ISP - GSP

$194 Find Cheap Flights from Islip to Greenville

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Islip to Greenville departing on 7/18. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Greenville

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to Greenville, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to Greenville, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$340
Typical prices: $728-$598
Southwest
Thu 9/17Tue 9/22
ISP - GSP • 1 stop
Cheapest one-way
$194
Southwest
Sat 7/18
ISP - GSP • 1 stop
Top airlines
Southwest
Cheapest • from $403 (round-trip)
Southwest
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Islip and Greenville. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
When to travel
August
Cheapest • 39% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Greenville!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Islip to Greenville (ISP-GSP)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Islip to Greenville that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Islip to Greenville

Thu, Sep 17 - Tue, Sep 22
Southwest Logo
10:20 am - 4:05 pm
ISP
-
GSP
5h 45m
1 stop
Southwest Logo
8:10 am - 12:10 pm
GSP
-
ISP
4h 00m
1 stop
$340Southwest
Thu, Sep 17 - Tue, Sep 22
Southwest Logo
6:10 am - 12:30 pm
ISP
-
GSP
6h 20m
2 stops
Southwest Logo
8:10 am - 12:10 pm
GSP
-
ISP
4h 00m
1 stop
$357Southwest
Thu, Oct 15 - Sun, Oct 18
Southwest Logo
6:00 am - 1:25 pm
ISP
-
GSP
7h 25m
1 stop
Southwest Logo
8:15 am - 11:50 am
GSP
-
ISP
3h 35m
1 stop
$403Southwest
Thu, Oct 15 - Sun, Oct 18
Southwest Logo
12:35 pm - 9:25 pm
ISP
-
GSP
8h 50m
1 stop
Southwest Logo
12:45 pm - 11:35 pm
GSP
-
ISP
10h 50m
2 stops
$409Southwest
Sat, Jul 4 - Fri, Jul 10
Southwest Logo
6:05 am - 11:55 am
ISP
-
GSP
5h 50m
1 stop
Southwest Logo
1:55 pm - 11:45 pm
GSP
-
ISP
9h 50m
2 stops
$412Southwest
Sat, Jul 4 - Fri, Jul 10
Southwest Logo
9:05 am - 7:10 pm
ISP
-
GSP
10h 05m
2 stops
Southwest Logo
1:55 pm - 11:45 pm
GSP
-
ISP
9h 50m
2 stops
$417Southwest
Thu, Sep 17 - Tue, Sep 22
Southwest Logo
6:10 am - 12:30 pm
ISP
-
GSP
6h 20m
2 stops
Southwest Logo
11:00 am - 9:05 pm
GSP
-
ISP
10h 05m
2 stops
$429Southwest
Thu, Jul 9 - Sun, Jul 12
Southwest Logo
9:10 am - 1:15 pm
ISP
-
GSP
4h 05m
1 stop
Southwest Logo
7:55 am - 11:45 am
GSP
-
ISP
3h 50m
1 stop
$447Southwest
Thu, Jul 9 - Sun, Jul 12
Southwest Logo
3:05 pm - 10:55 pm
ISP
-
GSP
7h 50m
2 stops
Southwest Logo
7:55 am - 11:45 am
GSP
-
ISP
3h 50m
1 stop
$452Southwest
Thu, Oct 15 - Sun, Oct 18
Southwest Logo
6:50 am - 8:25 pm
ISP
-
GSP
13h 35m
2 stops
Southwest Logo
12:45 pm - 11:35 pm
GSP
-
ISP
10h 50m
2 stops
$455Southwest
Booking Insights

KAYAK's insights & trends for Islip to Greenville flights

Get data-powered insights and trends into flights from Islip to Greenville to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Islip, New York to Greenville?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Islip, New York to Greenville departing in September.

What is the cheapest month to fly from Islip to Greenville?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Islip to Greenville, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Islip to Greenville is August, where tickets cost $301 (return) on average. On the other hand, the most expensive months are May and December, where the average cost of round-trip tickets is $796 and $756 respectively.

Find deals

Good to know

Low seasonAugust
Cheapest flight$194
Best time to beat the crowds with an average 39% drop in price.
Most popular time to fly with an average 61% increase in price.
Flight from Islip to Greenville

When to book flights from Islip to Greenville

Are your dates flexible? Find out the best times to travel from Islip to Greenville based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Islip to Greenville

  • What is the cheapest flight from Islip to Greenville?

    In the last 5 days, the lowest price for a flight from Islip to Greenville was $194 for a one-way ticket and $403 for a round-trip.

  • Do I need a passport to fly between Islip and Greenville?

    No

  • Which airports will I be using when flying from Islip to Greenville?

    When flying out of Islip you will be using Islip Long Island. You will be landing at Greenville, also known as Greenville.

  • Which aircraft models fly most regularly from Islip to Greenville?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Islip to Greenville?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Islip to Greenville.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Islip to Greenville?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Greenville from Islip is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Islip to Greenville?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Greenville with an airline and back to Islip with another airline. Booking your flights between Islip and GSP can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Islip to Greenville?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Greenville from Islip up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Islip to Greenville

 
See real verified KAYAK customer reviews for airlines flying from Islip to Greenville. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Islip to Greenville? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
SouthwestOverall score based on 4235 reviews
8.6Crew
8.0Comfort
7.5Entertainment
7.0Food
8.1Boarding
Airline reviews

Flight was delayed over 3 hours. Planes were dirty. Staff indifferent. And they serve vegan pretzels as snacks.

2.0 MediocreMatthew, Jun 2026
CVG - MDW
Read more Southwest reviews

Flight was delayed over 3 hours. Planes were dirty. Staff indifferent. And they serve vegan pretzels as snacks.

It was great. The gate staff were very helpful in Portland when my son forgot his rolling bag and had to go back to get it just in time to make it on the plane. We really appreciate that. Great job!

Airline is not very senior friendly. Flights are late, forcing us to run to the connecting flight. Food is awful. Wish they would go back to pretzels and peanuts. During flight, pressurization isn’t quite right and all of our ears get plugged. Everything is nickel and dime, charging for boarding, seat selection and legroom. While a screen at the desk in the gate area says check your roll on bag now for free due to space limitation, the employee at the desk will not check the bag without a $100 fee. Insane.

Kayak could’ve posted the correct gate number. Almost missed my flight.

Slow boarding, limited food and drink portions. Bad delays and turbulence

there were two flight attendants that were up front...that were the best! They get KUDOs for making my trip only fantastic. Tell them Jeff said that!

OKay. I sat in the back of the plane and it was really loud between babies and little kids, and adults who.like to talk a lot and loudly most of the flight.

Flight coming out of Buffalo was delayed, so we had to be rescheduled on another flight from Baltimore to Phoenix which means we had a long layover and got home 3.5 hours late. Shuttle to parking stopped at 10pm, so we had to pay for an Uber to the parking lot and got charged an extra day of parking since it was after midnight. Not the best experience. Long day!

Was fine, delayed and feels like southwest is always late

I don't know why flying out of Sarasota requires two plane changes.

Everything you need to know for your flight from Islip to Greenville

Information on your arrival and departure airports

Islip (ISP)
Greenville (GSP)