$172 Cheap Flights from Seattle (SEA) to Sioux Falls (FSD)

View $172 flight on Thu, Oct 30, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Sioux Falls Regional Airport (FSD)

Cheap Flights from Seattle to Sioux Falls (SEA-FSD)

Prices were available within the past 7 days and start at $172 for one-way flights and $140 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Nov 13 - Mon, Nov 17
SEA
Seattle
FSD
Sioux Falls
$140 Roundtrip, found 14 hours ago
$140
Roundtrip
found 14 hours ago
Select Frontier Airlines flight, departing Thu, Nov 13 from Seattle to Sioux Falls, returning Mon, Nov 17, priced at $140 found 14 hours ago
Frontier Airlines
Wed, Nov 12 - Mon, Nov 17
SEA
Seattle
FSD
Sioux Falls
$160 Roundtrip, found 14 hours ago
$160
Roundtrip
found 14 hours ago
Select Frontier Airlines flight, departing Wed, Nov 12 from Seattle to Sioux Falls, returning Mon, Nov 17, priced at $160 found 14 hours ago
Frontier Airlines
Thu, Nov 13 - Sun, Nov 16
SEA
Seattle
FSD
Sioux Falls
$172 Roundtrip, found 14 hours ago
$172
Roundtrip
found 14 hours ago
Select Frontier Airlines flight, departing Thu, Nov 13 from Seattle to Sioux Falls, returning Sun, Nov 16, priced at $172 found 14 hours ago
Frontier Airlines
Sat, Nov 15 - Mon, Nov 17
SEA
Seattle
FSD
Sioux Falls
$186 Roundtrip, found 14 hours ago
$186
Roundtrip
found 14 hours ago
Select Frontier Airlines flight, departing Sat, Nov 15 from Seattle to Sioux Falls, returning Mon, Nov 17, priced at $186 found 14 hours ago
Frontier Airlines
Wed, Nov 12 - Fri, Nov 14
SEA
Seattle
FSD
Sioux Falls
$192 Roundtrip, found 1 day ago
$192
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Nov 12 from Seattle to Sioux Falls, returning Fri, Nov 14, priced at $192 found 1 day ago
Frontier Airlines
Sun, Nov 9 - Sun, Nov 16
SEA
Seattle
FSD
Sioux Falls
$204 Roundtrip, found 19 hours ago
$204
Roundtrip
found 19 hours ago
Select Frontier Airlines flight, departing Sun, Nov 9 from Seattle to Sioux Falls, returning Sun, Nov 16, priced at $204 found 19 hours ago
United
Sat, Jan 31 - Sun, Feb 1
SEA
Seattle
FSD
Sioux Falls
$264 Roundtrip, found 3 days ago
$264
Roundtrip
found 3 days ago
Select United flight, departing Sat, Jan 31 from Seattle to Sioux Falls, returning Sun, Feb 1, priced at $264 found 3 days ago
American Airlines
Wed, Dec 3 - Sun, Dec 7
SEA
Seattle
FSD
Sioux Falls
$269 Roundtrip, found 4 hours ago
$269
Roundtrip
found 4 hours ago
Select American Airlines flight, departing Wed, Dec 3 from Seattle to Sioux Falls, returning Sun, Dec 7, priced at $269 found 4 hours ago
Delta
Wed, Dec 3 - Sun, Dec 7
SEA
Seattle
FSD
Sioux Falls
$269 Roundtrip, found 4 hours ago
$269
Roundtrip
found 4 hours ago
Select Delta flight, departing Wed, Dec 3 from Seattle to Sioux Falls, returning Sun, Dec 7, priced at $269 found 4 hours ago
Alaska Airlines
Tue, Dec 30 - Tue, Jan 6
SEA
Seattle
FSD
Sioux Falls
$349 Roundtrip, found 3 days ago
$349
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Tue, Dec 30 from Seattle to Sioux Falls, returning Tue, Jan 6, priced at $349 found 3 days ago

Find the cheapest month to fly from Seattle (SEA) to Sioux Falls (FSD)

May is typically the cheapest month to fly

From $208 - $607 per traveler.

Alternative airports near Sioux Falls

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

Select flight to Sioux Falls Regional FSD. Cheapest and Closest option available. Average driving time to city center is 6 minutes. Flights from $304
FSD
Sioux Falls Regional
CheapestClosest
Average driving time to city center6 min
Flights from $304

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Sioux Falls Regional Airport (FSD) cost?
Secure a cheap one-way flight from $172 or cheap return flight from $140 from Seattle - Tacoma Intl. Airport (SEA) to Sioux Falls Regional Airport (FSD) 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 Seattle - Tacoma Intl. Airport (SEA) to Sioux Falls Regional Airport (FSD)?
Planning your getaway for November can help you save, as it's the cheapest month for flights between SEA and FSD. You'll typically find the lowest prices during the off-season.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Sioux Falls Regional Airport (FSD)?
To find the cheapest airline flying from SEA to FSD, use Expedia's filter tool. Customize your search based on your travel needs, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Sioux Falls Regional Airport (FSD)?
Direct flights from Seattle - Tacoma Intl. Airport (SEA) to Sioux Falls Regional Airport (FSD) 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 SEA to FSD?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary 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 Seattle - Tacoma Intl. Airport (SEA) to Sioux Falls Regional Airport (FSD)?
To avoid possible delays on the Seattle - Tacoma Intl. Airport (SEA) to Sioux Falls Regional Airport (FSD) route, aim to fly before 3 PM. Departures after this hour 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 Seattle - Tacoma Intl. Airport (SEA) to Sioux Falls Regional Airport (FSD) last-minute?
Booking your plane ticket from SEA to FSD right before your journey is generally more expensive. However, if you're flexible with your travel times and dates, you could grab a cheap last-minute fare.
Is it cheaper to book a SEA to FSD flight and hotel package?
Booking a SEA to FSD flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Choose from our wide range of hotels and then add activities, flights 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 Seattle - Tacoma Intl. Airport (SEA) to Sioux Falls Regional Airport (FSD)?
If you booked your SEA to FSD flight within the last 24 hours, you may be able to modify or cancel it without 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 want more information.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Sioux Falls Regional
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, United
Roundtrip price
$140
Distance
1260 mi

Book with confidence

Seattle to Sioux Falls Flights

The cheapest times to fly from Seattle to Sioux Falls

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

 

The best time to book a flight from Seattle to Sioux Falls

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

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 Seattle to Sioux Falls in 2025. You can also book with separate airlines for your outbound and return journeys, from $172 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 Seattle to Sioux Falls 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 Seattle to Sioux Falls 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.

 

Seattle to Sioux Falls Flights

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*Available to One Key members.