$502 Cheap Flights from Jacksonville (JAX) to Castries (SLU)

View $502 flight on Fri, May 8, 2026Opens in a new window

Popular airlines from Jacksonville International Airport (JAX) to George F. L. Charles Airport (SLU)

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Cheap Flights from Jacksonville to Castries (JAX-SLU)

Prices were available within the past 7 days and start at $502 for one-way flights and $1,371 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, Dec 14 - Thu, Dec 18
JAX
Jacksonville
SLU
Castries
$1,371 Roundtrip, found 5 days ago
$1,371
Roundtrip
found 5 days ago
Select United flight, departing Sun, Dec 14 from Jacksonville to Castries, returning Thu, Dec 18, priced at $1,371 found 5 days ago

Find the cheapest month to fly from Jacksonville (JAX) to Castries (SLU)

January is typically the cheapest month to fly

From $455 - $1,001 per traveler.

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 $653
UVF
Hewanorra Intl.
Cheapest
Average driving time to city center53 min
Flights from $653

Frequently asked questions

How much does a flight from Jacksonville Intl. Airport (JAX) to George F. L. Charles Airport (SLU) cost?
Lock in a cheap one-way flight from $502 or cheap return flight from $1,371 from Jacksonville Intl. Airport (JAX) 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 deals on this route.
What is the cheapest month to fly from Jacksonville Intl. Airport (JAX) to George F. L. Charles Airport (SLU)?
The cheapest month to fly from JAX to SLU is December, when there's less demand. Off-peak season is generally when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Jacksonville Intl. Airport (JAX) to George F. L. Charles Airport (SLU)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll take you from JAX to SLU. Then, sort your results by "Price (lowest to highest)" to pick up the best deal available.
How many flights per day from Jacksonville Intl. Airport (JAX) to George F. L. Charles Airport (SLU)?
Direct flights from Jacksonville Intl. Airport (JAX) 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 Expedia's filter tool. Enter your travel details and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from JAX to SLU?
Usually you'll find the widest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* However, this can change based on the airline, season and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Jacksonville Intl. Airport (JAX) to George F. L. Charles Airport (SLU)?
To avoid possible delays on the Jacksonville Intl. Airport (JAX) to George F. L. Charles Airport (SLU) route, travel before 3 PM. Departures after this time are 22% more likely to be canceled.**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 Jacksonville Intl. Airport (JAX) to George F. L. Charles Airport (SLU) last-minute?
Last-minute fares from JAX to SLU are usually more expensive. To lock in the lowest prices, start looking for flights as early as possible. That being said, if you're flexible with your travel plans, you may land a cheap ticket just before your departure.
Is it cheaper to book a JAX to SLU flight and hotel package?
Opting for a JAX to SLU flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Pick from our extensive range of stays and then add car rentals, activities and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Jacksonville Intl. Airport (JAX) to George F. L. Charles Airport (SLU)?
In most instances, you can modify or cancel your JAX to SLU flight. However, additional fees may apply, especially if you booked more than 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you'd like more details, head to our Customer Service portal.

Travel information

Origin airport
Jacksonville Intl.
Destination airport
George F. L. Charles
Roundtrip price
$1,370
Distance
1738 mi

Book with confidence

Jacksonville to Castries Flights

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

 

The best time to book a flight from Jacksonville to Castries

Sunday is one of the best days to book for cheap flights from Jacksonville 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 Jacksonville 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 Jacksonville to Castries in 2025. You can also book with separate airlines for your outbound and return journeys, from $502 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 Jacksonville 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 Jacksonville 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.

 

Jacksonville to Castries Flights

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*Available to One Key members.