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South Dakota

$124+ 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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — FSD
Sep 3 — Sep 101
Thu 9/3
Thu 9/10
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 August 4, 2026.

This CheapOair deal was found by Cheapflights users on 7/30. 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.
Fri 10/212:38 pm
PDX
-
FSD
1 stop5h 29m
Frontier
Sat 10/177:31 pm
FSD
-
PDX
1 stop23h 04m
Frontier
Deal found 7/30$231
This Kiwi.com deal was found by Cheapflights users on 7/31. 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.
Wed 9/99:45 pm
SEA
-
RAP
1 stop13h 01m
Multiple Airlines
Sun 9/133:34 pm
RAP
-
SEA
1 stop19h 08m
Multiple Airlines
Deal found 7/31$240
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Wed 9/28:48 pm
SEA
-
RAP
1 stop13h 58m
Multiple Airlines
Thu 9/1012:36 pm
RAP
-
SEA
1 stop22h 06m
Multiple Airlines
Deal found 7/30$245
This CheapOair deal was found by Cheapflights users on 7/31. 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.
Fri 8/2812:20 pm
PDX
-
FSD
1 stop5h 41m
Frontier
Fri 9/48:56 pm
FSD
-
PDX
1 stop22h 15m
Frontier
Deal found 7/31$250
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Wed 9/28:48 pm
SEA
-
RAP
1 stop13h 58m
Multiple Airlines
Sun 9/133:34 pm
RAP
-
SEA
1 stop27h 54m
Multiple Airlines
Deal found 7/30$265
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 10/229:34 pm
PDX
-
FSD
1 stop11h 42m
Multiple Airlines
Sun 10/251:56 pm
FSD
-
PDX
1 stop8h 43m
Multiple Airlines
Deal found 7/30$268
This CheapOair deal was found by Cheapflights users on 7/31. 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.
Fri 10/212:38 pm
PDX
-
FSD
1 stop5h 29m
Frontier
Sat 10/107:31 pm
FSD
-
PDX
1 stop23h 04m
Frontier
Deal found 7/31$271
This CheapOair deal was found by Cheapflights users on 7/30. 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.
Fri 9/412:20 pm
PDX
-
FSD
1 stop5h 41m
Frontier
Mon 9/78:56 pm
FSD
-
PDX
1 stop22h 15m
Frontier
Deal found 7/30$272
This CheapOair deal was found by Cheapflights users on 8/1. 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 10/1512:34 pm
PDX
-
FSD
1 stop28h 02m
Frontier
Sat 10/247:31 pm
FSD
-
PDX
1 stop23h 04m
Frontier
Deal found 8/1$274
This Kiwi.com deal was found by Cheapflights users on 8/3. 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.
Sat 11/79:16 pm
SEA
-
FSD
1 stop14h 12m
Multiple Airlines
Fri 11/138:48 pm
FSD
-
SEA
1 stop15h 03m
Multiple Airlines
Deal found 8/3$277
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
Sat 9/59:36 pm
SEA
-
RAP
1 stop16h 08m
Multiple Airlines
Thu 9/1012:36 pm
RAP
-
SEA
1 stop22h 06m
Multiple Airlines
Deal found 7/29$287
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 10/159:34 pm
PDX
-
FSD
1 stop11h 26m
Multiple Airlines
Sun 10/1812:26 pm
FSD
-
PDX
2 stops25h 13m
Multiple Airlines
Deal found 7/31$300

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 August 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$231
(CheapOair)

One-way from

$124
(Kiwi.com)

Popular in

May

Cheapest in

November

Average price

$473
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 ($154 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 August 4, 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

