$187+ 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 7/27. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — ISP
Aug 7 — Aug 141
Round-trip
1 adult, Economy
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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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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 8, 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 8, 2026.
This Southwest deal was found by Cheapflights users on 7/7. 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 8/18:15 am
GSP
- ISP
1 stop6h 35m
Southwest
Thu 8/64:05 pm
ISP
- GSP
1 stop4h 10m
Southwest
Deal found 7/7![Southwest logo]()
$330
This Kiwi.com deal was found by Cheapflights users on 7/8. 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 9/67:51 pm
GSP
- ISP
1 stop24h 00m
Breeze Airways
Sun 9/275:23 pm
ISP
- GSP
2 stops25h 00m
Breeze Airways
Deal found 7/8![Breeze Airways logo]()
$382
This Kiwi.com deal was found by Cheapflights users on 7/8. 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 9/67:51 pm
GSP
- ISP
1 stop24h 00m
Multiple Airlines
Sun 9/274:13 pm
ISP
- GSP
1 stop23h 34m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$386
This Southwest deal was found by Cheapflights users on 7/4. 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 8/48:15 am
GSP
- ISP
1 stop3h 55m
Southwest
Sat 8/155:30 am
ISP
- GSP
1 stop4h 35m
Southwest
Deal found 7/4![Southwest logo]()
$387
This Southwest deal was found by Cheapflights users on 7/6. 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 8/51:20 pm
GSP
- ISP
1 stop7h 45m
Southwest
Tue 8/1112:55 pm
ISP
- GSP
1 stop6h 30m
Southwest
Deal found 7/6![Southwest logo]()
$392
This Southwest deal was found by Cheapflights users on 7/3. 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.
Fri 9/48:40 am
GSP
- ISP
2 stops12h 50m
Southwest
Sun 9/64:15 pm
ISP
- GSP
1 stop4h 15m
Southwest
Deal found 7/3![Southwest logo]()
$408
This Kiwi.com deal was found by Cheapflights users on 7/4. 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 7/108:45 pm
GSP
- ISP
1 stop13h 08m
Multiple Airlines
Wed 7/1511:57 am
ISP
- GSP
2 stops31h 42m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$448
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 8, 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 8, 2026.
This Southwest deal was found by Cheapflights users on 7/7. 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 8/18:15 am
GSP
- ISP
1 stop6h 35m
Southwest
Thu 8/64:05 pm
ISP
- GSP
1 stop4h 10m
Southwest
Deal found 7/7![Southwest logo]()
$330
This Kiwi.com deal was found by Cheapflights users on 7/8. 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 9/67:51 pm
GSP
- ISP
1 stop24h 00m
Breeze Airways
Sun 9/275:23 pm
ISP
- GSP
2 stops25h 00m
Breeze Airways
Deal found 7/8![Breeze Airways logo]()
$382
This Kiwi.com deal was found by Cheapflights users on 7/8. 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 9/67:51 pm
GSP
- ISP
1 stop24h 00m
Multiple Airlines
Sun 9/274:13 pm
ISP
- GSP
1 stop23h 34m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$386
This Southwest deal was found by Cheapflights users on 7/4. 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 8/48:15 am
GSP
- ISP
1 stop3h 55m
Southwest
Sat 8/155:30 am
ISP
- GSP
1 stop4h 35m
Southwest
Deal found 7/4![Southwest logo]()
$387
This Southwest deal was found by Cheapflights users on 7/6. 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 8/51:20 pm
GSP
- ISP
1 stop7h 45m
Southwest
Tue 8/1112:55 pm
ISP
- GSP
1 stop6h 30m
Southwest
Deal found 7/6![Southwest logo]()
$392
This Southwest deal was found by Cheapflights users on 7/3. 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.
Fri 9/48:40 am
GSP
- ISP
2 stops12h 50m
Southwest
Sun 9/64:15 pm
ISP
- GSP
1 stop4h 15m
Southwest
Deal found 7/3![Southwest logo]()
$408
This Southwest deal was found by Cheapflights users on 7/5. 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 7/208:30 am
GSP
- ISP
1 stop3h 20m
Southwest
Fri 7/245:50 pm
ISP
- GSP
1 stop3h 50m
Southwest
Deal found 7/5![Southwest logo]()
$477
Last-minute flights from Greenville to IslipDiscover last-minute flight deals from Greenville to Islip. Data last updated July 8, 2026 and is based on user searches.
