ISP - GSP

$127 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 12/15. 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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Flight Deals
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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

Fri, Nov 21 - Sun, Nov 23
Multiple Airlines Logo
11:32 am - 7:23 pmISP-GSP
7h 51m1 stop
Multiple Airlines Logo
8:03 pm - 6:28 pmGSP-ISP
22h 25m1 stop
$384Multiple Airlines
Find Deal
Sun, Nov 16 - Sun, Nov 16
Southwest Logo
5:50 am - 9:45 amISP-GSP
3h 55m1 stop
Southwest Logo
8:00 pm - 11:50 pmGSP-ISP
3h 50m1 stop
$417Southwest
Find Deal
Wed, Nov 5 - Sun, Nov 9
Breeze Airways Logo
8:45 pm - 9:53 amISP-GSP
13h 08m1 stop
Breeze Airways Logo
8:03 pm - 8:07 pmGSP-ISP
24h 04m2 stops
$565Breeze Airways
Find Deal
Fri, Nov 21 - Sun, Nov 23
Multiple Airlines Logo
11:32 am - 7:23 pmISP-GSP
7h 51m1 stop
Multiple Airlines Logo
10:33 am - 6:56 pmGSP-ISP
8h 23m2 stops
$601Multiple Airlines
Find Deal
Wed, Nov 5 - Sun, Nov 9
Breeze Airways Logo
8:45 pm - 9:53 amISP-GSP
13h 08m1 stop
Breeze Airways Logo
8:03 pm - 6:28 pmGSP-ISP
22h 25m1 stop
$605Breeze Airways
Find Deal
Fri, Nov 21 - Sun, Nov 23
Southwest Logo
11:05 am - 7:25 pmISP-GSP
8h 20m2 stops
Southwest Logo
8:00 am - 10:35 pmGSP-ISP
14h 35m2 stops
$663Southwest
Find Deal
Thu, Nov 6 - Sun, Nov 9
Breeze Airways Logo
11:40 am - 9:14 pmISP-GSP
9h 34m2 stops
Breeze Airways Logo
8:03 pm - 6:28 pmGSP-ISP
22h 25m1 stop
$754Breeze Airways
Find Deal
Thu, Nov 6 - Sun, Nov 9
Breeze Airways Logo
11:40 am - 9:14 pmISP-GSP
9h 34m2 stops
Breeze Airways Logo
8:03 pm - 6:28 pmGSP-ISP
22h 25m1 stop
$764Breeze Airways
Find Deal
Thu, Nov 6 - Sun, Nov 9
Breeze Airways Logo
11:40 am - 9:14 pmISP-GSP
9h 34m2 stops
Breeze Airways Logo
8:03 pm - 6:28 pmGSP-ISP
22h 25m1 stop
$829Breeze Airways
Find Deal
Wed, Nov 5 - Sun, Nov 9
Breeze Airways Logo
8:21 pm - 8:16 amISP-GSP
35h 55m2 stops
Breeze Airways Logo
8:03 pm - 8:07 pmGSP-ISP
24h 04m2 stops
$870Breeze Airways
Find Deal

Everything you should know

Top airlines
Southwest
Cheapest • from $417 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$384
Multiple Airlines
Fri 11/21Sun 11/23
ISP - GSP • 1 stop
Cheapest one-way
$127
Multiple Airlines
Mon 12/15
ISP - GSP • 1 stop
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$127
Best time to beat the crowds with an average 41% drop in price.
Most popular time to fly with an average 5% 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 $127 for a one-way ticket and $384 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 4237 reviews
8.6Crew
8.0Comfort
8.1Boarding
7.0Food
7.5Entertainment
Airline reviews

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

10.0 ExcellentStacy, Oct 2025SMF - DEN
Read more Southwest reviews

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

Great flight. Outstanding Service. Southwest was able to put us on a direct flight to Denver when the connection could have been affected by a later arrival to Baltimore. The direct flight was less expensive that the flight with the connection in Baltimore.

Delays delays delays. Late taking off, late landing, wait for a gate, etc.

Boarded on time but once we were ready for take off, the crew determined that, although every seat was taken, somehow someone was on the wrong flight. Delay, delay delay, announcements and ended up with one person checking EVERY ID against their passenger Manifest only to figure out it was a "clerical error." We departed 54 minutes late causing me to run in the St. Louis Airport to make my connection and lose the priority boarding spot I had paid for. Unnecessary delay.

I was re-booked onto another flight because my original flight was delayed and I would have missed my connector. I ended up in the “C” group after paying extra to be in the “A “ group on the original flight. At least if you’re going to re-book people, re-book them into the same group.

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

mandatory demand customer to check their carry on because not enough people check bags.

Connecting flight is on time and boarding was a breeze!

Excellent. Would encourage Southwest to keep current boarding procedures with free style seating. Makes for a fantastic experience

As always, the entire Southwest experience was perfect. Purchasing the tickets on the Southwest web site was effortless, departure and arrival gates were spotless and comfortable, plane was clean and comfortable, crew was excellent and flight was on time. Wheelchair service in Las Vegas at departure was somewhat chaotic and disjointed, but I am not sure if that was Southwest problem, airport problem or combination.

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

Information on your arrival and departure airports

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