ISP - GSP

$184 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 5/24. 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
$314
Southwest
Sat 4/18Tue 4/21
ISP - GSP • 1 stop
Cheapest one-way
$184
Southwest
Sun 5/24
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!
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, Apr 18 - Tue, Apr 21
Southwest Logo
4:40 pm - 9:35 pm
ISP
-
GSP
4h 55m
1 stop
Southwest Logo
8:20 am - 11:55 am
GSP
-
ISP
3h 35m
1 stop
$314Southwest
Sat, Apr 18 - Tue, Apr 21
Southwest Logo
12:15 pm - 8:40 pm
ISP
-
GSP
8h 25m
2 stops
Southwest Logo
8:20 am - 1:50 pm
GSP
-
ISP
5h 30m
1 stop
$319Southwest
Sat, Apr 18 - Tue, Apr 21
Southwest Logo
12:15 pm - 8:40 pm
ISP
-
GSP
8h 25m
2 stops
Southwest Logo
1:55 pm - 10:40 pm
GSP
-
ISP
8h 45m
2 stops
$324Southwest
Thu, Mar 5 - Thu, Mar 12
Multiple Airlines Logo
3:34 pm - 7:38 pm
ISP
-
GSP
28h 04m
1 stop
Multiple Airlines Logo
4:46 pm - 12:47 pm
GSP
-
ISP
20h 01m
2 stops
$346Multiple Airlines
Thu, Mar 5 - Thu, Mar 12
Multiple Airlines Logo
3:34 pm - 7:38 pm
ISP
-
GSP
28h 04m
1 stop
Multiple Airlines Logo
2:12 pm - 9:48 am
GSP
-
ISP
19h 36m
1 stop
$359Multiple Airlines
Fri, Apr 17 - Mon, Apr 20
Southwest Logo
4:30 pm - 8:55 pm
ISP
-
GSP
4h 25m
1 stop
Southwest Logo
12:35 pm - 11:30 pm
GSP
-
ISP
10h 55m
2 stops
$382Southwest
Sat, Feb 28 - Mon, Mar 2
Southwest Logo
4:45 pm - 8:50 pm
ISP
-
GSP
4h 05m
1 stop
Southwest Logo
6:35 pm - 10:20 pm
GSP
-
ISP
3h 45m
1 stop
$387Southwest
Thu, May 7 - Sun, May 10
Southwest Logo
6:50 am - 5:50 pm
ISP
-
GSP
11h 00m
2 stops
Southwest Logo
12:25 pm - 11:45 pm
GSP
-
ISP
11h 20m
2 stops
$397Southwest
Thu, Feb 19 - Mon, Feb 23
Multiple Airlines Logo
3:34 pm - 7:38 pm
ISP
-
GSP
28h 04m
1 stop
Multiple Airlines Logo
8:47 pm - 8:40 am
GSP
-
ISP
35h 53m
2 stops
$400Multiple Airlines
Thu, Apr 30 - Mon, May 4
Southwest Logo
12:30 pm - 10:15 pm
ISP
-
GSP
9h 45m
2 stops
Southwest Logo
8:10 am - 4:30 pm
GSP
-
ISP
8h 20m
1 stop
$408Southwest
Booking Insights

Good to know

Low seasonApril
Cheapest flight$184
Best time to beat the crowds with an average 47% drop in price.
Most popular time to fly and prices are also 5% lower on average.
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 $184 for a one-way ticket and $314 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 4278 reviews
8.1Boarding
8.6Crew
8.0Comfort
7.0Food
7.5Entertainment
Airline reviews

I was assigned seat 7E, yet my boarding was Group 5, which caused me to have to put my luggage in the back of the plance above `19 or 20 aisle, as passengers who had boarded earlier took the overhead bins in the front. SW needs to monitor bin space and ensure that bin space above the seat are aligned to those sitting near their seats. Also the seating assignments needs to align with group number. Maybe board those last first and so on? Having said the ALL the passengers on the plane were gracious enough to allow me and other passengers in this dilema to retrieve our luggage and helped us along the way. I always love the flight staff, as always their fantastic and I can't rave about them enough!

6.0 GoodMusarrat, Feb 2026
DAL - BWI
Read more Southwest reviews

I was assigned seat 7E, yet my boarding was Group 5, which caused me to have to put my luggage in the back of the plance above `19 or 20 aisle, as passengers who had boarded earlier took the overhead bins in the front. SW needs to monitor bin space and ensure that bin space above the seat are aligned to those sitting near their seats. Also the seating assignments needs to align with group number. Maybe board those last first and so on? Having said the ALL the passengers on the plane were gracious enough to allow me and other passengers in this dilema to retrieve our luggage and helped us along the way. I always love the flight staff, as always their fantastic and I can't rave about them enough!

I appreciate the staff who allowed me to board though I arrived a little late! Regarding the assigned seating, I had booked my flight before this change and wasn't aware of the change at the time, and so I didn't select a seat at booking as I didn't realize it was relevant. Better communication about the change would have been helpful for preparing.

Flight attendants very hospitable and friendly. Pilot flew a smooth take off and landing.

Paid for premium extra leg room but the bin space for rows 1-3 had to go in rows 4-6 and 4-6 had to go to 7-9 because flight attendants have snacks and their luggage upfront. So we pay extra to have to fight thru traffic to get our bags. Only 2nd day of new seating so hope they fix this.

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled. No snack or drink on this flight.

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled.

The wifi on the plane is great. The only issue that I have is that I prefer an aisle seat and on my trips this week, I was either in the middle or window. If we can work to secure aisle seating, I will be thrilled. Nice trip.

All good except once again bags took an hour at Midway Airport Happens all the time. Ridiculous

Everything went smoothly and we even arrived a little bit early.

Great vacation. Can't wait till next year for another one.

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

Information on your arrival and departure airports

Islip (ISP)
Greenville (GSP)