$598+ 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 12/30. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — ISP
Dec 4 — Dec 111
1 adult, Economy
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Find cheap flights from Greenville to Islip 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 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 November 4, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Popular in | May |
Cheapest in | April |
Average price | $356 |
Find flight deals from Greenville to Islip
Cheapest flights from Greenville to IslipExplore 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 November 4, 2025.
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 November 4, 2025.
This Southwest deal was found by Cheapflights users on 11/3. 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 11/47:40 amGSP - ISP
1 stop4h 35mSouthwest
Sun 11/95:50 amISP - GSP
1 stop3h 55mSouthwest
Deal found 11/3![Southwest logo]()
$757
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 November 4, 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
Tue 12/30
2:06 pm-7:42 pm
1 stop5h 36m
$598
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 November.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Greenville-Islip, New York flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Greenville-Islip, New York flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 November 4, 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 November 4, 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.
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
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.
Traveling to a place near Islip?
Book flights to Islip if you plan to visit one of these locationsRiverhead
Southampton
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Alternative routes for Greenville to Islip
See prices for flight routes from nearby airports that may be better suited for you.
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 November 4, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$282 | Average$362 | FlexibilityNo cancel fee | On-time63% |