$155+ 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 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — ISP
Aug 29 — Sep 51
Round-trip
1 adult, Economy
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Find cheap flights from Greenville to Islip with Cheapflights
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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
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Best
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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 July 30, 2026.
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 July 30, 2026.
This Southwest deal was found by Cheapflights users on 7/28. 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 9/21:20 pm
GSP
- ISP
1 stop3h 35m
Southwest
Wed 9/912:55 pm
ISP
- GSP
1 stop6h 35m
Southwest
Deal found 7/28![Southwest logo]()
$309
This Southwest deal was found by Cheapflights users on 7/25. 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.
Mon 8/248:40 am
GSP
- ISP
1 stop3h 55m
Southwest
Mon 8/316:10 am
ISP
- GSP
2 stops6h 20m
Southwest
Deal found 7/25![Southwest logo]()
$314
This Southwest deal was found by Cheapflights users on 7/28. 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 9/81:20 pm
GSP
- ISP
1 stop7h 50m
Southwest
Tue 9/1512:55 pm
ISP
- GSP
2 stops8h 05m
Southwest
Deal found 7/28![Southwest logo]()
$320
This Southwest deal was found by Cheapflights users on 7/28. 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 8/274:40 pm
GSP
- ISP
1 stop5h 25m
Southwest
Mon 8/316:10 am
ISP
- GSP
2 stops6h 20m
Southwest
Deal found 7/28![Southwest logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
Thu 9/38:37 am
GSP
- ISP
2 stops27h 43m
Multiple Airlines
Wed 9/95:43 pm
ISP
- GSP
1 stop26h 06m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$344
This Southwest deal was found by Cheapflights users on 7/26. 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.
Thu 9/34:40 pm
GSP
- ISP
1 stop5h 30m
Southwest
Wed 9/96:05 am
ISP
- GSP
1 stop4h 10m
Southwest
Deal found 7/26![Southwest logo]()
$353
This Southwest deal was found by Cheapflights users on 7/27. 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 8/306:55 pm
GSP
- ISP
1 stop3h 40m
Southwest
Mon 8/316:10 am
ISP
- GSP
2 stops6h 20m
Southwest
Deal found 7/27![Southwest logo]()
$368
Best flights from Greenville to IslipDiscover carefully curated flight deals from Greenville to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 30, 2026.
Discover carefully curated flight deals from Greenville to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 30, 2026.
This Southwest deal was found by Cheapflights users on 7/26. 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.
Tue 9/18:15 am
GSP
- ISP
1 stop3h 55m
Southwest
Tue 9/86:05 am
ISP
- GSP
1 stop4h 10m
Southwest
Deal found 7/26![Southwest logo]()
$309
This Southwest deal was found by Cheapflights users on 7/26. 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.
Mon 8/248:40 am
GSP
- ISP
1 stop3h 55m
Southwest
Mon 8/316:10 am
ISP
- GSP
2 stops6h 20m
Southwest
Deal found 7/26![Southwest logo]()
$314
This Southwest deal was found by Cheapflights users on 7/27. 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 8/306:55 pm
GSP
- ISP
1 stop3h 40m
Southwest
Mon 8/316:10 am
ISP
- GSP
2 stops6h 20m
Southwest
Deal found 7/27![Southwest logo]()
$368
This Southwest deal was found by Cheapflights users on 7/28. 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 9/248:40 am
GSP
- ISP
1 stop3h 55m
Southwest
Sun 9/274:35 pm
ISP
- GSP
1 stop3h 55m
Southwest
Deal found 7/28![Southwest logo]()
$386
This Southwest deal was found by Cheapflights users on 7/27. 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 9/238:15 am
GSP
- ISP
1 stop3h 55m
Southwest
Sun 9/276:20 am
ISP
- GSP
1 stop3h 50m
Southwest
Deal found 7/27![Southwest logo]()
$386
This Southwest deal was found by Cheapflights users on 7/29. 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.
Sat 8/298:40 am
GSP
- ISP
1 stop5h 50m
Southwest
Sun 8/306:20 am
ISP
- GSP
1 stop3h 50m
Southwest
Deal found 7/29![Southwest logo]()
$386
Last-minute flights from Greenville to IslipDiscover last-minute flight deals from Greenville to Islip. Data last updated July 30, 2026 and is based on user searches.
Discover last-minute flight deals from Greenville to Islip. Data last updated July 30, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 7/25. 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.
Mon 8/248:40 am
GSP
- ISP
1 stop3h 55m
Southwest
Mon 8/316:10 am
ISP
- GSP
2 stops6h 20m
Southwest
Deal found 7/25![Southwest logo]()
$314
This Southwest deal was found by Cheapflights users on 7/28. 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 8/274:40 pm
GSP
- ISP
1 stop5h 25m
Southwest
Mon 8/316:10 am
ISP
- GSP
2 stops6h 20m
Southwest
Deal found 7/28![Southwest logo]()
$337
This Southwest deal was found by Cheapflights users on 7/29. 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.
