ISP - GSP

$152 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 7/15. 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
$303
Typical prices: $327-$462
Southwest
Sat 10/10Tue 10/13
ISP - GSP • 1 stop
Cheapest one-way
$152
Southwest
Wed 7/15
ISP - GSP • 1 stop
Top airlines
Southwest
Cheapest • from $303 (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 • 42% 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

Sat, Oct 10 - Tue, Oct 13
Southwest Logo
6:00 am - 10:05 am
ISP
-
GSP
4h 05m
1 stop
Southwest Logo
8:35 am - 12:30 pm
GSP
-
ISP
3h 55m
1 stop
$303Southwest
Sat, Oct 10 - Tue, Oct 13
Southwest Logo
6:00 am - 10:05 am
ISP
-
GSP
4h 05m
1 stop
Southwest Logo
10:50 am - 7:35 pm
GSP
-
ISP
8h 45m
2 stops
$308Southwest
Sat, Oct 10 - Tue, Oct 13
Southwest Logo
6:50 am - 7:25 pm
ISP
-
GSP
12h 35m
2 stops
Southwest Logo
10:50 am - 7:35 pm
GSP
-
ISP
8h 45m
2 stops
$355Southwest
Fri, Jul 17 - Tue, Jul 21
Southwest Logo
5:50 pm - 9:40 pm
ISP
-
GSP
3h 50m
1 stop
Southwest Logo
1:50 pm - 10:40 pm
GSP
-
ISP
8h 50m
1 stop
$360Southwest
Tue, Jul 21 - Sat, Jul 25
Southwest Logo
12:25 pm - 10:05 pm
ISP
-
GSP
9h 40m
2 stops
Southwest Logo
12:50 pm - 11:00 pm
GSP
-
ISP
10h 10m
2 stops
$365Southwest
Fri, Jul 17 - Tue, Jul 21
Southwest Logo
3:05 pm - 10:55 pm
ISP
-
GSP
7h 50m
2 stops
Southwest Logo
1:50 pm - 10:40 pm
GSP
-
ISP
8h 50m
1 stop
$366Southwest
Mon, Jul 27 - Sun, Aug 30
Multiple Airlines Logo
1:00 pm - 3:06 pm
ISP
-
GSP
26h 06m
2 stops
Multiple Airlines Logo
3:47 pm - 9:53 am
GSP
-
ISP
18h 06m
1 stop
$374Multiple Airlines
Mon, Jul 27 - Sun, Aug 30
Multiple Airlines Logo
7:46 pm - 3:06 pm
ISP
-
GSP
19h 20m
1 stop
Multiple Airlines Logo
3:47 pm - 9:53 am
GSP
-
ISP
18h 06m
1 stop
$387Multiple Airlines
Fri, Jul 24 - Fri, Jul 31
Southwest Logo
5:50 pm - 9:40 pm
ISP
-
GSP
3h 50m
1 stop
Southwest Logo
1:55 pm - 5:15 pm
GSP
-
ISP
3h 20m
1 stop
$392Southwest
Fri, Jul 24 - Fri, Jul 31
Southwest Logo
9:10 am - 6:15 pm
ISP
-
GSP
9h 05m
2 stops
Southwest Logo
1:55 pm - 5:15 pm
GSP
-
ISP
3h 20m
1 stop
$398Southwest
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 October.

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$152
Best time to beat the crowds with an average 42% drop in price.
Most popular time to fly with an average 53% 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 $152 for a one-way ticket and $303 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 4246 reviews
8.6Crew
7.0Food
7.5Entertainment
8.0Comfort
8.1Boarding
Airline reviews

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!

2.0 MediocreDawn, Jun 2026
BUF - BWI
Read more Southwest reviews

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!

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

We had a 5 hour delay on the tarmac in Baltimore

Check-in, Boarding and flight were smooth. All the employees and crew was very nice and funny. They gave the kids crayons and workbooks to keep them occupied which was a big win. I’ve flown Southwest many times and that’s the first time I’ve seen that and it is a great addition.

Airline travel is always too cramped to really be pleasant, but the cabin crew on this flight did a pretty good job of making up for it by putting on some music during boarding and sprinkling a few funny remarks into the safety briefing and announcements, and just generally being friendly and helpful. It definitely reminded me of why I prefer the in-flight experience on Southwest!

Flight was delayed due to plane not passing inspection And one of the crew had to time out and we had to wait for another one A 3 hour delay

It was one and half hour late... Not sure if any other experience matters.

It was 2 hours 45 minutes late, for no apparently clear reason.

It went well. Plane wasn't full. Will be great when assigned seating is in place

My bag was damaged and is now missing a wheel. I tried to buy a claim in on the website but it would not accept my confirmation # for submission. Other than that, everything else was good!

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

Information on your arrival and departure airports

Islip (ISP)
Greenville (GSP)