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$129+ Cheap flights from Sioux Falls to Seattle (FSD - SEA)

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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
FSD — SEA
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Sioux Falls Joe Foss Field to Seattle/Tacoma Intl are usually found in August or July, booked 29 days in advance, depart on a Tuesday or Saturday and return on a Saturday

Cheap flight deals from Sioux Falls to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Sioux Falls (FSD) to Seattle (SEA). 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 September 11, 2025.

Round-trip from

$198
(Frontier)

One-way from

$129
(Kiwi.com)

Popular in

March

Cheapest in

August

Average price

$425
From Sioux Falls Joe Foss Field to Seattle/Tacoma Intl
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One-way flight from Sioux Falls Joe Foss Field to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 10% potential increase in price ($53 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Sioux Falls to Seattle

Cheapest flights from Sioux Falls to Seattle
Explore the most affordable flight options available from Sioux Falls to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Frontier deal was found by Cheapflights users on 9/8. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/192:54 pmFSD - SEA
1 stop11h 36mFrontier
Mon 9/226:12 amSEA - FSD
1 stop5h 57mFrontier
Deal found 9/8$198
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/102:32 pmFSD - SEA
1 stop23h 41mFrontier
Thu 11/1312:58 pmSEA - FSD
1 stop22h 49mFrontier
Deal found 9/11$202
This Frontier deal was found by Cheapflights users on 9/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/192:54 pmFSD - SEA
1 stop11h 36mFrontier
Sun 9/216:12 amSEA - FSD
1 stop5h 57mFrontier
Deal found 9/9$211
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/163:19 pmFSD - SEA
1 stop18h 14mFrontier
Sun 10/198:43 pmSEA - FSD
1 stop19h 50mFrontier
Deal found 9/11$268
This American Airlines deal was found by Cheapflights users on 9/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/22:45 pmFSD - SEA
1 stop8h 23mAmerican Airlines
Tue 10/76:10 amSEA - FSD
1 stop8h 45mAmerican Airlines
Deal found 9/8$269
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/312:32 pmFSD - SEA
1 stop23h 41mFrontier
Sun 11/22:22 pmSEA - FSD
1 stop21h 25mFrontier
Deal found 9/9$270
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/311:47 pmFSD - SEA
2 stops11h 28mUnited Airlines
Sun 11/211:59 pmSEA - FSD
1 stop8h 43mUnited Airlines
Deal found 9/10$274
This Delta deal was found by Cheapflights users on 9/9. 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.
Fri 10/175:20 amFSD - SEA
1 stop7h 25mDelta
Mon 10/2011:55 pmSEA - FSD
1 stop8h 18mDelta
Deal found 9/9$294
This United Airlines deal was found by Cheapflights users on 9/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/198:57 amFSD - SEA
2 stops11h 28mUnited Airlines
Mon 11/243:48 pmSEA - FSD
1 stop5h 56mUnited Airlines
Deal found 9/9$299

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sioux Falls to Seattle 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 September 11, 2025.
Use the filters below to find and compare flights from Sioux Falls to Seattle that are best for you.

