$147+ Cheap flights from Greenville to Islip, NY (GSP - ISP)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — ISP
Nov 21 — Nov 281
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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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
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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 October 22, 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 October 22, 2026.
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/198:05 am -
1 stop3h 40m
Sun 11/225:35 am -
1 stop4h 35m
Deal found 10/20![Southwest logo]()
$371
This Southwest deal was found by Cheapflights users on 10/21. 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 11/68:15 am -
1 stop3h 30m
Mon 11/95:40 pm -
1 stop4h 05m
Deal found 10/21![Southwest logo]()
$424
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.
Wed 11/48:24 pm -
2 stops21h 09m
Sun 11/86:33 pm -
1 stop21h 14m
Deal found 10/20![Multiple Airlines logo]()
$439
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/48:05 am -
1 stop3h 40m
Sun 11/85:35 am -
1 stop4h 35m
Deal found 10/20![Southwest logo]()
$517
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/21:00 pm -
1 stop10h 30m
Fri 11/65:40 pm -
1 stop4h 05m
Deal found 10/18![Southwest logo]()
$562
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/158:15 am -
1 stop3h 30m
Sun 11/225:40 pm -
1 stop4h 05m
Deal found 10/18![Southwest logo]()
$572
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.
Sun 11/153:52 pm -
2 stops43h 28m
Sun 11/224:40 pm -
1 stop23h 07m
Deal found 10/18![Multiple Airlines logo]()
$573
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 October 22, 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 October 22, 2026.
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/198:05 am -
1 stop3h 40m
Sun 11/225:35 am -
1 stop4h 35m
Deal found 10/20![Southwest logo]()
$371
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.
Wed 11/48:24 pm -
2 stops21h 09m
Sun 11/86:33 pm -
1 stop21h 14m
Deal found 10/20![Multiple Airlines logo]()
$439
This Southwest deal was found by Cheapflights users on 10/21. 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 11/68:15 am -
1 stop3h 30m
Mon 11/95:40 pm -
1 stop4h 05m
Deal found 10/21![Southwest logo]()
$424
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/48:05 am -
1 stop3h 40m
Sun 11/85:35 am -
1 stop4h 35m
Deal found 10/20![Southwest logo]()
$517
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/21:00 pm -
1 stop10h 30m
Fri 11/65:40 pm -
1 stop4h 05m
Deal found 10/18![Southwest logo]()
$562
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/158:15 am -
1 stop3h 30m
Sun 11/225:40 pm -
1 stop4h 05m
Deal found 10/18![Southwest logo]()
$572
Last-minute flights from Greenville to IslipDiscover last-minute flight deals from Greenville to Islip. Data last updated October 22, 2026 and is based on user searches.
Discover last-minute flight deals from Greenville to Islip. Data last updated October 22, 2026 and is based on user searches.
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/21:00 pm -
1 stop10h 30m
Fri 11/65:40 pm -
1 stop4h 05m
Deal found 10/18![Southwest logo]()
$562
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.
Wed 11/48:24 pm -
2 stops21h 09m
Sun 11/86:33 pm -
1 stop21h 14m
Deal found 10/20![Multiple Airlines logo]()
$439
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/48:05 am -
1 stop3h 40m
Sun 11/85:35 am -
1 stop4h 35m
Deal found 10/20![Southwest logo]()
$517
This Southwest deal was found by Cheapflights users on 10/21. 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 11/68:15 am -
1 stop3h 30m
Mon 11/95:40 pm -
1 stop4h 05m
Deal found 10/21![Southwest logo]()
$424
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/158:15 am -
1 stop3h 30m
Sun 11/225:40 pm -
1 stop4h 05m
Deal found 10/18![Southwest logo]()
$572
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.
Sun 11/153:52 pm -
2 stops43h 28m
Sun 11/224:40 pm -
1 stop23h 07m
Deal found 10/18![Multiple Airlines logo]()
$573
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/198:05 am -
1 stop3h 40m
Sun 11/225:35 am -
1 stop4h 35m
Deal found 10/20![Southwest logo]()
$371
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 October 22, 2026.