Sat 8/298:40 am
GSP
- ISP
1 stop5h 50m
Southwest
Sun 8/306:20 am
ISP
- GSP
1 stop3h 50m
Southwest
Deal found 7/29![Southwest logo]()
$386
This Southwest deal was found by Cheapflights users on 7/27. 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 8/306:55 pm
GSP
- ISP
1 stop3h 40m
Southwest
Mon 8/316:10 am
ISP
- GSP
2 stops6h 20m
Southwest
Deal found 7/27![Southwest logo]()
$368
One-way flights from Greenville to IslipSearch for one-way flight options from Greenville to Islip. Find affordable one-way fares based on user searches. Data last updated July 30, 2026.
Search for one-way flight options from Greenville to Islip. Find affordable one-way fares based on user searches. Data last updated July 30, 2026.
This Southwest deal was found by Cheapflights users on 7/26. 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.
Mon 8/174:40 pm
GSP
- ISP
1 stop5h 25m
Southwest
Deal found 7/26![Southwest logo]()
$155
This Southwest deal was found by Cheapflights users on 7/27. 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 9/238:15 am
GSP
- ISP
1 stop3h 55m
Southwest
Deal found 7/27![Southwest logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
Mon 8/173:13 pm
GSP
- ISP
2 stops22h 15m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
Mon 8/1712:06 pm
GSP
- ISP
3 stops25h 22m
Breeze Airways
Deal found 7/26![Breeze Airways logo]()
$210
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/38:20 am
GSP
- ISP
2 stops29h 22m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 7/27. 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.
Wed 9/238:24 pm
GSP
- ISP
3 stops44h 34m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$216
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
Sun 8/28:25 am
GSP
- ISP
1 stop25h 28m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$238
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 8/38:45 pm
GSP
- ISP
2 stops16h 57m
Breeze Airways
Deal found 7/27![Breeze Airways logo]()
$243
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 July 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $309 (Southwest) |
One-way from | $155 (Southwest) |
Popular in | December |
Cheapest in | February |
Average price | $359 |
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 July 30, 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
Cheapest round-trip
GreenvilleIslip
GSP - ISP
GSPISP
Greenville
Tue 9/1
8:15 am-12:10 pm
1 stop3h 55m
Islip Long Island
Tue 9/8
6:05 am-10:15 am
1 stop4h 10m
$309
GreenvilleIslip
GSP - ISP
GSPISP
Greenville
Mon 8/24
8:40 am-12:35 pm
1 stop3h 55m
Islip Long Island
Mon 8/31
6:10 am-12:30 pm
2 stops6h 20m
$314
GreenvilleIslip
GSP - ISP
GSPISP
Greenville
Sun 8/30
6:55 pm-10:35 pm
1 stop3h 40m
Islip Long Island
Mon 8/31
6:10 am-12:30 pm
2 stops6h 20m
$368
GreenvilleIslip
GSP - ISP
GSPISP
Greenville
Thu 9/24
8:40 am-12:35 pm
1 stop3h 55m
Islip Long Island
Sun 9/27
4:35 pm-8:30 pm
1 stop3h 55m
$386
Quickest round-trip
GreenvilleIslip
GSP - ISP
GSPISP
Greenville
Wed 9/23
8:15 am-12:10 pm
1 stop3h 55m
Islip Long Island
Sun 9/27
6:20 am-10:10 am
1 stop3h 50m
$386
GreenvilleIslip
GSP - ISP
GSPISP
Greenville
Sat 8/29
8:40 am-2:30 pm
1 stop5h 50m
Islip Long Island
Sun 8/30
6:20 am-10:10 am
1 stop3h 50m
$386
Cheapest one-way
GreenvilleIslip
GSP - ISP
GSPISP
Greenville
Mon 8/17
4:40 pm-10:05 pm
1 stop5h 25m
$155
GreenvilleIslip
GSP - ISP
GSPISP
Greenville
Wed 9/23
8:15 am-12:10 pm
1 stop3h 55m
$178
GreenvilleIslip
GSP - ISP
GSPISP
Greenville
Mon 8/17
12:06 pm-1:28 pm
3 stops25h 22m
$210
GreenvilleIslip
GSP - ISP
GSPISP
Greenville
Sun 8/2
8:25 am-9:53 am
1 stop25h 28m
$238
Showing 1-10 of 14 resultsSorted 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 July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| 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 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.
GSP-ISP
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.
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 July 30, 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.
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Food
7.0
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Food
7.0
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
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.
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Book flights to Islip if you plan to visit one of these locationsRiverhead
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Other flights to Islip
Explore flights to Islip departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 30, 2026.
Greenville and Islip flights
Browse other Greenville and Islip flight options. Last updated on July 30, 2026.
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Browse through other flights departing from Greenville. Flights are based on user searches made on Cheapflights and were last updated on July 30, 2026.
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Check out other popular destinations found by fellow travelers in 2026
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 July 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$311 | Average$432 | FlexibilityNo cancel fee | On-time63% |