Fly from

Sioux Falls

Fly to

Seattle

Route

Depart

Return

Price

Sioux FallsSeattle

FSD - SEA

FSDSEA

Sioux Falls Joe Foss Field

Fri 9/19

2:54 pm-12:30 am

1 stop11h 36m

Seattle/Tacoma Intl

Mon 9/22

6:12 am-2:09 pm

1 stop5h 57m

$198

Sioux FallsSeattle

FSD - SEA

FSDSEA

Sioux Falls Joe Foss Field

Fri 9/19

2:54 pm-12:30 am

1 stop11h 36m

Seattle/Tacoma Intl

Sun 9/21

6:12 am-2:09 pm

1 stop5h 57m

$211

Sioux FallsSeattle

FSD - SEA

FSDSEA

Sioux Falls Joe Foss Field

Fri 10/31

6:00 am-10:35 am

1 stop6h 35m

Seattle/Tacoma Intl

Sun 11/2

11:59 pm-10:42 am

1 stop8h 43m

$269

Sioux FallsSeattle

FSD - SEA

FSDSEA

Sioux Falls Joe Foss Field

Sat 11/1

1:27 pm-9:48 pm

1 stop10h 21m

Seattle/Tacoma Intl

Wed 11/5

2:55 pm-11:31 pm

1 stop6h 36m

$269

Sioux FallsSeattle

FSD - SEA

FSDSEA

Sioux Falls Joe Foss Field

Wed 9/24

5:00 am-10:45 am

1 stop7h 45m

Seattle/Tacoma Intl

Tue 9/30

11:40 pm-10:07 am

1 stop8h 27m

$319

Sioux FallsSeattle

FSD - SEA

FSDSEA

Sioux Falls Joe Foss Field

Wed 9/24

9:16 am-3:52 pm

1 stop8h 36m

Seattle/Tacoma Intl

Sat 9/27

8:47 am-8:21 pm

2 stops9h 34m

$324

Sioux FallsSeattle

FSD - SEA

FSDSEA

Sioux Falls Joe Foss Field

Sat 11/1

6:49 am-12:40 pm

1 stop7h 51m

Seattle/Tacoma Intl

Sat 11/8

12:59 am-10:27 am

1 stop7h 28m

$324

Sioux FallsSeattle

FSD - SEA

FSDSEA

Sioux Falls Joe Foss Field

Wed 10/8

5:25 pm-12:27 am

1 stop9h 02m

Seattle/Tacoma Intl

Wed 10/15

5:22 am-4:35 pm

1 stop9h 13m

$329

Sioux FallsSeattle

FSD - SEA

FSDSEA

Sioux Falls Joe Foss Field

Tue 10/7

1:33 pm-9:48 pm

1 stop10h 15m

Seattle/Tacoma Intl

Mon 10/13

12:34 am-12:01 pm

1 stop9h 27m

$329

Sioux FallsSeattle

FSD - SEA

FSDSEA

Sioux Falls Joe Foss Field

Mon 9/22

2:54 pm-12:30 am

1 stop11h 36m

$163

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

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

Have a flexible travel schedule? Discover the best time to fly to Seattle from Sioux Falls 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 Sioux Falls to Seattle

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

Use this chart to determine the optimal time to book a round-trip flight from Sioux Falls to Seattle. Price data was last updated on August 29, 2025.

The price you pay for your flight from Sioux Falls to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 29 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 Sioux Falls to Seattle?

Currently, January is the cheapest month in which you can book a flight from Sioux Falls to Seattle (average of $238). Flying from Sioux Falls to Seattle in June is currently the most expensive (average of $388). 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 FSD to SEA?

Find hourly flight availability from Sioux Falls to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

It’s optimal to fly from Sioux Falls to Seattle at noon. By choosing this option you can save up to 12% on the cost of your flight, compared to a flight in the morning.

How much does it cost to fly round-trip from Sioux Falls to Seattle?

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated September 11, 2025.
Read through reviews of airlines operating flights from Sioux Falls to Seattle, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

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
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

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
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

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
7,960 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

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
3,177 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

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

  • How long is the flight from Sioux Falls to Seattle?

    There are many flights that can get you from Sioux Falls to Seattle in 6h 35m. Fly via Frontier, United Airlines, or American Airlines to get the fastest option. The distance between Sioux Falls and Seattle is about 1259 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Our cheapest airline available from Sioux Falls to Seattle is Frontier. Our recent data shows that you can find tickets from as low as $148 on this airline. Additional options worth looking into are Delta and American Airlines, starting at $208 and $268 round-trip. These flights start at 66% lower than the current average price 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Sioux Falls to Seattle 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 Sioux Falls to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Sioux Falls to Seattle (average of $238). Flying from Sioux Falls to Seattle in June is currently the most expensive (average of $388). 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Lacey
Renton
Olympia
Kent
Federal Way
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from Sioux Falls to Seattle

Discover the top 4 airlines that operate flights from Sioux Falls to Seattle. 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$148Average$270FlexibilityNo cancel feeOn-time62%
DeltaCheapest$208Average$438FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$268Average$439FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$312Average$585FlexibilityNo cancel feeOn-time69%

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