$558 Cheap Flights from St. Thomas (STT) to Castries (SLU)

View $558 flight on Sun, Oct 26, 2025Opens in a new window

Popular airlines from Cyril E. King Airport (STT) to George F. L. Charles Airport (SLU)

Cheap Flights from St. Thomas to Castries (STT-SLU)

Prices were available within the past 7 days and start at $558 for one-way flights and $1,261 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Cape Air
Sun, Oct 19 - Wed, Oct 29
STT
St. Thomas
SLU
Castries
$1,261 Roundtrip, found 1 day ago
$1,261
Roundtrip
found 1 day ago
Select Cape Air flight, departing Sun, Oct 19 from St. Thomas to Castries, returning Wed, Oct 29, priced at $1,261 found 1 day 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 $1,031
UVF
Hewanorra Intl.
Cheapest
Average driving time to city center53 min
Flights from $1,031
Flights from St. Thomas (STT) to Castries (SLU)
Origin airport
Cyril E. King
Destination airport
George F. L. Charles
Roundtrip price
$1,260
Distance
398 mi

St. Thomas to Castries Flights

The cheapest times to fly from St. Thomas 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 St. Thomas to Castries are during the month of October. You can find some of the cheapest flights from St. Thomas to Castries with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Thomas to Castries

Sunday is one of the best days to book for cheap flights from St. Thomas 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 St. Thomas 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 St. Thomas to Castries in 2025. You can also book with separate airlines for your outbound and return journeys, from $558 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 St. Thomas 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 St. Thomas 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 Cyril E. King Airport (STT) to George F. L. Charles Airport (SLU) cost?
Grab a cheap one-way flight from $558 or cheap return flight from $1,261 from Cyril E. King Airport (STT) to George F. L. Charles Airport (SLU) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Cyril E. King Airport (STT) to George F. L. Charles Airport (SLU)?
Flying in October is a great way to save, as it's the cheapest month for flights between STT and SLU. You'll usually find the lowest prices during the off-season.
What is the cheapest airline that flies from Cyril E. King Airport (STT) to George F. L. Charles Airport (SLU)?
To find the cheapest airline that'll fly you from STT to SLU, use Expedia's filter tool. Customize your search based on what's important to you, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Cyril E. King Airport (STT) to George F. L. Charles Airport (SLU)?
Nonstop flights from Cyril E. King Airport (STT) to George F. L. Charles Airport (SLU) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STT to SLU?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can change based on a range of factors, including the carrier 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 Cyril E. King Airport (STT) to George F. L. Charles Airport (SLU)?
Select a flight from Cyril E. King Airport (STT) to George F. L. Charles Airport (SLU) that leaves before 3 PM to reduce the risk of delays and cancellations. Departures after this time have a 22% higher chance of being canceled, on average.**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 Cyril E. King Airport (STT) to George F. L. Charles Airport (SLU) last-minute?
Holding off until just before your trip to book your flight from STT to SLU generally means paying more. While you may come across some last-minute discounts, they're not always guaranteed. Keep your travel plans flexible to maximize your chances of snagging a bargain.
Is it cheaper to book a STT to SLU flight and hotel package?
Compared with arranging flights and hotels separately, booking a STT to SLU flight and hotel package with Expedia could result in significant savings. Better still, having it all in one place will take the stress out of travel planning. Just pick your flights and choose from our extensive range of hotels, then customize your trip with other add-ons like activities, tours and car rentals.
Can I cancel or change the date of my flight from Cyril E. King Airport (STT) to George F. L. Charles Airport (SLU)?
If you reserved your STT to SLU flight in the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you want more information.

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*Available to One Key members.