What is the cheapest airline that flies from Washington to South Dakota?

Allegiant Air, United Airlines, and Sun Country Air are the most popular carriers operating from Washington to South Dakota

How long is the flight from State of Washington to South Dakota?

The flight from State of Washington to South Dakota depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Spokane (a popular airport in State of Washington) to Sioux Falls (the most popular airport in South Dakota), then the flight time is 4h 44m on average. If you fly from Seattle (another popular airport in State of Washington) to Sioux Falls, then the average flight time is 5h 21m.

What airlines fly to South Dakota?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to South Dakota from State of Washington according to our data. United Airlines is the first choice among our users, with 57% of people opting to fly with this airline when traveling to South Dakota. Keep in mind that there are 5 different airlines that fly to South Dakota on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Washington to South Dakota?

Prices for flights from Washington to South Dakota are refreshed on a daily basis.

How many operators does momondo search for flights from Washington to South Dakota?

As of March 2026, there are 5 operators available to choose from for flights from Washington to South Dakota.

How old do you have to be to fly from Washington to South Dakota?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington to South Dakota.

What documentation or ID do you need to fly to South Dakota?

The travel and health documents you'll need for your trip to South Dakota may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at South Dakota. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$92 Cheap Flights from Washington to South Dakota in 2026

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Find the cheapest flights from Washington to South Dakota

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:48 am - 7:21 pm

PDX

FSD

5h 33m

1 stop

7:18 pm - 4:46 pm

FSD

PDX

23h 28m

1 stop

$162Frontier

Mon, Apr 27 - Wed, May 6

7:12 pm - 7:21 pm

SEA

FSD

22h 09m

1 stop

8:06 pm - 9:27 am

FSD

SEA

15h 21m

1 stop

$221Frontier

Sun, Apr 26 - Fri, May 1

4:15 pm - 11:44 pm

PDX

FSD

5h 29m

1 stop

6:00 am - 9:48 am

FSD

PDX

5h 48m

1 stop

$291United Airlines

Wed, Apr 15 - Wed, Apr 22

12:35 pm - 3:22 pm

PDX

FSD

24h 47m

1 stop

4:26 pm - 6:56 pm

FSD

PDX

28h 30m

1 stop

$295Multiple Airlines

Thu, May 7 - Wed, May 13

4:15 pm - 11:44 pm

PDX

FSD

5h 29m

1 stop

6:00 am - 2:30 pm

FSD

PDX

10h 30m

2 stops

$296United Airlines

Wed, Apr 15 - Wed, Apr 22

7:46 pm - 8:45 pm

PDX

FSD

22h 59m

1 stop

7:18 pm - 4:46 pm

FSD

PDX

23h 28m

1 stop

$309Multiple Airlines

Sun, May 10 - Wed, May 13

1:22 pm - 11:11 pm

GEG

FSD

7h 49m

1 stop

6:47 am - 12:32 pm

FSD

GEG

7h 45m

1 stop

$315American Airlines

Fri, May 1 - Tue, May 5

11:47 pm - 11:23 am

PDX

RAP

10h 36m

1 stop

6:00 am - 12:58 pm

RAP

PDX

7h 58m

1 stop

$319American Airlines

Tue, Apr 21 - Tue, Apr 28

11:53 pm - 9:58 am

SEA

RAP

9h 05m

1 stop

2:25 pm - 12:01 am

RAP

SEA

10h 36m

2 stops

$324Delta

Thu, Aug 13 - Tue, Aug 25

6:00 am - 3:15 pm

SEA

RAP

8h 15m

1 stop

10:58 am - 4:45 pm

RAP

SEA

6h 47m

1 stop

$334Delta

Sat, Apr 18 - Sat, Apr 25

Frontier flights from State of Washington to South Dakota

Our best Frontier deals on State of Washington to South Dakota flight tickets

Frontier

Apr 27

PDX11:48 amPortland

5h 33m

1 stop

FSD7:21 pmSioux Falls Joe Foss Field

May 6

FSD7:18 pmSioux Falls Joe Foss Field

23h 28m

1 stop

PDX4:46 pmPortland

$162

Frontier

Apr 26

SEA7:12 pmSeattle/Tacoma Intl

22h 09m

1 stop

FSD7:21 pmSioux Falls Joe Foss Field

May 1

FSD8:06 pmSioux Falls Joe Foss Field

15h 21m

1 stop

SEA9:27 amSeattle/Tacoma Intl

$221

Frontier

Apr 9

SEA12:42 pmSeattle/Tacoma Intl

27h 49m

1 stop

FSD6:31 pmSioux Falls Joe Foss Field

Apr 13

FSD7:21 pmSioux Falls Joe Foss Field

16h 06m

1 stop

SEA9:27 amSeattle/Tacoma Intl

$246

American Airlines flights from State of Washington to South Dakota

Our best American Airlines deals on State of Washington to South Dakota flight tickets

