$103 Cheap Flights from Sioux Falls (FSD) to Seattle (SEA)

View $103 flight on Sun, Nov 9, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $103 for one-way flights and $192 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Mon, Nov 3 - Wed, Nov 12
FSD
Sioux Falls
SEA
Seattle
$192 Roundtrip, found 19 hours ago
$192
Roundtrip
found 19 hours ago
Select Frontier Airlines flight, departing Mon, Nov 3 from Sioux Falls to Seattle, returning Wed, Nov 12, priced at $192 found 19 hours ago
Frontier Airlines
Fri, Nov 7 - Wed, Nov 12
FSD
Sioux Falls
SEA
Seattle
$212 Roundtrip, found 20 hours ago
$212
Roundtrip
found 20 hours ago
Select Frontier Airlines flight, departing Fri, Nov 7 from Sioux Falls to Seattle, returning Wed, Nov 12, priced at $212 found 20 hours ago
Frontier Airlines
Mon, Nov 3 - Wed, Nov 5
FSD
Sioux Falls
SEA
Seattle
$218 Roundtrip, found 12 hours ago
$218
Roundtrip
found 12 hours ago
Select Frontier Airlines flight, departing Mon, Nov 3 from Sioux Falls to Seattle, returning Wed, Nov 5, priced at $218 found 12 hours ago
Frontier Airlines
Mon, Nov 3 - Thu, Nov 6
FSD
Sioux Falls
SEA
Seattle
$221 Roundtrip, found 19 hours ago
$221
Roundtrip
found 19 hours ago
Select Frontier Airlines flight, departing Mon, Nov 3 from Sioux Falls to Seattle, returning Thu, Nov 6, priced at $221 found 19 hours ago
Frontier Airlines
Thu, Oct 30 - Sat, Nov 8
FSD
Sioux Falls
SEA
Seattle
$232 Roundtrip, found 4 days ago
$232
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Thu, Oct 30 from Sioux Falls to Seattle, returning Sat, Nov 8, priced at $232 found 4 days ago
Frontier Airlines
Mon, Nov 10 - Thu, Nov 13
FSD
Sioux Falls
SEA
Seattle
$236 Roundtrip, found 20 hours ago
$236
Roundtrip
found 20 hours ago
Select Frontier Airlines flight, departing Mon, Nov 10 from Sioux Falls to Seattle, returning Thu, Nov 13, priced at $236 found 20 hours ago
Frontier Airlines
Thu, Oct 23 - Wed, Nov 5
FSD
Sioux Falls
SEA
Seattle
$241 Roundtrip, found 2 hours ago
$241
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Thu, Oct 23 from Sioux Falls to Seattle, returning Wed, Nov 5, priced at $241 found 2 hours ago
American Airlines
Fri, Nov 14 - Sat, Nov 15
FSD
Sioux Falls
SEA
Seattle
$263 Roundtrip, found 1 day ago
$263
Roundtrip
found 1 day ago
Select American Airlines flight, departing Fri, Nov 14 from Sioux Falls to Seattle, returning Sat, Nov 15, priced at $263 found 1 day ago
United
Fri, Feb 6 - Mon, Feb 9
FSD
Sioux Falls
SEA
Seattle
$269 Roundtrip, found 7 hours ago
$269
Roundtrip
found 7 hours ago
Select United flight, departing Fri, Feb 6 from Sioux Falls to Seattle, returning Mon, Feb 9, priced at $269 found 7 hours ago
Alaska Airlines
Fri, Jan 30 - Mon, Feb 2
FSD
Sioux Falls
SEA
Seattle
$349 Roundtrip, found 5 hours ago
$349
Roundtrip
found 5 hours ago
Select Alaska Airlines flight, departing Fri, Jan 30 from Sioux Falls to Seattle, returning Mon, Feb 2, priced at $349 found 5 hours ago

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

September is typically the cheapest month to fly

From $188 - $547 per traveler.

Alternative airports near Seattle

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

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $294
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $294

Frequently asked questions

How much does a flight from Sioux Falls Regional Airport (FSD) to Seattle - Tacoma Intl. Airport (SEA) cost?
Grab a cheap one-way flight from $103 or cheap return flight from $192 from Sioux Falls Regional Airport (FSD) to Seattle - Tacoma Intl. Airport (SEA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Sioux Falls Regional Airport (FSD) to Seattle - Tacoma Intl. Airport (SEA)?
Flying in November can help you save, as it's the cheapest month for flights between FSD and SEA. You'll often find the lowest fares during the off-season.
What is the cheapest airline that flies from Sioux Falls Regional Airport (FSD) to Seattle - Tacoma Intl. Airport (SEA)?
To find the cheapest airline flying from FSD to SEA, use Expedia's filter tool. Tailor your search based on what matters most to you, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Sioux Falls Regional Airport (FSD) to Seattle - Tacoma Intl. Airport (SEA)?
There are no daily nonstop flights from Sioux Falls Regional Airport (FSD) to Seattle - Tacoma Intl. Airport (SEA). But you can opt for flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be cruising above the clouds in no time.
What day of the week has the most flights from FSD to SEA?
You'll usually find Tuesday the quietest day for flights, while Fridays are often 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 Sioux Falls Regional Airport (FSD) to Seattle - Tacoma Intl. Airport (SEA)?
To avoid possible delays on the Sioux Falls Regional Airport (FSD) to Seattle - Tacoma Intl. Airport (SEA) route, aim to travel before 3 PM. Later departures are 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 Seattle - Tacoma Intl. Airport (SEA) last-minute?
Waiting until just before your departure to book your flight from FSD to SEA generally means paying more. While it's possible to find some last-minute offers, they aren't always guaranteed. Keep your travel schedule open to boost your chances of snagging a bargain.
Is it cheaper to book a FSD to SEA flight and hotel package?
You'll typically save money by booking a FSD to SEA 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 everything in one convenient place. Once you've chosen your preferred flights and accommodations, consider adding extras such as car rentals, tours and activities.
Can I cancel or change the date of my flight from Sioux Falls Regional Airport (FSD) to Seattle - Tacoma Intl. Airport (SEA)?
In most instances, you're able to cancel or reschedule your FSD to SEA flight. However, additional charges may apply, especially if you booked over 24 hours ago. Check your itinerary for the airline's rules and fees on flight changes, or if you want more information, visit our Customer Service portal.

Travel information

Origin airport
Sioux Falls Regional
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, United
Roundtrip price
$192
Distance
1260 mi

Book with confidence

Sioux Falls to Seattle Flights

The cheapest times to fly from Sioux Falls to Seattle

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

 

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

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

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 Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $103 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 Seattle 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 Seattle 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 Seattle Flights

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*Available to One Key members.