$2,769 Cheap Flights from Sydney (SYD) to Castries (SLU)

View $2,769 flight on Tue, May 26, 2026Opens in a new window

Popular airlines from Sydney Airport (SYD) to George F. L. Charles Airport (SLU)

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 30% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Sydney to Castries (SYD-SLU)

Prices were available within the past 7 days and start at $2,769 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

How much does a flight from Kingsford Smith Intl. Airport (SYD) to George F. L. Charles Airport (SLU) cost?
Grab a cheap one-way flight from $2,769 or cheap return flight from Kingsford Smith Intl. Airport (SYD) 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 Kingsford Smith Intl. Airport (SYD) to George F. L. Charles Airport (SLU)?
is the least expensive month to fly from SYD to SLU. Traveling during quieter months is often the key to better flight prices.
What is the cheapest airline that flies from Kingsford Smith Intl. Airport (SYD) to George F. L. Charles Airport (SLU)?
To find the cheapest airline flying from SYD to SLU, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Kingsford Smith Intl. Airport (SYD) to George F. L. Charles Airport (SLU)?
There are no daily nonstop flights departing from Kingsford Smith Intl. Airport (SYD) to George F. L. Charles Airport (SLU). But you can choose flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be on your way in no time.
What day of the week has the most flights from SYD to SLU?
Generally you'll find the widest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* However, this can vary based on the season, airline 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 Kingsford Smith Intl. Airport (SYD) to George F. L. Charles Airport (SLU)?
Choose a flight from Kingsford Smith Intl. Airport (SYD) to George F. L. Charles Airport (SLU) that leaves before 3 PM to reduce the risk of delays and cancellations. Departures after this time 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 Kingsford Smith Intl. Airport (SYD) to George F. L. Charles Airport (SLU) last-minute?
Booking your flight from SYD to SLU just before your journey is usually more expensive. But if there's some wiggle room with your travel times and dates, you could score a cheap last-minute fare.
Is it cheaper to book a SYD to SLU flight and hotel package?
You'll generally save money by booking a SYD 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 place. Once you've chosen your preferred flights and accommodations, consider adding extras including activities, tours and car rentals.
Can I cancel or change the date of my flight from Kingsford Smith Intl. Airport (SYD) to George F. L. Charles Airport (SLU)?
You can usually reschedule or cancel your SYD to SLU flight. However, if it's been more than 24 hours since booking, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Origin airport
Kingsford Smith Intl.
Destination airport
George F. L. Charles
Distance
10001 mi

Book with confidence

Sydney to Castries Flights

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

 

The best time to book a flight from Sydney to Castries

Sunday is one of the best days to book for cheap flights from Sydney 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 Sydney 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 Sydney to Castries in 2026. You can also book with separate airlines for your outbound and return journeys, from $2,769 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 Sydney 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 Sydney 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.

 

Sydney to Castries Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

Explore a world of travel with Expedia