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South Dakota

$109+ 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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — FSD
Aug 7 — Aug 141
Thu 8/7
Thu 8/14
1 adult, Economy
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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 August 2, 2025.

Round-trip from

$238
(Frontier)

One-way from

$113
(Delta)

Popular in

December

Cheapest in

January

Average price

$488
From Washington to South Dakota
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One-way flight from Washington to South Dakota
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Highest demand for flights based on searches. 3% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($9 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 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 2, 2025.

This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/46:35 amPDX - FSD
1 stop10h 02mFrontier
Wed 8/67:48 pmFSD - PDX
1 stop5h 36mFrontier
Deal found 8/1$228
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/156:25 amSEA - FSD
1 stop10h 12mFrontier
Mon 8/187:32 pmFSD - SEA
1 stop7h 02mFrontier
Deal found 8/1$238
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/153:05 pmGEG - FSD
1 stop6h 38mAmerican Airlines
Wed 11/195:30 amFSD - GEG
1 stop9h 02mAmerican Airlines
Deal found 8/1$251
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/152:05 pmGEG - FSD
1 stop6h 44mDelta
Wed 11/195:15 amFSD - GEG
2 stops8h 50mDelta
Deal found 7/31$256
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/255:29 amPDX - RAP
1 stop9h 34mAmerican Airlines
Wed 10/294:58 pmRAP - PDX
1 stop7h 31mAmerican Airlines
Deal found 8/1$259
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/86:00 amSEA - RAP
1 stop6h 45mDelta
Tue 10/144:34 pmRAP - SEA
1 stop8h 23mDelta
Deal found 7/30$259
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2411:42 amPDX - FSD
1 stop7h 41mAmerican Airlines
Mon 9/296:00 pmFSD - PDX
1 stop8h 05mAmerican Airlines
Deal found 7/31$260
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/301:05 pmSEA - RAP
2 stops7h 54mUnited Airlines
Thu 9/45:59 pmRAP - SEA
1 stop6h 00mUnited Airlines
Deal found 7/30$264
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2611:55 pmSEA - FSD
1 stop8h 24mDelta
Tue 9/25:00 amFSD - SEA
1 stop5h 48mDelta
Deal found 7/31$269
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/301:38 pmGEG - FSD
1 stop4h 51mUnited Airlines
Sat 9/65:06 pmFSD - GEG
1 stop5h 57mUnited Airlines
Deal found 8/1$272
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1710:51 amPDX - FSD
1 stop9h 21mUnited Airlines
Sun 9/216:00 amFSD - PDX
1 stop5h 28mUnited Airlines
Deal found 8/1$275
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/75:00 amSEA - FSD
1 stop5h 51mUnited Airlines
Sat 10/186:00 amFSD - SEA
2 stops10h 24mUnited Airlines
Deal found 8/1$288

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 2, 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

PortlandSioux Falls

PDX - FSD

PDXFSD

Portland

Thu 8/21

6:27 am-1:23 pm

1 stop4h 56m

Sioux Falls Joe Foss Field

Sun 8/24

2:08 pm-12:15 am

1 stop12h 07m

$238

SeattleSioux Falls

SEA - FSD

SEAFSD

Seattle/Tacoma Intl

Fri 8/15

6:25 am-6:37 pm

1 stop10h 12m

Sioux Falls Joe Foss Field

Mon 8/18

7:32 pm-12:34 am

1 stop7h 02m

$238

SpokaneSioux Falls

GEG - FSD

GEGFSD

Spokane

Sat 11/15

3:05 pm-11:43 pm

1 stop6h 38m

Sioux Falls Joe Foss Field

Wed 11/19

5:30 am-12:32 pm

1 stop9h 02m

$251

SpokaneSioux Falls

GEG - FSD

GEGFSD

Spokane

Sat 11/15

2:05 pm-10:49 pm

1 stop6h 44m

Sioux Falls Joe Foss Field

Wed 11/19

5:15 am-12:05 pm

2 stops8h 50m

$256

PortlandRapid City

PDX - RAP

PDXRAP

Portland

Sat 10/25

5:29 am-4:03 pm

1 stop9h 34m

Rapid City

Wed 10/29

4:58 pm-11:29 pm

1 stop7h 31m

$259

SeattleRapid City

SEA - RAP

SEARAP

Seattle/Tacoma Intl

Wed 10/8

6:00 am-1:45 pm

1 stop6h 45m

Rapid City

Tue 10/14

4:34 pm-11:57 pm

1 stop8h 23m

$259

PortlandSioux Falls

PDX - FSD

PDXFSD

Portland

Wed 9/24

11:42 am-9:23 pm

1 stop7h 41m

Sioux Falls Joe Foss Field

Mon 9/29

6:00 pm-12:05 am

1 stop8h 05m

$260

SeattleRapid City

SEA - RAP

SEARAP

Seattle/Tacoma Intl

Sat 8/30

1:05 pm-9:59 pm

2 stops7h 54m

Rapid City

Thu 9/4

5:59 pm-10:59 pm

1 stop6h 00m

$264

SeattleSioux Falls

SEA - FSD

SEAFSD

Seattle/Tacoma Intl

Tue 8/26

11:55 pm-10:19 am

1 stop8h 24m

Sioux Falls Joe Foss Field

Tue 9/2

5:00 am-8:48 am

1 stop5h 48m

$269

SpokaneSioux Falls

GEG - FSD

GEGFSD

Spokane

Sat 8/30

1:38 pm-8:29 pm

1 stop4h 51m

Sioux Falls Joe Foss Field

Sat 9/6

5:06 pm-9:03 pm

1 stop5h 57m

$272

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 45 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, September is the cheapest month in which you can book a flight from State of Washington to South Dakota (average of $334). Flying from State of Washington to South Dakota 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 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 August 2, 2025.

When flying from State of Washington to South Dakota, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 2, 2025.
Read through reviews of airlines operating flights from Washington to South Dakota, such as Alaska Airlines, Delta, and United 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,983 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,904 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Allegiant Air
7.2
Good
702 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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.

  • 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 Delta ($113), Frontier ($119), and United Airlines ($150).

  • 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, September is the cheapest month in which you can book a flight from State of Washington to South Dakota (average of $334). Flying from State of Washington to South Dakota 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

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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 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 August 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$128Average$346FlexibilityNo cancel feeOn-time62%
Sun Country AirCheapest$137Average$443FlexibilityNo cancel feeOn-time83%
DeltaCheapest$208Average$445FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$254Average$370FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$258Average$527FlexibilityNo cancel feeOn-time69%

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