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South Dakota

$141+ Cheap flights from Washington to South Dakota

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 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — FSD
Jul 19 — Jul 261
Sun 7/19
Sun 7/26
1 adult, Economy
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Cheap flight deals from Washington to South Dakota

Cheapest flights from Washington to South Dakota
Explore the most affordable flight options available from Washington to South Dakota. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 19, 2026.

This CheapOair deal was found by Cheapflights users on 6/18. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:06 pm
SEA
-
FSD
1 stop22h 55m
Frontier
Mon 8/318:56 pm
FSD
-
SEA
1 stop14h 23m
Frontier
Deal found 6/18$270
This CheapOair deal was found by Cheapflights users on 6/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/117:06 pm
SEA
-
FSD
1 stop22h 17m
Frontier
Fri 8/148:08 pm
FSD
-
SEA
1 stop14h 56m
Frontier
Deal found 6/17$275
This Delta deal was found by Cheapflights users on 6/15. 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.
Sat 9/53:00 pm
PDX
-
FSD
1 stop5h 51m
Delta
Sat 9/121:05 pm
FSD
-
PDX
1 stop6h 26m
Delta
Deal found 6/15$291
This Delta deal was found by Cheapflights users on 6/17. 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 10/277:00 am
GEG
-
RAP
1 stop5h 52m
Delta
Sat 10/316:55 am
RAP
-
GEG
1 stop5h 49m
Delta
Deal found 6/17$309
This American Airlines deal was found by Cheapflights users on 6/18. 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.
Sat 7/45:20 am
PDX
-
FSD
1 stop6h 23m
American Airlines
Sat 7/115:27 pm
FSD
-
PDX
1 stop7h 25m
American Airlines
Deal found 6/18$310
This CheapOair deal was found by Cheapflights users on 6/18. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/217:06 pm
SEA
-
FSD
1 stop22h 17m
Frontier
Fri 7/248:08 pm
FSD
-
SEA
1 stop15h 09m
Frontier
Deal found 6/18$310
This CheapOair deal was found by Cheapflights users on 6/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:41 pm
SEA
-
FSD
1 stop20h 55m
Frontier
Mon 10/57:31 pm
FSD
-
SEA
1 stop6h 56m
Frontier
Deal found 6/17$315
This Delta deal was found by Cheapflights users on 6/16. 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 8/283:00 pm
PDX
-
RAP
1 stop6h 37m
Delta
Wed 9/24:30 pm
RAP
-
PDX
1 stop7h 50m
Delta
Deal found 6/16$319
This Delta deal was found by Cheapflights users on 6/17. 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 8/2511:59 pm
SEA
-
RAP
1 stop9h 03m
Delta
Mon 8/3110:46 am
RAP
-
SEA
1 stop7h 14m
Delta
Deal found 6/17$319
This CheapOair deal was found by Cheapflights users on 6/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/237:41 pm
SEA
-
FSD
1 stop21h 38m
Frontier
Mon 6/298:14 pm
FSD
-
SEA
1 stop15h 34m
Frontier
Deal found 6/16$320
This United Airlines deal was found by Cheapflights users on 6/16. 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.
Thu 8/274:07 pm
PDX
-
RAP
1 stop5h 21m
United Airlines
Tue 9/111:22 am
RAP
-
PDX
2 stops7h 57m
United Airlines
Deal found 6/16$324
This United Airlines deal was found by Cheapflights users on 6/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2611:03 am
SEA
-
RAP
1 stop5h 50m
United Airlines
Sat 8/297:00 am
RAP
-
SEA
2 stops9h 29m
United Airlines
Deal found 6/15$324

Find flight deals from Washington to South Dakota

Keep the following information in mind while searching for Washington to South Dakota flight deals. Data was last updated June 19, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$270
(CheapOair)

One-way from

$141
(CheapOair)

Popular in

May

Cheapest in

November

Average price

$416
Provider with most accurate pricing for Seattle/Tacoma Intl-Sioux Falls Joe Foss Field flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Sioux Falls Joe Foss Field flights.
Search Deals
From Washington to South Dakota
Search Deals
One-way flight from Washington to South Dakota
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($137 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to South Dakota 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 June 19, 2026.
Use the filters below to find and compare flights from Washington to South Dakota that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SpokaneRapid City

