$471 Cheap Flights from San Francisco (SFO) to Castries (SLU)

View $471 flight on Sun, May 10, 2026Opens in a new window

Popular airlines from San Francisco Intl. Airport (SFO) to George F. L. Charles Airport (SLU)

Cheap Flights from San Francisco to Castries (SFO-SLU)

Prices were available within the past 7 days and start at $471 for one-way flights and $1,233 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

JetBlue Airways
Sun, Jan 11 - Fri, Jan 23
SFO
San Francisco
SLU
Castries
$1,233 Roundtrip, found 1 day ago
$1,233
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Sun, Jan 11 from San Francisco to Castries, returning Fri, Jan 23, priced at $1,233 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 $772
UVF
Hewanorra Intl.
Cheapest
Average driving time to city center53 min
Flights from $772

Frequently asked questions

How much does a flight from San Francisco Intl. Airport (SFO) to George F. L. Charles Airport (SLU) cost?
Lock in a cheap one-way flight from $471 or cheap return flight from $1,233 from San Francisco Intl. Airport (SFO) 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 offers on this route.
What is the cheapest month to fly from San Francisco Intl. Airport (SFO) to George F. L. Charles Airport (SLU)?
Flying in January can help you save, as it's the cheapest month for flights between SFO and SLU. You'll often find the lowest fares during the off-season.
What is the cheapest airline that flies from San Francisco Intl. Airport (SFO) to George F. L. Charles Airport (SLU)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest SFO to SLU flight.
How many flights per day from San Francisco Intl. Airport (SFO) to George F. L. Charles Airport (SLU)?
Direct flights from San Francisco Intl. Airport (SFO) to George F. L. Charles Airport (SLU) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SFO to SLU?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can vary depending on a range of factors, such as the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from San Francisco Intl. Airport (SFO) to George F. L. Charles Airport (SLU)?
Select a flight from San Francisco Intl. Airport (SFO) to George F. L. Charles Airport (SLU) that leaves before 3 PM to reduce the likelihood of delays. Departures after this hour are on average 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 San Francisco Intl. Airport (SFO) to George F. L. Charles Airport (SLU) last-minute?
Last-minute fares from SFO to SLU are typically more expensive. To secure the lowest rates, start looking for flights as early as possible. That being said, if your travel plans are flexible, you may land a cheap ticket right before you leave.
Is it cheaper to book a SFO to SLU flight and hotel package?
You can save money by booking a SFO to SLU flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. Once you've chosen your ideal flights and accommodations, consider adding extras including tours, car rentals and activities.
Can I cancel or change the date of my flight from San Francisco Intl. Airport (SFO) to George F. L. Charles Airport (SLU)?
If you reserved your SFO to SLU flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the fare type 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, visit our Customer Service portal for more information.

Travel information

Origin airport
San Francisco Intl.
Destination airport
George F. L. Charles
Roundtrip price
$1,232
Distance
4072 mi

Book with confidence

San Francisco to Castries Flights

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

 

The best time to book a flight from San Francisco to Castries

Sunday is one of the best days to book for cheap flights from San Francisco 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 San Francisco 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 San Francisco to Castries in 2025. You can also book with separate airlines for your outbound and return journeys, from $471 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 San Francisco 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 San Francisco 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.

 

San Francisco to Castries Flights

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*Available to One Key members.