$293 Cheap Flights from Sioux Falls (FSD) to St. Thomas (STT)

View $293 flight on Sun, Mar 15, 2026Opens in a new window

Popular airlines from Sioux Falls Regional Airport (FSD) to Cyril E. King Airport (STT)

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Cheap Flights from Sioux Falls to St. Thomas (FSD-STT)

Prices were available within the past 7 days and start at $293 for one-way flights and $509 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, Dec 13 - Wed, Dec 17
FSD
Sioux Falls
STT
St. Thomas
$509 Roundtrip, found 2 days ago
$509
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Dec 13 from Sioux Falls to St. Thomas, returning Wed, Dec 17, priced at $509 found 2 days ago
American Airlines
Sun, Apr 26 - Mon, May 4
FSD
Sioux Falls
STT
St. Thomas
$544 Roundtrip, found 13 hours ago
$544
Roundtrip
found 13 hours ago
Select American Airlines flight, departing Sun, Apr 26 from Sioux Falls to St. Thomas, returning Mon, May 4, priced at $544 found 13 hours ago
American Airlines
Sat, Dec 13 - Wed, Dec 17
FSD
Sioux Falls
STT
St. Thomas
$549 Roundtrip, found 2 days ago
$549
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Dec 13 from Sioux Falls to St. Thomas, returning Wed, Dec 17, priced at $549 found 2 days ago
American Airlines
Tue, Dec 2 - Wed, Dec 10
FSD
Sioux Falls
STT
St. Thomas
$554 Roundtrip, found 16 hours ago
$554
Roundtrip
found 16 hours ago
Select American Airlines flight, departing Tue, Dec 2 from Sioux Falls to St. Thomas, returning Wed, Dec 10, priced at $554 found 16 hours ago
Delta
Tue, Apr 21 - Thu, May 14
FSD
Sioux Falls
STT
St. Thomas
$579 Roundtrip, found 10 hours ago
$579
Roundtrip
found 10 hours ago
Select Delta flight, departing Tue, Apr 21 from Sioux Falls to St. Thomas, returning Thu, May 14, priced at $579 found 10 hours ago
Delta
Wed, Jan 7 - Tue, Jan 20
FSD
Sioux Falls
STT
St. Thomas
$589 Roundtrip, found 1 day ago
$589
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Jan 7 from Sioux Falls to St. Thomas, returning Tue, Jan 20, priced at $589 found 1 day ago
American Airlines
Sat, Feb 7 - Fri, Feb 13
FSD
Sioux Falls
STT
St. Thomas
$600 Roundtrip, found 21 hours ago
$600
Roundtrip
found 21 hours ago
Select American Airlines flight, departing Sat, Feb 7 from Sioux Falls to St. Thomas, returning Fri, Feb 13, priced at $600 found 21 hours ago
Delta
Fri, Apr 24 - Thu, Apr 30
FSD
Sioux Falls
STT
St. Thomas
$604 Roundtrip, found 10 hours ago
$604
Roundtrip
found 10 hours ago
Select Delta flight, departing Fri, Apr 24 from Sioux Falls to St. Thomas, returning Thu, Apr 30, priced at $604 found 10 hours ago
American Airlines
Sat, Feb 7 - Fri, Feb 13
FSD
Sioux Falls
STT
St. Thomas
$605 Roundtrip, found 21 hours ago
$605
Roundtrip
found 21 hours ago
Select American Airlines flight, departing Sat, Feb 7 from Sioux Falls to St. Thomas, returning Fri, Feb 13, priced at $605 found 21 hours ago
United
Sun, Apr 19 - Fri, Apr 24
FSD
Sioux Falls
STT
St. Thomas
$617 Roundtrip, found 6 days ago
$617
Roundtrip
found 6 days ago
Select United flight, departing Sun, Apr 19 from Sioux Falls to St. Thomas, returning Fri, Apr 24, priced at $617 found 6 days ago

Alternative airports near St. Thomas

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Cyril E. King STT. Cheapest option available. Flights from $2,147
STT
Cyril E. King
Cheapest
Flights from $2,147

Frequently asked questions

How much does a flight from Sioux Falls Regional Airport (FSD) to Cyril E. King Airport (STT) cost?
Lock in a cheap one-way flight from $293 or cheap return flight from $509 from Sioux Falls Regional Airport (FSD) to Cyril E. King Airport (STT) 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 Sioux Falls Regional Airport (FSD) to Cyril E. King Airport (STT)?
December is the cheapest month to fly from FSD to STT. Traveling during an off-peak travel window is often the key to better flight prices.
What is the cheapest airline that flies from Sioux Falls Regional Airport (FSD) to Cyril E. King Airport (STT)?
Use the filters on Expedia to compare airlines and find the most affordable carrier that'll fly you from FSD to STT. Then, sort your results by "Price (lowest to highest)" to snag the best deal available.
How many flights per day from Sioux Falls Regional Airport (FSD) to Cyril E. King Airport (STT)?
Direct flights from Sioux Falls Regional Airport (FSD) to Cyril E. King Airport (STT) 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 dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from FSD to STT?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Sioux Falls Regional Airport (FSD) to Cyril E. King Airport (STT)?
To avoid possible delays on the Sioux Falls Regional Airport (FSD) to Cyril E. King Airport (STT) route, aim to travel before 3 PM. Later flights have a 22% higher chance of being 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 Sioux Falls Regional Airport (FSD) to Cyril E. King Airport (STT) last-minute?
Booking your ticket from FSD to STT right before your journey is generally more expensive. However, if there's some wiggle room with your departure times and dates, you could bag a cheap last-minute fare.
Is it cheaper to book a FSD to STT flight and hotel package?
You'll typically save money by booking a FSD to STT flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. After choosing your preferred accommodations and flights, consider adding extras like activities, car rentals and tours.
Can I cancel or change the date of my flight from Sioux Falls Regional Airport (FSD) to Cyril E. King Airport (STT)?
If you reserved your FSD to STT flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the fare type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you want more information.

Travel information

Origin airport
Sioux Falls Regional
Destination airport
Cyril E. King
Airlines serving
American Airlines, Delta, United
Roundtrip price
$509
Distance
2537 mi

Book with confidence

Sioux Falls to St. Thomas Flights

The cheapest times to fly from Sioux Falls to St. Thomas

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 Sioux Falls to St. Thomas are during the month of December. You can find some of the cheapest flights from Sioux Falls to St. Thomas with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Sioux Falls to St. Thomas

Sunday is one of the best days to book for cheap flights from Sioux Falls to St. Thomas: 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 Sioux Falls to St. Thomas

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 Sioux Falls to St. Thomas in 2025. You can also book with separate airlines for your outbound and return journeys, from $293 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 Sioux Falls to St. Thomas 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 Sioux Falls to St. Thomas 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.

 

Sioux Falls to St. Thomas Flights

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*Available to One Key members.