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South Dakota

$120+ 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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — FSD
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find 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 October 30, 2025.

This Mytrip deal was found by Cheapflights users on 10/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1312:58 pmSEA - FSD
1 stop22h 44mFrontier
Mon 11/172:32 pmFSD - SEA
1 stop23h 35mFrontier
Deal found 10/29$139
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1312:52 pmPDX - FSD
1 stop22h 50mFrontier
Mon 11/172:32 pmFSD - PDX
1 stop23h 24mFrontier
Deal found 10/28$159
This United Airlines deal was found by Cheapflights users on 10/28. 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.
Tue 12/95:25 amGEG - RAP
1 stop5h 01mUnited Airlines
Tue 12/162:55 pmRAP - GEG
1 stop7h 04mUnited Airlines
Deal found 10/28$249
This Delta deal was found by Cheapflights users on 10/28. 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 12/96:00 amGEG - RAP
1 stop8h 45mDelta
Tue 12/162:51 pmRAP - GEG
2 stops10h 08mDelta
Deal found 10/28$254
This Delta deal was found by Cheapflights users on 10/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/41:12 pmGEG - FSD
1 stop8h 02mDelta
Tue 12/98:01 amFSD - GEG
1 stop7h 17mDelta
Deal found 10/30$255
This Delta deal was found by Cheapflights users on 10/28. 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.
Thu 12/412:32 amPDX - RAP
1 stop8h 50mDelta
Wed 12/102:51 pmRAP - PDX
1 stop7h 01mDelta
Deal found 10/28$259
This Delta deal was found by Cheapflights users on 10/27. 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 11/112:09 pmGEG - RAP
1 stop7h 30mDelta
Sat 11/152:51 pmRAP - GEG
2 stops8h 50mDelta
Deal found 10/27$264
This American Airlines deal was found by Cheapflights users on 10/28. 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.
Mon 12/81:28 pmPDX - FSD
1 stop8h 31mAmerican Airlines
Mon 12/152:35 pmFSD - PDX
1 stop8h 15mAmerican Airlines
Deal found 10/28$269
This American Airlines deal was found by Cheapflights users on 10/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/512:38 amSEA - FSD
1 stop8h 28mAmerican Airlines
Mon 12/85:18 pmFSD - SEA
1 stop8h 20mAmerican Airlines
Deal found 10/30$269
This Delta deal was found by Cheapflights users on 10/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/810:05 amPDX - FSD
2 stops7h 35mDelta
Mon 12/154:25 pmFSD - PDX
1 stop6h 27mDelta
Deal found 10/29$274
This Delta deal was found by Cheapflights users on 10/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:00 amPSC - RAP
1 stop7h 11mDelta
Mon 11/172:51 pmRAP - PSC
1 stop5h 58mDelta
Deal found 10/29$279
This United Airlines deal was found by Cheapflights users on 10/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/135:10 amGEG - RAP
1 stop6h 30mUnited Airlines
Mon 11/178:45 amRAP - GEG
1 stop7h 36mUnited Airlines
Deal found 10/29$279

Cheap 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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$139
(Mytrip)

One-way from

$120
(Kiwi.com)

Popular in

April

Cheapest in

November

Average price

$408
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. 17% potential increase in price ($94 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 30, 2025.
Use the filters below to find and compare flights from Washington to South Dakota that are best for you.

