GSP - ISP

$209 Find Cheap Flights from Greenville to Islip

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Greenville to Islip departing on 7/31. 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 Islip

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Greenville to Islip, 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 Greenville to Islip, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$341
Multiple Airlines
Sun 5/10Tue 5/19
GSP - ISP • 1 stop
Cheapest one-way
$209
Southwest
Fri 7/31
GSP - ISP • 1 stop
Top airlines
Southwest
Cheapest • from $350 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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We hope you love your trip to Islip!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Greenville to Islip (GSP-ISP)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Greenville to Islip 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 Greenville to Islip

Sun, May 10 - Tue, May 19
Multiple Airlines Logo
9:33 am - 9:13 am
GSP
-
ISP
23h 40m
1 stop
Multiple Airlines Logo
5:27 pm - 7:33 am
ISP
-
GSP
38h 06m
2 stops
$341Multiple Airlines
Sun, May 10 - Tue, May 19
Southwest Logo
12:25 pm - 11:45 pm
GSP
-
ISP
11h 20m
2 stops
Southwest Logo
4:10 pm - 8:00 pm
ISP
-
GSP
3h 50m
1 stop
$350Southwest
Sun, May 10 - Tue, May 19
Southwest Logo
12:25 pm - 11:45 pm
GSP
-
ISP
11h 20m
2 stops
Southwest Logo
6:30 am - 4:20 pm
ISP
-
GSP
9h 50m
2 stops
$355Southwest
Thu, Feb 26 - Sun, Mar 1
Southwest Logo
8:30 am - 12:25 pm
GSP
-
ISP
3h 55m
1 stop
Southwest Logo
5:35 am - 10:10 am
ISP
-
GSP
4h 35m
1 stop
$387Southwest
Sun, May 10 - Tue, May 19
Southwest Logo
8:00 am - 11:50 am
GSP
-
ISP
3h 50m
1 stop
Southwest Logo
4:10 pm - 8:00 pm
ISP
-
GSP
3h 50m
1 stop
$396Southwest
Thu, Feb 26 - Sun, Mar 1
Southwest Logo
7:40 pm - 11:30 pm
GSP
-
ISP
3h 50m
1 stop
Southwest Logo
5:35 am - 7:05 pm
ISP
-
GSP
13h 30m
2 stops
$408Southwest
Tue, Feb 17 - Sat, Feb 21
Southwest Logo
6:35 pm - 10:20 pm
GSP
-
ISP
3h 45m
1 stop
Southwest Logo
5:30 am - 10:00 am
ISP
-
GSP
4h 30m
1 stop
$447Southwest
Tue, Feb 17 - Sat, Feb 21
Southwest Logo
8:20 am - 11:55 am
GSP
-
ISP
3h 35m
1 stop
Southwest Logo
7:00 am - 8:50 pm
ISP
-
GSP
13h 50m
2 stops
$452Southwest
Thu, Feb 26 - Sun, Mar 1
Southwest Logo
10:50 am - 5:00 pm
GSP
-
ISP
6h 10m
2 stops
Southwest Logo
5:35 am - 7:05 pm
ISP
-
GSP
13h 30m
2 stops
$483Southwest
Tue, Feb 17 - Sat, Feb 21
Southwest Logo
10:45 am - 10:20 pm
GSP
-
ISP
11h 35m
2 stops
Southwest Logo
7:00 am - 8:50 pm
ISP
-
GSP
13h 50m
2 stops
$503Southwest
Booking Insights

KAYAK's insights & trends for Greenville to Islip flights

Get data-powered insights and trends into flights from Greenville to Islip to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Greenville to Islip?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Greenville to Islip were found on Southwest ($350) and Breeze Airways ($663).

Find deals

Good to know

Low seasonApril
Cheapest flight$209
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly and prices are also 10% lower on average.
Flight from Greenville to Islip

When to book flights from Greenville to Islip

Are your dates flexible? Find out the best times to travel from Greenville to Islip 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 Greenville to Islip

  • What is the cheapest flight from Greenville to Islip?

    In the last 3 days, the lowest price for a flight from Greenville to Islip was $209 for a one-way ticket and $341 for a round-trip.

  • Do I need a passport to fly between Greenville and Islip?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which aircraft models fly most regularly from Greenville to Islip?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Greenville to Islip?

    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 Greenville to Islip.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Greenville to Islip?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Islip from Greenville 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 Greenville to Islip?

    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 Islip with an airline and back to Greenville with another airline. Booking your flights between Greenville and ISP 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 Greenville to Islip?

    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 Islip from Greenville 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 Greenville to Islip

 
See real verified KAYAK customer reviews for airlines flying from Greenville to Islip. 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 Greenville to Islip? 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 4274 reviews
8.6Crew
8.1Boarding
7.5Entertainment
7.0Food
8.0Comfort
Airline reviews

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.

10.0 ExcellentMeghan, Feb 2026
MCO - DEN
Read more Southwest reviews

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.

Great flight but super high price. Glad it was a business trip and not personal

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

Information on your arrival and departure airports

Greenville (GSP)
Islip (ISP)