PortlandSioux Falls

PDX - FSD

PDXFSD

Portland

Sat 9/5

3:00 pm-10:51 pm

1 stop5h 51m

Sioux Falls Joe Foss Field

Sat 9/12

1:05 pm-5:31 pm

1 stop6h 26m

$301

PortlandSioux Falls

PDX - FSD

PDXFSD

Portland

Sat 10/3

10:43 am-11:11 pm

2 stops10h 28m

Sioux Falls Joe Foss Field

Sat 10/10

1:46 pm-5:46 pm

1 stop6h 00m

$306

PortlandSioux Falls

PDX - FSD

PDXFSD

Portland

Sat 9/5

4:07 pm-11:44 pm

1 stop5h 37m

Sioux Falls Joe Foss Field

Sat 9/12

9:35 am-6:25 pm

2 stops10h 50m

$306

PortlandSioux Falls

PDX - FSD

PDXFSD

Portland

Tue 8/25

12:35 am-10:20 am

1 stop7h 45m

Sioux Falls Joe Foss Field

Sat 8/29

4:28 pm-8:17 pm

1 stop5h 49m

$320

PortlandSioux Falls

PDX - FSD

PDXFSD

Portland

Wed 9/23

2:27 pm-11:12 pm

1 stop6h 45m

Sioux Falls Joe Foss Field

Sun 9/27

6:00 am-9:36 am

1 stop5h 36m

$320

PortlandSioux Falls

PDX - FSD

PDXFSD

Portland

Tue 9/1

9:00 am-8:07 pm

2 stops9h 07m

Sioux Falls Joe Foss Field

Mon 9/7

6:00 am-9:32 am

1 stop5h 32m

$325

PortlandRapid City

PDX - RAP

PDXRAP

Portland

Thu 9/10

5:00 am-11:55 am

1 stop5h 55m

Rapid City

Thu 9/17

5:48 pm-10:53 pm

1 stop6h 05m

$329
Quickest round-trip

SpokaneSioux Falls

GEG - FSD

GEGFSD

Spokane

Wed 9/9

3:54 pm-11:44 pm

1 stop5h 50m

Sioux Falls Joe Foss Field

Sat 9/12

9:35 am-12:35 pm

1 stop5h 00m

$329

SpokaneSioux Falls

GEG - FSD

GEGFSD

Spokane

Wed 9/9

3:54 pm-11:44 pm

1 stop5h 50m

Sioux Falls Joe Foss Field

Sat 10/10

5:04 pm-8:49 pm

1 stop5h 45m

$329

SpokaneSioux Falls

GEG - FSD

GEGFSD

Spokane

Thu 9/10

2:05 pm-10:51 pm

1 stop6h 46m

Sioux Falls Joe Foss Field

Sat 9/12

10:40 am-9:11 pm

2 stops12h 31m

$334

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/1

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, November is the cheapest month in which you can book a flight from State of Washington to South Dakota (average of $353). Flying from State of Washington to South Dakota in June is currently the most expensive (average of $592). 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?

Airfare is below average for this route at the moment.
State of Washington to South Dakota flights typically cost between $353 and $586 in November.
The cheapest round-trip price found within the last 5 days was $277 on Multiple Airlines (Nov 7-Nov 13).

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

Booking 75 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 August 4, 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
8,483 reviews

Crew

8.5

Entertainment

7.8

Comfort

7.8

Food

7.2

Overall

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
8,483 reviews
Delta
7.8
Good
8,483 reviews

Crew

8.5

Entertainment

7.8

Comfort

7.8

Food

7.2

Overall

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
10,059 reviews
Delta
7.8
Good
8,483 reviews

Crew

8.5

Entertainment

7.8

Comfort

7.8

Food

7.2

Overall

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
11,845 reviews
Delta
7.8
Good
8,483 reviews

Crew

8.5

Entertainment

7.8

Comfort

7.8

Food

7.2

Overall

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 and United Airlines can get you from State of Washington to South Dakota in just under 5h 51m. Your travel time can differ by up to 4h 37m. 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, November is the cheapest month in which you can book a flight from State of Washington to South Dakota (average of $353). Flying from State of Washington to South Dakota in June is currently the most expensive (average of $592). 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.

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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 3 airlines flying from Washington to South Dakota

Discover the top 3 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 August 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$190Average$433FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$268Average$423FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$278Average$472FlexibilityNo cancel feeOn-time69%

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