$204+ 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 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — ISP
Sep 22 — Sep 291
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
Cheapest
Best
Last-minute
One-way
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 August 23, 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 August 23, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/19. 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.
Fri 9/116:55 pm -
1 stop22h 03m
Wed 9/165:43 pm -
1 stop26h 06m
Deal found 8/19![Multiple Airlines logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 8/19. 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.
Mon 9/148:32 pm -
1 stop20h 26m
Sun 9/275:28 pm -
2 stops47h 46m
Deal found 8/19![Multiple Airlines logo]()
$352
This Southwest deal was found by Cheapflights users on 8/18. 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.
Fri 12/118:15 am -
1 stop3h 30m
Tue 12/156:05 am -
1 stop4h 40m
Deal found 8/18![Southwest logo]()
$366
This Kiwi.com deal was found by Cheapflights users on 8/22. 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 10/89:35 am -
2 stops24h 53m
Mon 10/126:55 pm -
1 stop14h 59m
Deal found 8/22![Multiple Airlines logo]()
$369
This Southwest deal was found by Cheapflights users on 8/19. 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.
Fri 9/117:00 am -
2 stops14h 35m
Wed 9/1610:55 am -
2 stops10h 05m
Deal found 8/19![Southwest logo]()
$379
This Southwest deal was found by Cheapflights users on 8/20. 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.
Fri 10/22:10 pm -
2 stops9h 00m
Sun 10/45:40 am -
1 stop4h 05m
Deal found 8/20![Southwest logo]()
$381
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 August 23, 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 August 23, 2026.
This Southwest deal was found by Cheapflights users on 8/18. 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.
Fri 12/118:15 am -
1 stop3h 30m
Tue 12/156:05 am -
1 stop4h 40m
Deal found 8/18![Southwest logo]()
$366
This Southwest deal was found by Cheapflights users on 8/19. 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.
Fri 9/117:00 am -
2 stops14h 35m
Wed 9/1610:55 am -
2 stops10h 05m
Deal found 8/19![Southwest logo]()
$379
This Southwest deal was found by Cheapflights users on 8/20. 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.
Fri 10/22:10 pm -
2 stops9h 00m
Sun 10/45:40 am -
1 stop4h 05m
Deal found 8/20![Southwest logo]()
$381
This Southwest deal was found by Cheapflights users on 8/21. 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 9/184:40 pm -
1 stop5h 30m
Fri 9/254:05 pm -
1 stop4h 10m
Deal found 8/21![Southwest logo]()
$396
This Southwest deal was found by Cheapflights users on 8/22. 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 10/86:25 am -
2 stops8h 05m
Mon 10/1211:00 am -
2 stops11h 45m
Deal found 8/22![Southwest logo]()
$413
This Southwest deal was found by Cheapflights users on 8/22. 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 9/58:40 am -
1 stop5h 50m
Fri 9/1110:20 am -
1 stop5h 45m
Deal found 8/22![Southwest logo]()
$477
This Southwest deal was found by Cheapflights users on 8/20. 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.
Fri 9/48:40 am -
2 stops12h 55m
Tue 9/83:20 pm -
1 stop4h 10m
Deal found 8/20![Southwest logo]()
$488
This Southwest deal was found by Cheapflights users on 8/20. 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.
Mon 9/144:40 pm -
1 stop5h 30m
Mon 9/214:05 pm -
1 stop4h 15m
Deal found 8/20![Southwest logo]()
$527
Last-minute flights from Greenville to IslipDiscover last-minute flight deals from Greenville to Islip. Data last updated August 23, 2026 and is based on user searches.
Discover last-minute flight deals from Greenville to Islip. Data last updated August 23, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/22. 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 8/318:45 pm -
1 stop13h 08m
Sun 9/66:46 pm -
2 stops14h 32m
Deal found 8/22![Multiple Airlines logo]()
$444
This Kiwi.com deal was found by Cheapflights users on 8/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/63:40 pm -
1 stop27h 21m
Thu 9/105:43 pm -
1 stop15h 02m
Deal found 8/21![Multiple Airlines logo]()
$468
This Kiwi.com deal was found by Cheapflights users on 8/19. 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.
Fri 9/116:55 pm -
1 stop22h 03m
Wed 9/165:43 pm -
1 stop26h 06m
Deal found 8/19![Multiple Airlines logo]()
$244
This Southwest deal was found by Cheapflights users on 8/19. 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.
Fri 9/117:00 am -
2 stops14h 35m
Wed 9/1610:55 am -
2 stops10h 05m
Deal found 8/19![Southwest logo]()
$379
This Kiwi.com deal was found by Cheapflights users on 8/19. 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.
