$232 Cheap Flights from Sioux Falls (FSD) to St. Thomas (STT)

View $232 flight on Tue, Mar 17, 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 $232 for one-way flights and $468 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sun, Apr 19 - Fri, Apr 24
FSD
Sioux Falls
STT
St. Thomas
$468 Roundtrip, just found
$468
Roundtrip
just found
Select American Airlines flight, departing Sun, Apr 19 from Sioux Falls to St. Thomas, returning Fri, Apr 24, priced at $468 just found
United
Sun, Apr 19 - Fri, Apr 24
FSD
Sioux Falls
STT
St. Thomas
$488 Roundtrip, just found
$488
Roundtrip
just found
Select United flight, departing Sun, Apr 19 from Sioux Falls to St. Thomas, returning Fri, Apr 24, priced at $488 just found
American Airlines
Wed, Dec 2 - Fri, Dec 11
FSD
Sioux Falls
STT
St. Thomas
$508 Roundtrip, just found
$508
Roundtrip
just found
Select American Airlines flight, departing Wed, Dec 2 from Sioux Falls to St. Thomas, returning Fri, Dec 11, priced at $508 just found
American Airlines
Mon, Jan 11 - Fri, Jan 15
FSD
Sioux Falls
STT
St. Thomas
$513 Roundtrip, found 2 hours ago
$513
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Mon, Jan 11 from Sioux Falls to St. Thomas, returning Fri, Jan 15, priced at $513 found 2 hours ago
American Airlines
Sat, Apr 11 - Fri, Apr 17
FSD
Sioux Falls
STT
St. Thomas
$513 Roundtrip, found 2 days ago
$513
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Apr 11 from Sioux Falls to St. Thomas, returning Fri, Apr 17, priced at $513 found 2 days ago
United
Sun, Apr 19 - Fri, Apr 24
FSD
Sioux Falls
STT
St. Thomas
$518 Roundtrip, just found
$518
Roundtrip
just found
Select United flight, departing Sun, Apr 19 from Sioux Falls to St. Thomas, returning Fri, Apr 24, priced at $518 just found
United
Sun, Apr 19 - Fri, Apr 24
FSD
Sioux Falls
STT
St. Thomas
$523 Roundtrip, just found
$523
Roundtrip
just found
Select United flight, departing Sun, Apr 19 from Sioux Falls to St. Thomas, returning Fri, Apr 24, priced at $523 just found
American Airlines
Sun, Apr 19 - Fri, Apr 24
FSD
Sioux Falls
STT
St. Thomas
$529 Roundtrip, just found
$529
Roundtrip
just found
Select American Airlines flight, departing Sun, Apr 19 from Sioux Falls to St. Thomas, returning Fri, Apr 24, priced at $529 just found
Delta
Mon, Apr 13 - Wed, Apr 29
FSD
Sioux Falls
STT
St. Thomas
$548 Roundtrip, just found
$548
Roundtrip
just found
Select Delta flight, departing Mon, Apr 13 from Sioux Falls to St. Thomas, returning Wed, Apr 29, priced at $548 just found
United
Sat, Apr 11 - Fri, Apr 17
FSD
Sioux Falls
STT
St. Thomas
$553 Roundtrip, found 2 days ago
$553
Roundtrip
found 2 days ago
Select United flight, departing Sat, Apr 11 from Sioux Falls to St. Thomas, returning Fri, Apr 17, priced at $553 found 2 days ago

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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 $634
STT
Cyril E. King
Cheapest
Flights from $634

Frequently asked questions

How much does a flight from Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King) cost?
You can find cheap one-way flights from $232 and cheap return flights from $468 Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King) with Expedia. One-way flights generally range between $462 and $1921, and roundtrip flights usually range from $681 to $3521. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King)?
The cheapest month to fly from FSD to STT is April when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King)?
Enter FSD to STT and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King)?
Delta is one of the cheapest airlines offering connecting flights from Sioux Falls, SD (FSD) to St. Thomas (STT), with round-trip tickets starting from around $534 with a layover in Minneapolis - St. Paul Intl. (MSP). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King)?
To find a cheap flight from Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King)?
The earliest flight from Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King) typically departs at around 5:00 AM, operated by Delta Airlines. This seasonal service is active in February, giving you a chance to start your day early in the beautiful Caribbean. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King)?
Flying from FSD to STT with a connection usually takes about 9 hours 20 minutes, traveling roughly 2,538 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King)?
First class seats are offered on the FSD to STT route with Delta Air Lines and United Airlines.
How do I earn miles on a Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King) flight with Expedia?
It's easy to earn miles on a Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for St. Thomas from Sioux Falls Regional (FSD)?
From Sioux Falls Regional (FSD), you can fly into Cyril E. King (STT) to reach St. Thomas. Some flights may connect through major hubs like O'Hare Intl. (ORD), Dallas-Fort Worth Intl. (DFW), Denver Intl. (DEN) before reaching St. Thomas. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King) at the last minute?
Typically, booking a last minute flight from Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King) flight and hotel package?
Securing a Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King) St Thomas Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King)?
If you booked your Sioux Falls, SD (FSD-Sioux Falls Regional) to St. Thomas (STT-Cyril E. King) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Sioux Falls Regional
Destination airport
Cyril E. King
Airlines serving
American Airlines, Delta, United
Roundtrip price
$468
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 April. 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 2026. You can also book with separate airlines for your outbound and return journeys, from $232 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

*Flight schedules are subject to change.

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*Available to One Key members.