Discover last-minute flight deals from Greenville to Islip. Data last updated July 8, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/4. 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 7/108:45 pm
GSP
- ISP
1 stop13h 08m
Multiple Airlines
Wed 7/1511:57 am
ISP
- GSP
2 stops31h 42m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$448
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 7/178:45 pm
GSP
- ISP
1 stop13h 08m
Multiple Airlines
Sun 7/195:50 pm
ISP
- GSP
2 stops25h 43m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$551
This Southwest deal was found by Cheapflights users on 7/5. 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 7/208:30 am
GSP
- ISP
1 stop3h 20m
Southwest
Fri 7/245:50 pm
ISP
- GSP
1 stop3h 50m
Southwest
Deal found 7/5![Southwest logo]()
$477
This Kiwi.com deal was found by Cheapflights users on 7/6. 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 7/248:45 pm
GSP
- ISP
1 stop13h 08m
Multiple Airlines
Sun 7/267:49 pm
ISP
- GSP
2 stops23h 44m
Multiple Airlines
Deal found 7/6![Multiple Airlines logo]()
$514
This Southwest deal was found by Cheapflights users on 7/7. 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 8/18:15 am
GSP
- ISP
1 stop6h 35m
Southwest
Thu 8/64:05 pm
ISP
- GSP
1 stop4h 10m
Southwest
Deal found 7/7![Southwest logo]()
$330
This Southwest deal was found by Cheapflights users on 7/4. 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 8/48:15 am
GSP
- ISP
1 stop3h 55m
Southwest
Sat 8/155:30 am
ISP
- GSP
1 stop4h 35m
Southwest
Deal found 7/4![Southwest logo]()
$387
This Southwest deal was found by Cheapflights users on 7/6. 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 8/51:20 pm
GSP
- ISP
1 stop7h 45m
Southwest
Tue 8/1112:55 pm
ISP
- GSP
1 stop6h 30m
Southwest
Deal found 7/6![Southwest logo]()
$392
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 8, 2026.
Search for one-way flight options from Greenville to Islip. Find affordable one-way fares based on user searches. Data last updated July 8, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/8. 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 7/278:45 pm
GSP
- ISP
2 stops20h 02m
Breeze Airways
Deal found 7/8![Breeze Airways logo]()
$187
This Southwest deal was found by Cheapflights users on 7/8. 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 7/298:25 am
GSP
- ISP
1 stop5h 20m
Southwest
Deal found 7/8![Southwest logo]()
$204
This Southwest deal was found by Cheapflights users on 7/8. 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 7/271:55 pm
GSP
- ISP
1 stop3h 20m
Southwest
Deal found 7/8![Southwest logo]()
$229
This Southwest deal was found by Cheapflights users on 7/6. 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 7/258:15 am
GSP
- ISP
1 stop6h 35m
Southwest
Deal found 7/6![Southwest logo]()
$234
This KAYAK deal was found by Cheapflights users on 7/4. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/168:37 am
GSP
- ISP
2 stops27h 43m
Breeze Airways
Deal found 7/4![Breeze Airways logo]()
$415
This KAYAK deal was found by Cheapflights users on 7/4. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/138:45 pm
GSP
- ISP
2 stops20h 02m
Breeze Airways
Deal found 7/4![Breeze Airways logo]()
$450
This KAYAK deal was found by Cheapflights users on 7/4. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/178:45 pm
GSP
- ISP
2 stops46h 24m
Breeze Airways
Deal found 7/4![Breeze Airways logo]()
$490
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 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $330 (Southwest) |
One-way from | $187 (Kiwi.com) |
Popular in | December |
Cheapest in | February |
Average price | $355 |
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 8, 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
Sat 8/1
8:15 am-2:50 pm
1 stop6h 35m
Islip Long Island
Thu 8/6
4:05 pm-8:15 pm
1 stop4h 10m
$330
GreenvilleIslip
GSP - ISP
GSPISP
Greenville
Sun 9/6
7:51 pm-7:51 pm
1 stop24h 00m
Islip Long Island
Sun 9/27
5:23 pm-6:23 pm
2 stops25h 00m
$382
GreenvilleIslip
GSP - ISP
GSPISP
Greenville
Sun 9/6
7:51 pm-7:51 pm
1 stop24h 00m
Islip Long Island
Sun 9/27
4:13 pm-3:47 pm
1 stop23h 34m
$386
GreenvilleIslip
GSP - ISP
GSPISP
Greenville
Tue 8/4
8:15 am-12:10 pm
1 stop3h 55m
Islip Long Island
Sat 8/15
5:30 am-10:05 am
1 stop4h 35m
$387
GreenvilleIslip
GSP - ISP
GSPISP
Greenville
Wed 8/5
1:20 pm-9:05 pm
1 stop7h 45m
Islip Long Island
Tue 8/11
12:55 pm-7:25 pm
1 stop6h 30m
$392
GreenvilleIslip
GSP - ISP
GSPISP
Greenville
Fri 9/4
8:40 am-9:30 pm
2 stops12h 50m
Islip Long Island
Sun 9/6
4:15 pm-8:30 pm
1 stop4h 15m
$408
Quickest round-trip
GreenvilleIslip
GSP - ISP
GSPISP
Greenville
Mon 7/20
8:30 am-11:50 am
1 stop3h 20m
Islip Long Island
Fri 7/24
5:50 pm-9:40 pm
1 stop3h 50m
$477
Cheapest one-way
GreenvilleIslip
GSP - ISP
GSPISP
Greenville
Mon 7/27
8:45 pm-4:47 pm
2 stops20h 02m
$187
Quickest one-way
GreenvilleIslip
GSP - ISP
GSPISP
Greenville
Wed 7/29
8:25 am-1:45 pm
1 stop5h 20m
$204
GreenvilleIslip
GSP - ISP
GSPISP
Greenville
Sat 7/25
8:15 am-2:50 pm
1 stop6h 35m
$234
Showing 1-10 of 12 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 8, 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
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
7.9
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Comfort
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
7.9
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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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 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$291 | Average$432 | FlexibilityNo cancel fee | On-time63% |