Mon 9/148:32 pm -
1 stop20h 26m
Sun 9/275:28 pm -
2 stops47h 46m
Deal found 8/19![Multiple Airlines logo]()
$352
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 9/148:32 pm -
1 stop20h 26m
Mon 9/2111:52 am -
2 stops23h 57m
Deal found 8/20![Multiple Airlines logo]()
$473
This Southwest deal was found by Cheapflights users on 8/21. 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 9/184:40 pm -
1 stop5h 30m
Fri 9/254:05 pm -
1 stop4h 10m
Deal found 8/21![Southwest logo]()
$396
This Kiwi.com deal was found by Cheapflights users on 8/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/186:03 pm -
2 stops17h 17m
Fri 9/256:48 pm -
1 stop24h 56m
Deal found 8/21![Multiple Airlines logo]()
$407
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 August 23, 2026.
Search for one-way flight options from Greenville to Islip. Find affordable one-way fares based on user searches. Data last updated August 23, 2026.
This Southwest deal was found by Cheapflights users on 8/23. 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 11/2512:45 pm -
2 stops10h 50m
Deal found 8/23![Southwest logo]()
$204
This Southwest deal was found by Cheapflights users on 8/22. 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 9/58:40 am -
1 stop5h 50m
Deal found 8/22![Southwest logo]()
$239
This Kiwi.com deal was found by Cheapflights users on 8/23. 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 11/2512:44 pm -
3 stops21h 33m
Deal found 8/23![Multiple Airlines logo]()
$432
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 August 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $244 (Kiwi.com) |
One-way from | $239 (Southwest) |
Popular in | August |
Cheapest in | February |
Average price | $391 |
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 August 23, 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
Quickest round-trip
GreenvilleIslip
GSP Greenville - ISP Islip Long Island
GSPISP
Greenville
Fri 12/11
8:15 am-11:45 am
1 stop3h 30m
Islip Long Island
Tue 12/15
6:05 am-10:45 am
1 stop4h 40m
$366
GreenvilleIslip
GSP Greenville - ISP Islip Long Island
GSPISP
Greenville
Fri 9/11
7:00 am-9:35 pm
2 stops14h 35m
Islip Long Island
Wed 9/16
10:55 am-9:00 pm
2 stops10h 05m
$379
GreenvilleIslip
GSP Greenville - ISP Islip Long Island
GSPISP
Greenville
Fri 10/2
2:10 pm-11:10 pm
2 stops9h 00m
Islip Long Island
Sun 10/4
5:40 am-9:45 am
1 stop4h 05m
$381
GreenvilleIslip
GSP Greenville - ISP Islip Long Island
GSPISP
Greenville
Fri 9/18
4:40 pm-10:10 pm
1 stop5h 30m
Islip Long Island
Fri 9/25
4:05 pm-8:15 pm
1 stop4h 10m
$396
GreenvilleIslip
GSP Greenville - ISP Islip Long Island
GSPISP
Greenville
Thu 10/8
6:25 am-2:30 pm
2 stops8h 05m
Islip Long Island
Mon 10/12
11:00 am-10:45 pm
2 stops11h 45m
$413
GreenvilleIslip
GSP Greenville - ISP Islip Long Island
GSPISP
Greenville
Sat 9/5
8:40 am-2:30 pm
1 stop5h 50m
Islip Long Island
Fri 9/11
10:20 am-4:05 pm
1 stop5h 45m
$477
GreenvilleIslip
GSP Greenville - ISP Islip Long Island
GSPISP
Greenville
Fri 9/4
8:40 am-9:35 pm
2 stops12h 55m
Islip Long Island
Tue 9/8
3:20 pm-7:30 pm
1 stop4h 10m
$488
GreenvilleIslip
GSP Greenville - ISP Islip Long Island
GSPISP
Greenville
Mon 9/14
4:40 pm-10:10 pm
1 stop5h 30m
Islip Long Island
Mon 9/21
4:05 pm-8:20 pm
1 stop4h 15m
$527
Cheapest one-way
GreenvilleIslip
GSP Greenville - ISP Islip Long Island
GSPISP
Greenville
Wed 11/25
12:45 pm-11:35 pm
2 stops10h 50m
$204
Quickest one-way
GreenvilleIslip
GSP Greenville - ISP Islip Long Island
GSPISP
Greenville
Sat 9/5
8:40 am-2:30 pm
1 stop5h 50m
$239
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 August.
| 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 August 23, 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
Food
7.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Comfort
8.0
Food
7.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Crew
8.6
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.
Traveling to a place near Islip?
Book flights to Islip if you plan to visit one of these locationsRiverhead
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Islip flight routes
Other flight options
Other flights from Greenville
Popular flights
Alternative routes for Greenville to Islip
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Islip by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Greenville to Islip by cabin class
Find flights from Greenville to Islip, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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 August 23, 2026.
Greenville and Islip flights
Browse other Greenville and Islip flight options. Last updated on August 23, 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 August 23, 2026.
Popular flight searches
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 August 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$318 | Average$432 | FlexibilityNo cancel fee | On-time63% |