GEG - RAP

GEGRAP

Spokane

Tue 10/27

2:05 pm-10:39 pm

1 stop7h 34m

Rapid City

Sat 10/31

11:30 am-6:48 pm

2 stops8h 18m

$314

PortlandSioux Falls

PDX - FSD

PDXFSD

Portland

Fri 7/31

3:31 pm-11:57 pm

1 stop6h 26m

Sioux Falls Joe Foss Field

Wed 8/5

8:30 am-1:52 pm

1 stop7h 22m

$329

SpokaneSioux Falls

GEG - FSD

GEGFSD

Spokane

Thu 8/20

2:05 pm-10:51 pm

1 stop6h 46m

Sioux Falls Joe Foss Field

Fri 9/25

8:23 am-12:53 pm

1 stop6h 30m

$344

SeattleSioux Falls

SEA - FSD

SEAFSD

Seattle/Tacoma Intl

Fri 10/23

1:56 pm-11:11 pm

1 stop7h 15m

Sioux Falls Joe Foss Field

Mon 10/26

5:05 pm-11:02 pm

1 stop7h 57m

$358

SeattleSioux Falls

SEA - FSD

SEAFSD

Seattle/Tacoma Intl

Fri 8/28

2:30 pm-10:51 pm

1 stop6h 21m

Sioux Falls Joe Foss Field

Mon 8/31

5:00 am-8:48 am

1 stop5h 48m

$364

SeattleSioux Falls

SEA - FSD

SEAFSD

Seattle/Tacoma Intl

Fri 9/18

2:30 pm-10:51 pm

1 stop6h 21m

Sioux Falls Joe Foss Field

Tue 9/22

4:20 pm-8:16 pm

1 stop5h 56m

$364

SpokaneSioux Falls

GEG - FSD

GEGFSD

Spokane

Fri 10/23

7:20 pm-10:05 am

2 stops12h 45m

Sioux Falls Joe Foss Field

Tue 11/10

10:58 am-9:05 pm

2 stops12h 07m

$371

PortlandSioux Falls

PDX - FSD

PDXFSD

Portland

Sat 9/5

11:02 pm-10:29 am

1 stop9h 27m

Sioux Falls Joe Foss Field

Sat 9/12

7:47 am-3:05 pm

2 stops9h 18m

$386

PortlandSioux Falls

PDX - FSD

PDXFSD

Portland

Wed 11/11

4:25 pm-11:43 pm

1 stop5h 18m

Sioux Falls Joe Foss Field

Sat 11/14

9:35 am-6:29 pm

2 stops10h 54m

$386

SpokaneRapid City

GEG - RAP

GEGRAP

Spokane

Tue 10/27

1:45 pm-8:33 pm

1 stop5h 48m

Rapid City

Sat 10/31

7:05 am-12:40 pm

1 stop6h 35m

$389

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/19

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Washington to South Dakota

Have a flexible travel schedule? Discover the best time to fly to South Dakota from Washington 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 Washington to South Dakota

What is the cheapest month to book a flight from State of Washington to South Dakota?

Currently, December is the cheapest month in which you can book a flight from State of Washington to South Dakota (average of $129). Flying from State of Washington to South Dakota in March is currently the most expensive (average of $278). 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.

How much does it cost to fly round-trip from State of Washington to South Dakota?

How far ahead should I book a flight from State of Washington to South Dakota?

Booking 45 days in advance of your planned departure date is, on average, the best time to get cheap flights from State of Washington to South Dakota. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing South Dakota

Get insights into the airlines that provide service to South Dakota. 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 South Dakota. Reviews last updated June 19, 2026.
Read through reviews of airlines operating flights from Washington to South Dakota, such as Delta,United Airlines, andAmerican Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,419 reviews

Food

7.2

Crew

8.5

Entertainment

7.8

Overall

7.8

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.8
Good
8,419 reviews
Delta
7.8
Good
8,419 reviews

Food

7.2

Crew

8.5

Entertainment

7.8

Overall

7.8

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
9,865 reviews
Delta
7.8
Good
8,419 reviews

Food

7.2

Crew

8.5

Entertainment

7.8

Overall

7.8

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
American Airlines
7.1
Good
11,709 reviews
Delta
7.8
Good
8,419 reviews

Food

7.2

Crew

8.5

Entertainment

7.8

Overall

7.8

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Frontier
5.6
Fair
2,879 reviews
Delta
7.8
Good
8,419 reviews

Food

7.2

Crew

8.5

Entertainment

7.8

Overall

7.8

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

Related info for your journey

Find useful and relevant information for your journey from Washington to South Dakota. 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 State of Washington to South Dakota?

    Delta, American Airlines, and United Airlines can get you from State of Washington to South Dakota in just under 6h 26m. Your travel time can differ by up to 1h 08m. The distance between State of Washington and South Dakota is about 1273 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Washington to South Dakota that include hotel bookings?

    Yes. In addition to deals on Washington to South Dakota flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to South Dakota?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to South Dakota.

  • Can I find deals for business class flights from Washington to South Dakota?

    Yes. Cheapflights offers flight deals from Washington to South Dakota 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 State of Washington to South Dakota?

    Currently, December is the cheapest month in which you can book a flight from State of Washington to South Dakota (average of $129). Flying from State of Washington to South Dakota in March is currently the most expensive (average of $278). 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

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Alternative routes for Washington to South Dakota

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Washington to South Dakota

Discover the top 4 airlines that operate flights from Washington to South Dakota. 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 June 19, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$188Average$379FlexibilityNo cancel feeOn-time62%
DeltaCheapest$190Average$382FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$268Average$408FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$269Average$457FlexibilityNo cancel feeOn-time69%

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