$268 Cheap Flights from Sioux Falls (FSD) to Rock Springs (RKS)

View $268 flight on Wed, Nov 12, 2025Opens in a new window

Popular airlines from Sioux Falls Regional Airport (FSD) to Rock Springs, WY (RKS-Sweetwater County)

Cheap Flights from Sioux Falls to Rock Springs (FSD-RKS)

Prices were available within the past 7 days and start at $268 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 Sioux Falls Regional Airport (FSD) to Sweetwater County Airport (RKS) cost?
Secure a cheap one-way flight from $268 or cheap return flight from Sioux Falls Regional Airport (FSD) to Sweetwater County Airport (RKS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Sioux Falls Regional Airport (FSD) to Sweetwater County Airport (RKS)?
Planning your trip for may help you find better deals, as it's the cheapest month for flights between FSD and RKS. You'll often find the lowest prices during the off-season.
What is the cheapest airline that flies from Sioux Falls Regional Airport (FSD) to Sweetwater County Airport (RKS)?
Expedia's filter tool lets you easily compare different airlines, travel time and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest FSD to RKS flight.
How many flights per day from Sioux Falls Regional Airport (FSD) to Sweetwater County Airport (RKS)?
You'll need to hop on a flight with a layover when traveling from Sioux Falls Regional Airport (FSD) to Sweetwater County Airport (RKS). Direct flights don't operate daily on this route. However, simply filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from FSD to RKS?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can vary depending on a number of factors, including the time of year 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 Sioux Falls Regional Airport (FSD) to Sweetwater County Airport (RKS)?
Choose a flight from Sioux Falls Regional Airport (FSD) to Sweetwater County Airport (RKS) that leaves before 3 PM to reduce the risk of cancellations and 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 Sioux Falls Regional Airport (FSD) to Sweetwater County Airport (RKS) last-minute?
Last-minute bookings from FSD to RKS are typically more expensive. For the lowest prices, start looking for flights well ahead of time. That said, if your travel plans are flexible, it's possible to land a cheap fare right before you leave.
Is it cheaper to book a FSD to RKS flight and hotel package?
You'll generally save money by securing a FSD to RKS 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 ideal flights and accommodations, consider other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Sioux Falls Regional Airport (FSD) to Sweetwater County Airport (RKS)?
If you booked your FSD to RKS flight within the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of fare 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

Travel information

Origin airport
Sioux Falls Regional
Destination airport
Sweetwater County
Distance
641 mi

Book with confidence

Book with confidence

Sioux Falls to Rock Springs Flights

The cheapest times to fly from Sioux Falls to Rock Springs

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

 

The best time to book a flight from Sioux Falls to Rock Springs

Sunday is one of the best days to book for cheap flights from Sioux Falls to Rock Springs: 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 Rock Springs

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 Rock Springs in 2025. You can also book with separate airlines for your outbound and return journeys, from $268 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 Rock Springs 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 Rock Springs 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 Rock Springs Flights

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*Available to One Key members.