Cheap Flights from Castries (SLU) to Union Island (UNI)

Popular airlines from George F. L. Charles Airport (SLU) to Union Island (UNI)

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Frequently asked questions

How much does a flight from George F. L. Charles Airport (SLU) to Union Island (UNI) cost?
Lock in a cheap one-way flight or cheap return flight from George F. L. Charles Airport (SLU) to Union Island (UNI) 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 George F. L. Charles Airport (SLU) to Union Island (UNI)?
is the most affordable month to fly from SLU to UNI. Traveling during quieter months is often the key to finding better fares.
What is the cheapest airline that flies from George F. L. Charles Airport (SLU) to Union Island (UNI)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find the carrier with the cheapest SLU to UNI flight.
How many flights per day from George F. L. Charles Airport (SLU) to Union Island (UNI)?
There aren't any daily nonstop flights departing from George F. L. Charles Airport (SLU) to Union Island (UNI). But you can opt for flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be soaring above the clouds before you know it.
What day of the week has the most flights from SLU to UNI?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change based on a range of factors, such as 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 George F. L. Charles Airport (SLU) to Union Island (UNI)?
To arrive at Union Island (UNI) on schedule, book a flight that leaves George F. L. Charles Airport (SLU) 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.
What airports do you fly into for Union Island from George F. L. Charles Airport (SLU)?
Argyle Intl. Airport (SVD) is the only airport in Union Island with direct flights from George F. L. Charles Airport (SLU). Check out the available options and discover affordable fares on Expedia.
Is it cheaper to buy a plane ticket from George F. L. Charles Airport (SLU) to Union Island (UNI) last-minute?
Last-minute bookings from SLU to UNI are generally more expensive. To lock in the lowest rates, start searching for flights as early as possible. That said, if you can play around with your travel dates, you may land a cheap fare right before your trip.
Is it cheaper to book a SLU to UNI flight and hotel package?
Opting for a SLU to UNI flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip in one place. Choose from our impressive range of stays and then add activities, flights and car rentals 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 George F. L. Charles Airport (SLU) to Union Island (UNI)?
If you reserved your SLU to UNI 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 have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for further details.

Travel information

Travel information

Origin airport
George F. L. Charles
Destination airport
Union Island
Distance
102 mi

Book with confidence

Book with confidence

Castries to Union Island Flights

The cheapest times to fly from Castries to Union Island

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

 

The best time to book a flight from Castries to Union Island

Sunday is one of the best days to book for cheap flights from Castries to Union Island: 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 Castries to Union Island

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 Castries to Union Island in 2025. You can also book with separate airlines for your outbound and return journeys, from 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 Castries to Union Island 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 Castries to Union Island 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.

 

Castries to Union Island Flights

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*Available to One Key members.