$567 Cheap Flights from Greenville (GSP) to Castries (SLU)

View $567 flight on Thu, Jan 1, 2026Opens in a new window

Popular airlines from Greenville-Spartanburg Intl. Airport (GSP) to George F. L. Charles Airport (SLU)

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Cheap Flights from Greenville to Castries (GSP-SLU)

Prices were available within the past 7 days and start at $567 for one-way flights and $1,214 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, May 27 - Mon, Jun 1
GSP
Greenville
SLU
Castries
$1,214 Roundtrip, found 6 days ago
$1,214
Roundtrip
found 6 days ago
Select United flight, departing Wed, May 27 from Greenville to Castries, returning Mon, Jun 1, priced at $1,214 found 6 days ago

Alternative airports near Castries

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Hewanorra Intl. UVF. Cheapest option available. Average driving time to city center is 53 minutes. Flights from $797
UVF
Hewanorra Intl.
Cheapest
Average driving time to city center53 min
Flights from $797
Flights from Greenville (GSP) to Castries (SLU)
Origin airport
Greenville-Spartanburg Intl.
Destination airport
George F. L. Charles
Roundtrip price
$1,213
Distance
1955 mi

Greenville to Castries Flights

The cheapest times to fly from Greenville to Castries

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Greenville to Castries are during the month of May. You can find some of the cheapest flights from Greenville to Castries with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Greenville to Castries

Sunday is one of the best days to book for cheap flights from Greenville to Castries: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Greenville to Castries

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Greenville to Castries in 2025. You can also book with separate airlines for your outbound and return journeys, from $567 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Greenville to Castries flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Greenville to Castries airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Greenville-Spartanburg Intl. Airport (GSP) to George F. L. Charles Airport (SLU) cost?
Grab a cheap one-way flight from $567 or cheap return flight from $1,214 from Greenville-Spartanburg Intl. Airport (GSP) to George F. L. Charles Airport (SLU) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Greenville-Spartanburg Intl. Airport (GSP) to George F. L. Charles Airport (SLU)?
The cheapest month to fly from GSP to SLU is May, when there's less demand. Off-peak season is often when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Greenville-Spartanburg Intl. Airport (GSP) to George F. L. Charles Airport (SLU)?
Use the filter tool on Expedia to compare different airlines and find the most affordable carrier that'll take you from GSP to SLU. Then, sort your results by "Price (lowest to highest)" to pick up a great deal.
How many flights per day from Greenville-Spartanburg Intl. Airport (GSP) to George F. L. Charles Airport (SLU)?
You'll need to catch a flight with a layover when traveling from Greenville-Spartanburg Intl. Airport (GSP) to George F. L. Charles Airport (SLU). Direct flights don't operate daily on this route. However, simply filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from GSP to SLU?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change based on a number of factors, including the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Greenville-Spartanburg Intl. Airport (GSP) to George F. L. Charles Airport (SLU)?
To touch down at George F. L. Charles Airport (SLU) on schedule, pick a flight that leaves from Greenville-Spartanburg Intl. Airport (GSP) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Greenville-Spartanburg Intl. Airport (GSP) to George F. L. Charles Airport (SLU) last-minute?
Booking your flight from GSP to SLU just before your journey is usually more expensive. However, if there's some wiggle room with your itinerary, you could land a cheap last-minute fare.
Is it cheaper to book a GSP to SLU flight and hotel package?
Securing a GSP to SLU flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Choose from our extensive range of hotels and then add car rentals, flights and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Greenville-Spartanburg Intl. Airport (GSP) to George F. L. Charles Airport (SLU)?
Typically, it's possible to reschedule or cancel your GSP to SLU flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more details on our Customer Service portal.

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*Available to One Key members.