Search for one-way flight options from Greenville to Islip. Find affordable one-way fares based on user searches. Data last updated October 22, 2026.
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.
Thu 12/38:05 am -
1 stop8h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Southwest logo]()
$147
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:24 pm -
2 stops21h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Breeze Airways logo]()
$185
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/310:12 am -
2 stops28h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Multiple Airlines logo]()
$226
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.
Wed 10/288:30 am -
1 stop3h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Southwest logo]()
$354
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.
Sat 11/281:55 pm -
1 stop9h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Southwest logo]()
$484
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/283:56 pm -
2 stops25h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Multiple Airlines logo]()
$617
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 October 22, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $371 (Southwest) |
One-way from | $147 (Southwest) |
Popular in | February |
Cheapest in | December |
Average price | $476 |
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 7,457,451 searches. Data last updated October 22, 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 Greenville - ISP Islip Long Island
GSPISP
Greenville
Wed 10/28
8:24 pm-5:33 pm
2 stops21h 09m
Islip Long Island
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$185
GreenvilleIslip
GSP Greenville - ISP Islip Long Island
GSPISP
Greenville
Thu 12/3
10:12 am-2:22 pm
2 stops28h 10m
Islip Long Island
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$226
GreenvilleIslip
GSP Greenville - ISP Islip Long Island
GSPISP
Greenville
Thu 12/3
11:20 am-9:10 pm
2 stops9h 50m
Islip Long Island
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$274
Quickest round-trip
GreenvilleIslip
GSP Greenville - ISP Islip Long Island
GSPISP
Greenville
Wed 10/28
8:30 am-12:10 pm
1 stop3h 40m
Islip Long Island
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$354
GreenvilleIslip
GSP Greenville - ISP Islip Long Island
GSPISP
Greenville
Thu 11/19
8:05 am-11:45 am
1 stop3h 40m
Islip Long Island
Sun 11/22
5:35 am-10:10 am
1 stop4h 35m
$371
GreenvilleIslip
GSP Greenville - ISP Islip Long Island
GSPISP
Greenville
Fri 11/6
8:15 am-11:45 am
1 stop3h 30m
Islip Long Island
Mon 11/9
5:40 pm-9:45 pm
1 stop4h 05m
$424
GreenvilleIslip
GSP Greenville - ISP Islip Long Island
GSPISP
Greenville
Wed 11/4
8:24 pm-5:33 pm
2 stops21h 09m
Islip Long Island
Sun 11/8
6:33 pm-3:47 pm
1 stop21h 14m
$439
GreenvilleIslip
GSP Greenville - ISP Islip Long Island
GSPISP
Greenville
Sat 11/28
1:55 pm-11:45 pm
1 stop9h 50m
Islip Long Island
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$484
GreenvilleIslip
GSP Greenville - ISP Islip Long Island
GSPISP
Greenville
Wed 11/4
8:05 am-11:45 am
1 stop3h 40m
Islip Long Island
Sun 11/8
5:35 am-10:10 am
1 stop4h 35m
$517
GreenvilleIslip
GSP Greenville - ISP Islip Long Island
GSPISP
Greenville
Mon 11/2
1:00 pm-11:30 pm
1 stop10h 30m
Islip Long Island
Fri 11/6
5:40 pm-9:45 pm
1 stop4h 05m
$562
Showing 1-10 of 11 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 October.
| 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 October 22, 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
7.4
Boarding
8.1
Crew
8.6
Overall
7.9
Food
7.0
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Comfort
8.0
Entertainment
7.4
Boarding
8.1
Crew
8.6
Overall
7.9
Food
7.0
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
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
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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 October 22, 2026.
Greenville and Islip flights
Browse other Greenville and Islip flight options. Last updated on October 22, 2026.
Other flights from Greenville
Browse through other flights departing from Greenville. Flights are based on user searches made on Cheapflights and were last updated on October 22, 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 7,457,451 searches. Data last updated October 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$331 | Average$446 | FlexibilityNo cancel fee | On-time63% |