American Airlines

May 1

GEG1:22 pmSpokane

7h 49m

1 stop

FSD11:11 pmSioux Falls Joe Foss Field

May 5

FSD6:47 amSioux Falls Joe Foss Field

7h 45m

1 stop

GEG12:32 pmSpokane

$315

American Airlines

Apr 21

PDX11:47 pmPortland

10h 36m

1 stop

RAP11:23 amRapid City

Apr 28

RAP6:00 amRapid City

7h 58m

1 stop

PDX12:58 pmPortland

$319

American Airlines

Apr 9

PDX1:52 pmPortland

7h 06m

1 stop

RAP9:58 pmRapid City

Apr 16

RAP4:57 pmRapid City

7h 57m

1 stop

PDX11:54 pmPortland

$344

momondo Fare Finder

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

Mon 4/27

11:48 am-7:21 pm

1 stop5h 33m

Sioux Falls Joe Foss Field

Wed 5/6

7:18 pm-4:46 pm

1 stop23h 28m

$162

SeattleSioux Falls

SEA - FSD

SEAFSD

Seattle/Tacoma Intl

Sun 4/26

7:12 pm-7:21 pm

1 stop22h 09m

Sioux Falls Joe Foss Field

Fri 5/1

8:06 pm-9:27 am

1 stop15h 21m

$221

Quickest round-trip

PortlandSioux Falls

PDX - FSD

PDXFSD

Portland

Wed 4/15

4:15 pm-11:44 pm

1 stop5h 29m

Sioux Falls Joe Foss Field

Wed 4/22

6:00 am-9:48 am

1 stop5h 48m

$291

PortlandSioux Falls

PDX - FSD

PDXFSD

Portland

Thu 5/7

12:35 pm-3:22 pm

1 stop24h 47m

Sioux Falls Joe Foss Field

Wed 5/13

4:26 pm-6:56 pm

1 stop28h 30m

$295

PortlandSioux Falls

PDX - FSD

PDXFSD

Portland

Wed 4/15

4:15 pm-11:44 pm

1 stop5h 29m

Sioux Falls Joe Foss Field

Wed 4/22

6:00 am-2:30 pm

2 stops10h 30m

$296

PortlandSioux Falls

PDX - FSD

PDXFSD

Portland

Sun 5/10

7:46 pm-8:45 pm

1 stop22h 59m

Sioux Falls Joe Foss Field

Wed 5/13

7:18 pm-4:46 pm

1 stop23h 28m

$309

SpokaneSioux Falls

GEG - FSD

GEGFSD

Spokane

Fri 5/1

1:22 pm-11:11 pm

1 stop7h 49m

Sioux Falls Joe Foss Field

Tue 5/5

6:47 am-12:32 pm

1 stop7h 45m

$315

PortlandRapid City

PDX - RAP

PDXRAP

Portland

Tue 4/21

11:47 pm-11:23 am

1 stop10h 36m

Rapid City

Tue 4/28

6:00 am-12:58 pm

1 stop7h 58m

$319

SeattleRapid City

SEA - RAP

SEARAP

Seattle/Tacoma Intl

Thu 8/13

11:53 pm-9:58 am

1 stop9h 05m

Rapid City

Tue 8/25

2:25 pm-12:01 am

2 stops10h 36m

$324

SeattleRapid City

SEA - RAP

SEARAP

Seattle/Tacoma Intl

Sat 4/18

6:00 am-3:15 pm

1 stop8h 15m

Rapid City

Sat 4/25

10:58 am-4:45 pm

1 stop6h 47m

$334

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from State of Washington to South Dakota

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to South Dakota?

The month of October is, on average, the cheapest month to fly to South Dakota from State of Washington, with most prices found around $278. If you aren’t able to travel to South Dakota during the month of October, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $286.

How far in advance should I book a flight to South Dakota?

You are more likely to see cheaper flights to South Dakota from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to South Dakota for around $441 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to South Dakota from State of Washington for as low as $316 on momondo.

Can stopping save me money on State of Washington to South Dakota flights?

You could potentially save up to 1% on your flight if you consider stops on a State of Washington to South Dakota flight.

Cheap State of Washington to South Dakota flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to South Dakota

Fastest flight time	4h 55m
Direct flights	None

The fastest flight from State of Washington to South Dakota takes 4h 55m

There are no direct flights from State of Washington to South Dakota. There are no popular flight routes from State of Washington to South Dakota.

Search flight deals

When did momondo last update prices for flights from Washington to South Dakota?
Prices for flights from Washington to South Dakota are refreshed on a daily basis.
How many operators does momondo search for flights from Washington to South Dakota?
As of March 2026, there are 5 operators available to choose from for flights from Washington to South Dakota.
How old do you have to be to fly from Washington to South Dakota?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington to South Dakota.
What documentation or ID do you need to fly to South Dakota?
The travel and health documents you'll need for your trip to South Dakota may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at South Dakota. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from State of Washington to South Dakota

Compare and see reviews for airlines that fly from State of Washington to South Dakota with momondo

Airline	Rating	Free Cancellation	Price
Sun Country Air	PriceFrom $137	Free Cancellation	Rating 6.8 339 reviews	Search Sun Country Air flights
Frontier	PriceFrom $188	Free Cancellation	Rating 5.7 3,015 reviews	Search Frontier flights
Delta	PriceFrom $190	Free Cancellation	Rating 7.9 8,336 reviews	Search Delta flights
United Airlines	PriceFrom $252	Free Cancellation	Rating 7.4 9,488 reviews	Search United Airlines flights
American Airlines	PriceFrom $254	Free Cancellation	Rating 7.1 11,496 reviews	Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington to South Dakota?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington to South Dakota for you.

Can I find flights from Washington to South Dakota with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Washington to South Dakota flights to just show those with flexible booking policies.

How can momondo help me find flights from Washington to South Dakota?

momondo provides multiple filters to help you find the best flight to South Dakota from Washington. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Washington to South Dakota right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to South Dakota from Washington. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.