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$75+ Cheap flights from Seattle to Sioux Falls (SEA - FSD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — FSD
Aug 21 — Aug 281
Thu 8/21
Thu 8/28
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Sioux Falls Joe Foss Field are usually found in January or June, booked 54 days in advance, depart on a Saturday or Tuesday and return on a Tuesday

Cheap flight deals from Seattle to Sioux Falls

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Sioux Falls (FSD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 16, 2025.

Round-trip from

$184
(Expedia)

One-way from

$75
(Priceline)

Popular in

December

Cheapest in

January

Average price

$439
From Seattle/Tacoma Intl to Sioux Falls Joe Foss Field
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One-way flight from Seattle/Tacoma Intl to Sioux Falls Joe Foss Field
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Highest demand for flights based on searches. 5% potential increase in price ($26 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Seattle to Sioux Falls

Cheapest flights from Seattle to Sioux Falls
Explore the most affordable flight options available from Seattle to Sioux Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 16, 2025.

This Expedia deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/276:41 amSEA - FSD
1 stop5h 31mFrontier
Sun 9/72:54 pmFSD - SEA
1 stop11h 36mFrontier
Deal found 8/15$184
This Orbitz deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/226:12 amSEA - FSD
1 stop5h 57mFrontier
Mon 9/292:54 pmFSD - SEA
1 stop11h 36mFrontier
Deal found 8/15$210
This FlightHub deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/56:12 amSEA - FSD
1 stop5h 57mFrontier
Mon 9/82:54 pmFSD - SEA
1 stop11h 36mFrontier
Deal found 8/15$226
This Priceline deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/186:25 amSEA - FSD
1 stop10h 12mFrontier
Wed 8/203:07 pmFSD - SEA
1 stop9h 54mFrontier
Deal found 8/14$265
This Delta deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/276:00 amSEA - FSD
1 stop7h 26mDelta
Tue 9/3010:48 amFSD - SEA
1 stop7h 41mDelta
Deal found 8/13$269
This FlightHub deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/28:31 pmSEA - FSD
2 stops15h 38mFrontier
Mon 10/62:54 pmFSD - SEA
1 stop23h 13mFrontier
Deal found 8/14$271
This Orbitz deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/186:25 amSEA - FSD
1 stop10h 12mFrontier
Sun 8/242:08 pmFSD - SEA
1 stop12h 26mFrontier
Deal found 8/14$285
This Delta deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/311:55 pmSEA - FSD
1 stop8h 24mDelta
Sun 9/75:00 amFSD - SEA
1 stop5h 48mDelta
Deal found 8/15$294
This Delta deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/211:55 pmSEA - FSD
1 stop8h 24mDelta
Sun 9/75:00 amFSD - SEA
1 stop5h 48mDelta
Deal found 8/15$324

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Sioux Falls that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 16, 2025.
Use the filters below to find and compare flights from Seattle to Sioux Falls that are best for you.

