ISP - GSP

$297 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 11/15. 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

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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

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, Nov 15 - Mon, Nov 17
Southwest Logo
6:00 am - 9:45 amISP-GSP
3h 45m1 stop
Southwest Logo
7:40 am - 12:15 pmGSP-ISP
4h 35m1 stop
$297Southwest
Find Deal
Wed, Oct 15 - Wed, Oct 22
Southwest Logo
6:00 am - 10:00 amISP-GSP
4h 00m1 stop
Southwest Logo
6:05 am - 12:25 pmGSP-ISP
6h 20m1 stop
$298Southwest
Find Deal
Sat, Nov 15 - Sat, Nov 22
Southwest Logo
6:00 am - 9:45 amISP-GSP
3h 45m1 stop
Southwest Logo
6:15 pm - 11:55 pmGSP-ISP
5h 40m2 stops
$302Southwest
Find Deal
Sat, Oct 25 - Tue, Oct 28
Southwest Logo
6:05 am - 6:15 pmISP-GSP
12h 10m2 stops
Southwest Logo
6:05 am - 12:25 pmGSP-ISP
6h 20m1 stop
$343Southwest
Find Deal
Sat, Oct 4 - Wed, Oct 8
Southwest Logo
6:55 am - 6:15 pmISP-GSP
11h 20m2 stops
Southwest Logo
6:05 am - 12:25 pmGSP-ISP
6h 20m1 stop
$357Southwest
Find Deal
Wed, Oct 15 - Wed, Oct 22
Southwest Logo
6:00 am - 10:00 amISP-GSP
4h 00m1 stop
Southwest Logo
6:05 am - 4:20 pmGSP-ISP
10h 15m2 stops
$358Southwest
Find Deal
Sat, Nov 15 - Mon, Nov 17
Multiple Airlines Logo
9:59 am - 8:49 pmISP-GSP
10h 50m2 stops
Multiple Airlines Logo
5:28 pm - 11:04 amGSP-ISP
17h 36m2 stops
$861Multiple Airlines
Find Deal
Sat, Feb 21 - Sun, Feb 22
Breeze Airways Logo
11:50 am - 1:12 pmISP-GSP
25h 22m2 stops
Breeze Airways Logo
9:47 pm - 11:14 amGSP-ISP
37h 27m3 stops
$984Breeze Airways
Find Deal
Fri, Oct 17 - Sun, Oct 19
Breeze Airways Logo
8:47 pm - 9:53 amISP-GSP
37h 06m2 stops
Breeze Airways Logo
9:24 pm - 9:58 amGSP-ISP
36h 34m3 stops
$1,008Breeze Airways
Find Deal
Sat, Feb 21 - Sun, Feb 22
Breeze Airways Logo
11:50 am - 1:12 pmISP-GSP
25h 22m3 stops
Breeze Airways Logo
9:47 pm - 11:14 amGSP-ISP
37h 27m3 stops
$1,238Breeze Airways
Find Deal

Everything you should know

Top airlines
Southwest
Cheapest • from $297 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$297
Southwest
Sat 11/15Mon 11/17
ISP - GSP • 1 stop
Cheapest one-way
$400
Breeze Airways
Fri 11/21
ISP - GSP • 2 stops
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!
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.

What’s the cheapest day of the week to fly from Islip to Greenville?

The average price of all round-trip flights from Islip to Greenville clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Greenville on a Wednesday and more expensive on a Tuesday. On your return trip to Islip, you should consider flying back on a Wednesday, and avoid Thursdays for better deals.

Good to know

Low seasonApril
Cheapest flight$297
Best time to beat the crowds with an average 42% drop in price.
Most popular time to fly with an average 4% 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 $400 for a one-way ticket and $297 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.
8.0
SouthwestOverall score based on 4242 reviews
8.0Comfort
7.5Entertainment
8.6Crew
8.1Boarding
7.0Food
Airline reviews

I wish they had movie screens in the headrests. The seats are much improved, more legroom and recently renovated. Bathroom was clean. Staff was outstanding!!

10.0 ExcellentG, Sep 2025LAS - ATL
Read more Southwest reviews

I wish they had movie screens in the headrests. The seats are much improved, more legroom and recently renovated. Bathroom was clean. Staff was outstanding!!

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

The weather could have been better. There was a 40 minute ATC delay in SFO because of marine fog and a micro cell storm delayed landing and take-off at Nashville. The gate was changed 5 minutes from boarding from gate B3 to gate C23 at Nashville airport.

After being assaulted by a flight attendant I was then brushed off as oh well because he long braids didn’t mean to whip me in the eye. I have filed complaints and will see. But like any other issue I’ve had with kayak involved it’s been trash. Last time I’ll be using your app

AC sub par. WiFi not working correctly. Ac sucked. Seats very narrow.

Near 4 hour flight with only 1 service. Had to use call button to request water. Internet and power not working until into flight. Internet would stop working during flight.

Southwest's seats are the least comfortable I have ever sat in.

The cabin was quiet for the redeye flight. The area was clean. The staff was great. The 787 Max was in good condition. Drawbacks were that the seat widths were tight for some passengers. The seat padding was at best average and for a long flight uncomfortable.

Southwest like most American domestic airlines, is a mediocre airline. But it is among the cheapest. Oh well.

My flight was delayed 50 minutes and we were rushed to board to then sit for 15 minutes until the pilot arrived. Unacceptable since we could have waited to board. Also the delayed flight was updated AFTER we boarded to more than the 10 minutes as originally stated.

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.