ISP - GSP

$335 Find Cheap Flights from Islip to Greenville

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Islip to Greenville departing on 6/2. 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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Everything you should know

Cheapest round-trip
$335
Typical prices: $381-$379
Southwest
Tue 6/2Tue 6/9
ISP - GSP • 1 stop
Top airlines
Cheapest • from $335 (round-trip)
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
Cheapest • 38% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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

Tue, Jun 2 - Tue, Jun 9
Southwest Logo
6:30 am - 1:10 pm
ISP
-
GSP
6h 40m
1 stop
Southwest Logo
8:25 am - 11:50 am
GSP
-
ISP
3h 25m
1 stop
$335Southwest
Tue, Jun 2 - Tue, Jun 9
Southwest Logo
6:30 am - 4:20 pm
ISP
-
GSP
9h 50m
2 stops
Southwest Logo
8:25 am - 1:45 pm
GSP
-
ISP
5h 20m
1 stop
$354Southwest
Tue, Jun 9 - Tue, Jun 16
Southwest Logo
2:55 pm - 8:15 pm
ISP
-
GSP
5h 20m
1 stop
Southwest Logo
8:25 am - 1:45 pm
GSP
-
ISP
5h 20m
1 stop
$361Southwest
Wed, Jun 10 - Wed, Jun 17
Southwest Logo
4:40 pm - 8:15 pm
ISP
-
GSP
3h 35m
1 stop
Southwest Logo
1:50 pm - 10:35 pm
GSP
-
ISP
8h 45m
1 stop
$366Southwest
Tue, Jun 9 - Tue, Jun 16
Southwest Logo
8:55 am - 7:00 pm
ISP
-
GSP
10h 05m
2 stops
Southwest Logo
8:25 am - 1:45 pm
GSP
-
ISP
5h 20m
1 stop
$380Southwest
Thu, Jul 30 - Thu, Aug 6
Southwest Logo
5:50 pm - 9:35 pm
ISP
-
GSP
3h 45m
1 stop
Southwest Logo
4:40 pm - 10:05 pm
GSP
-
ISP
5h 25m
1 stop
$397Southwest
Wed, Jun 10 - Wed, Jun 17
Southwest Logo
8:55 am - 7:00 pm
ISP
-
GSP
10h 05m
2 stops
Southwest Logo
1:50 pm - 10:35 pm
GSP
-
ISP
8h 45m
1 stop
$398Southwest
Thu, Jul 30 - Thu, Aug 13
Southwest Logo
9:10 am - 1:15 pm
ISP
-
GSP
4h 05m
1 stop
Southwest Logo
1:05 pm - 10:05 pm
GSP
-
ISP
9h 00m
2 stops
$402Southwest
Tue, Jun 9 - Mon, Jun 15
Southwest Logo
2:55 pm - 8:15 pm
ISP
-
GSP
5h 20m
1 stop
Southwest Logo
1:55 pm - 5:15 pm
GSP
-
ISP
3h 20m
1 stop
$406Southwest
Thu, Jul 30 - Thu, Aug 6
Southwest Logo
12:30 pm - 10:50 pm
ISP
-
GSP
10h 20m
2 stops
Southwest Logo
4:40 pm - 10:05 pm
GSP
-
ISP
5h 25m
1 stop
$408Southwest
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 June.

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.

Good to know

Low seasonAugust
Cheapest flight$335
Best time to beat the crowds with an average 39% drop in price.
Most popular time to fly with an average 63% 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 3 days, the lowest price for a flight from Islip to Greenville was $335 for a round-trip ticket.

  • 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 4296 reviews
8.0Comfort
8.6Crew
8.1Boarding
7.5Entertainment
7.0Food
Airline reviews

The checking experience in Orlando was terrible, almost missed the flight. Too many travelers and Southwest completely understaffed.

2.0 MediocreAnonymous, May 2026
MCO - MDW
Read more Southwest reviews

The checking experience in Orlando was terrible, almost missed the flight. Too many travelers and Southwest completely understaffed.

I'm glad it wasn't only 75% full because I could get a good seat

if I was good. Not happy that I have to pay extra money to get the seat I need for lake room, but I guess that’s a sign of the times.

Seats were very comfortable. They tilted back. Drinks and snacks were free and served 3 times. Attendants were awesome.

Plane was clean and comfortable. Flight attendants and gate staff were professional, friendly and efficient. Boarding and deplaning were orderly and efficient. All in all, the typical excellent Southwest experience.

Truly terrible. Will never willingly fly southwest again. Seats are worse than before they switched to assigned seating. One flight attendant was the opposite of helpful (rude, unhelpful, dismissive, and as my stranger seatmate said unprompted: a total prick). This caused me, 15 minutes into the flight, to book an alternate return flight home on a competing airline (first class 1.2k purchase instead of my existing planned flight) just so I would not have to ever be on that aircraft, with that terrible service person, with those horrific seats ever again.

Not having a five hour delay with little notice! The crew was very kind, though, and just as tired as we passengers were. The flight didn't depart until nearly 1 am...and no reason was ever given.

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

no service at all due to turbulence. they should've at least given us snacks, there were only 10 people on the entire flight.

First time I've had to use the disabled accommodations. And I could not have had a better experience with Southwest, i was having trouble getting from one terminal to another due to my heart failure. And the next thing I know a Southwest agent had made sure. I had a wheelchair at all my flights. Can't thank them enough.

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

Information on your arrival and departure airports