Fly from

Seattle

Fly to

Sioux Falls

Route

Depart

Return

Price

SeattleSioux Falls

SEA - FSD

SEAFSD

Seattle/Tacoma Intl

Wed 8/27

6:41 am-2:12 pm

1 stop5h 31m

Sioux Falls Joe Foss Field

Sun 9/7

2:54 pm-12:30 am

1 stop11h 36m

$184

SeattleSioux Falls

SEA - FSD

SEAFSD

Seattle/Tacoma Intl

Mon 9/22

6:12 am-2:09 pm

1 stop5h 57m

Sioux Falls Joe Foss Field

Mon 9/29

2:54 pm-12:30 am

1 stop11h 36m

$210

SeattleSioux Falls

SEA - FSD

SEAFSD

Seattle/Tacoma Intl

Fri 9/5

6:12 am-2:09 pm

1 stop5h 57m

Sioux Falls Joe Foss Field

Mon 9/8

2:54 pm-12:30 am

1 stop11h 36m

$226

SeattleSioux Falls

SEA - FSD

SEAFSD

Seattle/Tacoma Intl

Thu 10/2

3:00 pm-11:59 pm

1 stop6h 59m

Sioux Falls Joe Foss Field

Mon 10/6

5:07 pm-10:59 pm

1 stop7h 52m

$269

SeattleSioux Falls

SEA - FSD

SEAFSD

Seattle/Tacoma Intl

Sat 9/27

6:00 am-3:26 pm

1 stop7h 26m

Sioux Falls Joe Foss Field

Tue 9/30

10:48 am-4:29 pm

1 stop7h 41m

$269

SeattleSioux Falls

SEA - FSD

SEAFSD

Seattle/Tacoma Intl

Thu 10/2

8:31 pm-2:09 pm

2 stops15h 38m

Sioux Falls Joe Foss Field

Mon 10/6

2:54 pm-12:07 pm

1 stop23h 13m

$271

SeattleSioux Falls

SEA - FSD

SEAFSD

Seattle/Tacoma Intl

Wed 9/3

11:55 pm-10:19 am

1 stop8h 24m

Sioux Falls Joe Foss Field

Sun 9/7

5:00 am-8:48 am

1 stop5h 48m

$294

SeattleSioux Falls

SEA - FSD

SEAFSD

Seattle/Tacoma Intl

Tue 9/2

11:55 pm-10:19 am

1 stop8h 24m

Sioux Falls Joe Foss Field

Sun 9/7

5:00 am-8:48 am

1 stop5h 48m

$324

SeattleSioux Falls

SEA - FSD

SEAFSD

Seattle/Tacoma Intl

Wed 9/17

5:26 am-5:03 pm

1 stop9h 37m

Sioux Falls Joe Foss Field

Wed 10/1

1:19 pm-7:09 pm

1 stop7h 50m

$329

SeattleSioux Falls

SEA - FSD

SEAFSD

Seattle/Tacoma Intl

Sun 9/21

6:12 am-2:09 pm

1 stop5h 57m

$75

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 18 results
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Best time to book a flight from Seattle to Sioux Falls

Have a flexible travel schedule? Discover the best time to fly to Sioux Falls from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Sioux Falls

How far ahead should I book a flight from Seattle to Sioux Falls?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Sioux Falls. Price data was last updated on August 8, 2025.

The price you pay for your flight from Seattle to Sioux Falls may vary depending on when you book. For the best chance of a lower fare, look to book 53 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Seattle to Sioux Falls?

Currently, September is the cheapest month in which you can book a flight from Seattle to Sioux Falls (average of $334). Flying from Seattle to Sioux Falls in December is currently the most expensive (average of $446). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to FSD?

Find hourly flight availability from Seattle to Sioux Falls. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 16, 2025.

It’s typically best to fly out from Seattle to Sioux Falls in the evening. Doing so could potentially save you 55% on the flight price compared to flying in the afternoon, which is usually more expensive.

Reviews of airlines servicing Sioux Falls

Get insights into the airlines that provide service to Sioux Falls. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sioux Falls. Reviews last updated August 16, 2025.
See what other customers who have flown with Delta, United Airlines, and American Airlines from Seattle to Sioux Falls have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,985 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,985 reviews
Delta
8.0
Very good
7,985 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,916 reviews
Delta
8.0
Very good
7,985 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,985 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Frontier
5.8
Fair
3,211 reviews
Delta
8.0
Very good
7,985 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Seattle to Sioux Falls. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Seattle to Sioux Falls round-trip?

    Currently priced at $128, Frontier will fly you from Seattle to Sioux Falls and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and American Airlines - these airlines can fly you to your destination from $268 and $268, respectively. Users have found that Frontier is 73% cheaper than the other options available to this destination.

  • Can I find deals for flights from Seattle to Sioux Falls that include hotel bookings?

    Yes. In addition to deals on Seattle to Sioux Falls flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Sioux Falls?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Sioux Falls.

  • Can I find deals for business class flights from Seattle to Sioux Falls?

    Yes. Cheapflights offers flight deals from Seattle to Sioux Falls by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Sioux Falls?

    Currently, September is the cheapest month in which you can book a flight from Seattle to Sioux Falls (average of $334). Flying from Seattle to Sioux Falls in December is currently the most expensive (average of $446). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from Seattle to Sioux Falls

Discover the top 4 airlines that operate flights from Seattle to Sioux Falls. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$128Average$351FlexibilityNo cancel feeOn-time62%
DeltaCheapest$268Average$458FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$268Average$418FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$348Average$600FlexibilityNo cancel feeOn-time69%

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