGSP - ISP
1 stop21h 39mMultiple Airlines
Thu 11/611:40 amISP - GSP
2 stops9h 34mMultiple Airlines
Deal found 10/20$342

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 October 20, 2025.
Use the filters below to find and compare flights from Greenville to Islip that are best for you.

Fly from

Greenville

Fly to

Islip

Route

Depart

Return

Price

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

Fri 10/31

8:03 pm-10:37 am

1 stop14h 34m

Islip Long Island

Sun 11/2

9:27 pm-7:23 pm

1 stop21h 56m

$203

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

Thu 10/30

8:03 pm-6:28 pm

1 stop22h 25m

Islip Long Island

Sun 11/2

9:27 pm-7:23 pm

1 stop21h 56m

$264

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

Fri 10/31

8:03 pm-10:37 am

1 stop14h 34m

Islip Long Island

Sat 11/1

8:45 pm-10:53 am

1 stop14h 08m

$269

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

Sun 12/21

8:20 pm-11:55 pm

1 stop3h 35m

Islip Long Island

Tue 1/6

6:00 am-10:40 am

1 stop4h 40m

$297

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

Mon 11/3

8:03 pm-5:42 pm

1 stop21h 39m

Islip Long Island

Thu 11/6

11:40 am-9:14 pm

2 stops9h 34m

$342

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

Fri 1/30

6:15 pm-9:55 pm

1 stop3h 40m

Islip Long Island

Sun 2/1

4:05 pm-8:20 pm

1 stop4h 15m

$367

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

Fri 12/19

8:20 pm-11:55 pm

1 stop3h 35m

$184

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

Fri 12/19

10:41 am-8:07 pm

2 stops33h 26m

$223

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/19

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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice 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 $40). Flying from Greenville to Islip, New York in September is currently the most expensive (average of $68). 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.

What is the cheapest time of day to fly from GSP to ISP?

Find hourly flight availability from Greenville to Islip. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 20, 2025.

One of the essential ways to save on airfare from Greenville to Islip, New York is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight at noon could potentially save you up to 37% on airfare.

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 October 20, 2025.
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
4,239 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,239 reviews
Southwest
8.0
Very good
4,239 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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.

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

    Southwest, at $282, was found to be the cheapest airline from Greenville to Islip, New York.. Southwest is priced at 28% 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 $40). Flying from Greenville to Islip, New York in September is currently the most expensive (average of $68). 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?

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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 October 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$282Average$362FlexibilityNo cancel feeOn-time63%

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