Fly from

Washington

Fly to

South Dakota

Route

Depart

Return

Price

SeattleSioux Falls

SEA - FSD

SEAFSD

Seattle/Tacoma Intl

Thu 11/13

12:58 pm-1:42 pm

1 stop22h 44m

Sioux Falls Joe Foss Field

Mon 11/17

2:32 pm-12:07 pm

1 stop23h 35m

$139

PortlandSioux Falls

PDX - FSD

PDXFSD

Portland

Thu 11/13

12:52 pm-1:42 pm

1 stop22h 50m

Sioux Falls Joe Foss Field

Mon 11/17

2:32 pm-11:56 am

1 stop23h 24m

$159

SpokaneRapid City

GEG - RAP

GEGRAP

Spokane

Tue 12/9

5:25 am-11:26 am

1 stop5h 01m

Rapid City

Tue 12/16

2:55 pm-8:59 pm

1 stop7h 04m

$249

SpokaneRapid City

GEG - RAP

GEGRAP

Spokane

Tue 12/9

2:15 pm-10:46 pm

1 stop7h 31m

Rapid City

Tue 12/16

2:51 pm-8:10 pm

1 stop6h 19m

$249

SpokaneRapid City

GEG - RAP

GEGRAP

Spokane

Tue 3/3

6:30 am-3:14 pm

1 stop7h 44m

Rapid City

Sat 3/7

4:00 pm-11:16 pm

1 stop8h 16m

$249

SpokaneSioux Falls

GEG - FSD

GEGFSD

Spokane

Thu 12/4

1:12 pm-11:14 pm

1 stop8h 02m

Sioux Falls Joe Foss Field

Tue 12/9

8:01 am-1:18 pm

1 stop7h 17m

$255

PortlandRapid City

PDX - RAP

PDXRAP

Portland

Fri 12/5

1:59 pm-10:46 pm

1 stop7h 47m

Rapid City

Wed 12/10

2:51 pm-8:52 pm

1 stop7h 01m

$259

SpokaneRapid City

GEG - RAP

GEGRAP

Spokane

Tue 11/11

2:09 pm-10:39 pm

1 stop7h 30m

Rapid City

Sat 11/15

2:51 pm-8:03 pm

1 stop6h 12m

$259

PortlandRapid City

PDX - RAP

PDXRAP

Portland

Thu 12/4

12:32 am-10:22 am

1 stop8h 50m

Rapid City

Thu 12/11

2:51 pm-12:15 am

2 stops10h 24m

$264

SeattleSioux Falls

SEA - FSD

SEAFSD

Seattle/Tacoma Intl

Fri 12/5

12:38 am-11:06 am

1 stop8h 28m

Sioux Falls Joe Foss Field

Mon 12/8

6:00 am-1:06 pm

1 stop9h 06m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 51 results
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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, March is the cheapest month in which you can book a flight from State of Washington to South Dakota (average of $99). Flying from State of Washington to South Dakota in September is currently the most expensive (average of $259). 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 WA to SD?

Find hourly flight availability from Washington to South Dakota. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

When flying from State of Washington to South Dakota, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 39% versus a flight at noon.

What is the cheapest day to fly from State of Washington to South Dakota?

Use this chart to determine the cheapest time to fly round-trip from Washington to South Dakota. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their State of Washington to South Dakota flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 October 30, 2025.
Read through reviews of airlines operating flights from Washington to South Dakota, such as Delta, United Airlines, and American 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
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,998 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,996 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,034 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Sun Country Air
6.9
Okay
335 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Frontier
5.8
Fair
3,123 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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?

    Frontier, United Airlines, and Delta can get you from State of Washington to South Dakota in just under 5h 01m. Your travel time can differ by up to 17h 43m. The distance between State of Washington and South Dakota is about 738 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from State of Washington to South Dakota one-way?

    The cheapest airlines for a one-way flight from State of Washington to South Dakota are Allegiant Air ($120), American Airlines ($126), and Delta ($126).

  • 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, March is the cheapest month in which you can book a flight from State of Washington to South Dakota (average of $99). Flying from State of Washington to South Dakota in September is currently the most expensive (average of $259). 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

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Top 5 airlines flying from Washington to South Dakota

Discover the top 5 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Sun Country AirCheapest$137Average$443FlexibilityNo cancel feeOn-time83%
FrontierCheapest$188Average$360FlexibilityNo cancel feeOn-time62%
DeltaCheapest$204Average$424FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$252Average$486FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$254Average$353FlexibilityNo cancel feeOn-time71%

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