HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Islip

$184+ Cheap flights from Greenville to Islip (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 11/26. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — ISP
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
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

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 septiembre 11, 2025.

Round-trip from

$272
(Southwest)

One-way from

$184
(Southwest)

Popular in

May

Cheapest in

April

Average price

$336
From Greenville to Islip Long Island
Search Deals
One-way flight from Greenville to Islip Long Island
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($52 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Greenville to Islip

Cheapest flights from Greenville to Islip
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 septiembre 11, 2025.

This Southwest deal was found by Cheapflights users on 9/10. 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.
mié. 10/296:05 amGSP - ISP
1 stop6h 20mSouthwest
dom. 11/25:50 amISP - GSP
1 stop3h 55mSouthwest
Deal found 9/10$272
This Southwest deal was found by Cheapflights users on 9/11. 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.
lun. 12/298:20 pmGSP - ISP
1 stop3h 35mSouthwest
lun. 1/55:30 pmISP - GSP
1 stop4h 05mSouthwest
Deal found 9/11$346
This Southwest deal was found by Cheapflights users on 9/10. 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.
lun. 10/61:50 pmGSP - ISP
1 stop9h 55mSouthwest
lun. 10/135:30 amISP - GSP
1 stop4h 25mSouthwest
Deal found 9/10$402
This Southwest deal was found by Cheapflights users on 9/11. 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.
mié. 10/156:05 amGSP - ISP
1 stop10h 00mSouthwest
vie. 10/175:35 pmISP - GSP
1 stop3h 50mSouthwest
Deal found 9/11$406

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 septiembre 11, 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

mié. 10/29

6:05 am-12:25 pm

1 stop6h 20m

Islip Long Island

dom. 11/2

5:50 am-9:45 am

1 stop3h 55m

$272

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

lun. 12/29

8:20 pm-11:55 pm

1 stop3h 35m

Islip Long Island

lun. 1/5

5:30 pm-9:35 pm

1 stop4h 05m

$346

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

lun. 10/6

1:50 pm-11:45 pm

1 stop9h 55m

Islip Long Island

lun. 10/13

5:30 am-9:55 am

1 stop4h 25m

$402

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

mié. 10/15

6:05 am-4:05 pm

1 stop10h 00m

Islip Long Island

vie. 10/17

5:35 pm-9:25 pm

1 stop3h 50m

$406

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

lun. 10/6

1:50 pm-11:45 pm

1 stop9h 55m

$209

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

mié. 11/26

7:40 am-11:10 pm

2 stops15h 30m

$224

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

mar. 9/16

9:30 am-3:10 pm

1 stop5h 40m

$364

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

mié. 11/26

2:06 pm-10:37 am

3 stops44h 31m

$367

GreenvilleIslip

GSP - ISP

GSPISP

Greenville

lun. 10/6

9:10 pm-1:24 pm

3 stops40h 14m

$596

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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?

Currently, January is the cheapest month in which you can book a flight from Greenville to Islip (average of $108). Flying from Greenville to Islip in November is currently the most expensive (average of $213). 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 septiembre 11, 2025.

One of the essential ways to save on airfare from Greenville to Islip is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 28% 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 septiembre 11, 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.
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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.

  • How long is the flight from Greenville to Islip?

    There are many flights that can get you from Greenville to Islip in 6h 20m. Fly via Southwest to get the fastest option. Greenville and Islip are separated by a distance of 642 mi.

  • What is the cheapest airline to fly from Greenville to Islip round-trip?

    According to our current data, Southwest ($282), offers the cheapest pricing from Greenville to Islip. Southwest is currently priced 28% below the average price you’ll pay for this route.

  • Can I find deals for flights from Greenville to Islip that include hotel bookings?

    Yes. In addition to deals on Greenville to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Greenville to Islip?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Greenville to Islip.

  • Can I find deals for business class flights from Greenville to Islip?

    Yes. Cheapflights offers flight deals from Greenville to Islip by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Greenville to Islip?

    Currently, January is the cheapest month in which you can book a flight from Greenville to Islip (average of $108). Flying from Greenville to Islip in November is currently the most expensive (average of $213). 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.

See more FAQs

Traveling to a place near Islip?

Book flights to Islip if you plan to visit one of these locations
Riverhead
Southampton

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 for Greenville to Islip

See prices for flight routes from nearby airports that may be better suited for you.
Charlotte to John F Kennedy Intl flights
Charlotte to Newark flights
Charlotte to LaGuardia flights
Charleston to Newark flights
Charleston to John F Kennedy Intl flights
Savannah to John F Kennedy Intl flights
Greenville to Newark flights
Charleston to LaGuardia flights
Greenville to John F Kennedy Intl flights
Greenville to LaGuardia flights
Savannah to Newark flights
Charlotte to Buffalo flights
Savannah to LaGuardia flights
Columbia to LaGuardia flights
Columbia to John F Kennedy Intl flights
Columbia to Newark flights
Myrtle Beach to LaGuardia flights
Myrtle Beach to Newark flights
Myrtle Beach to John F Kennedy Intl flights
Charlotte to Albany flights
Charlotte to Syracuse flights
Charlotte to Rochester flights
Myrtle Beach to White Plains flights
Charleston to White Plains flights
Greenville to Buffalo flights
Charleston to Islip flights
Charleston to Stewart flights
Myrtle Beach to Stewart flights
Hilton Head Island to Newark flights
Augusta to John F Kennedy Intl flights
Augusta to LaGuardia flights
Savannah to White Plains flights
Augusta to Newark flights
Greenville to Rochester flights
Greenville to Albany flights
Charleston to Buffalo flights
Hilton Head Island to John F Kennedy Intl flights
Hilton Head Island to LaGuardia flights
Greenville to White Plains flights
Columbia to Rochester flights
Greenville to Stewart flights
Charlotte to Islip flights
Savannah to Albany flights
Charleston to Albany flights
Savannah to Rochester flights
Savannah to Buffalo flights
Greenville to Syracuse flights
Charlotte to White Plains flights
Charlotte to Stewart flights
Columbia to Buffalo flights

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 septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$282Average$354FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.