$274 Cheap United flights from Washington to Sioux Falls (IAD to FSD)

Find The Best Day To Fly from Washington to Sioux Falls

Amazing United IAD to FSD Flight Deals

The cheapest flights to Sioux Falls Regional found within the past 7 days were $292 round trip and $274 one way. Prices and availability subject to change. Additional terms may apply.

Thu, Oct 2 - Sun, Oct 5
IAD
Washington
FSD
Sioux Falls
$292 Roundtrip, found 6 hours ago
$292
Roundtrip
found 6 hours ago
Select United flight, departing Thu, Oct 2 from Washington to Sioux Falls, returning Sun, Oct 5, priced at $292 found 6 hours ago
Thu, Oct 2 - Sun, Oct 5
IAD
Washington
FSD
Sioux Falls
$373 Roundtrip, found 6 hours ago
$373
Roundtrip
found 6 hours ago
Select United flight, departing Thu, Oct 2 from Washington to Sioux Falls, returning Sun, Oct 5, priced at $373 found 6 hours ago
Thu, Oct 2 - Sun, Oct 5
IAD
Washington
FSD
Sioux Falls
$416 Roundtrip, found 6 hours ago
$416
Roundtrip
found 6 hours ago
Select United flight, departing Thu, Oct 2 from Washington to Sioux Falls, returning Sun, Oct 5, priced at $416 found 6 hours ago
Thu, Oct 2 - Sun, Oct 5
IAD
Washington
FSD
Sioux Falls
$427 Roundtrip, found 6 hours ago
$427
Roundtrip
found 6 hours ago
Select United flight, departing Thu, Oct 2 from Washington to Sioux Falls, returning Sun, Oct 5, priced at $427 found 6 hours ago
Thu, Oct 2 - Sun, Oct 5
IAD
Washington
FSD
Sioux Falls
$454 Roundtrip, found 6 hours ago
$454
Roundtrip
found 6 hours ago
Select United flight, departing Thu, Oct 2 from Washington to Sioux Falls, returning Sun, Oct 5, priced at $454 found 6 hours ago
Thu, Oct 2 - Sun, Oct 5
IAD
Washington
FSD
Sioux Falls
$497 Roundtrip, found 6 hours ago
$497
Roundtrip
found 6 hours ago
Select United flight, departing Thu, Oct 2 from Washington to Sioux Falls, returning Sun, Oct 5, priced at $497 found 6 hours ago

Frequently asked questions

Can I catch a flight from IAD to Joe Foss Field right now?
Make sure you visit our Covid-19 Travel Advisor to see if there are any current travel advice reports or quarantine requirements in effect in Joe Foss Field when flying from IAD.
What terminal is United Airlines at IAD?
Once you've received your ticket for your flight from Dulles Intl. Airport to Joe Foss Field, you should be able to identify exactly which terminals United Airlines flies in and out of. If not, consult your air carrier or do some research online for that information.
Are there United Airlines non-stop flights from IAD to FSD?
If you're looking at flights with United Airlines from Dulles Intl. Airport to Joe Foss Field, you'll need to make a stopover. While you're waiting for your connection, use the time to pick up a snack or check out the airport shops.
How long is a United Airlines flight from IAD to FSD?
Air traffic and weather permitting, your United Airlines flight from IAD to FSD should take on average 5 hours and 45 minutes. That means you've got ample time to enjoy a meal, get some rest and go over your itinerary before touchdown.
How many direct and indirect flights does United Airlines fly from IAD to FSD?
You can take your pick of roughly 3 flights daily with United Airlines from IAD to FSD.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to Sioux Falls Regional Airport (FSD), please visit our Customer Service Portal.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

Discover our best United flight from Washington IAD to Sioux Falls FSD 

To find the best deals on flights to Washington from Sioux Falls with United, just enter your travel dates, filter by United, and hit search. You’ll find flights to choose from and can sort by price, flight duration, and arrival or departure time.  

 

Return flights from Washington IAD to Sioux Falls FSD with United 

If you’re planning a round trip, booking return flights with United is usually the most cost-effective option. With airfares ranging from $292 to $497, it’s easy to find a flight that suits your budget. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way United flights from Washington IAD to Sioux Falls FSD 

A one-way ticket gives you much greater flexibility—allowing you to choose your return date, destination, and time whenever you’re ready. By booking in advance you can find great deals on one-way tickets too. Right now, a one-way United flight from Washington to Sioux Falls costs from $274. Prices and availability subject to change. Additional terms may apply. 

 

The easy way to find cheap flights to Sioux Falls FSD from  Washington IAD with United 

To find a cheap United flight from Washington IAD to Sioux Falls FSD, sort your search results by price or filter by budget. Thanks to Travelocity’s Price Match Promise, if you find a better airfare deal anywhere else within 24 hours, we’ll credit or refund the difference. 

 

How to find our best airfare deals on United flights from Washington IAD to Sioux Falls FSD 

If you’re looking for cheap flights, it helps to be flexible when it comes to your travel dates. You’ll usually find lower cost tickets when you travel during quieter months such as October, or if you book a flight with a stopover. 

 

Find nonstop flights from Washington IAD to Sioux Falls FSD with United 

If you’re keen to be on Sioux Falls soil fast, don’t waste time with a stopover—filter your search results to show direct United flights only. The journey takes around hour(s) min(s) – so you’ll be there before you know it. 

 

Flexible airline tickets for United flights from Washington IAD to Sioux Falls FSD 

Make sure you’re not out of pocket if plans change by choosing a flexible ticket with penalty-free amendment and cancellation options. Use our ‘no change fee’ filter to see which flights have this option.  

 

There are a lot of reasons to book your flights to Sioux Falls FSD from  Washington IAD with United on Travelocity 

At Travelocity our vast and up-to-the-minute inventory puts all of our best flight deals in one place. So, whether you’re traveling on business or jetting off with friends and family, you can trust Travelocity to get you there.

United Airports
Hop on a(n) United flight today by flying to many destinations out of these domestic and international airports:
Airport code
Country
Airport name
Number of flights
ORDUSAO'Hare Intl.227
DENUSADenver Intl.226
IAHUSAGeorge Bush Intercontinental136
IADUSAWashington Dulles Intl.100
SFOUSASan Francisco Intl.64
LAXUSALos Angeles Intl.23
EWRUSALiberty Intl.20
FRADEUFrankfurt Intl.19
NRTJPNNarita Intl.19
PEKCHNCapital Intl.16

Travelers ❤️ these 🏨 after their flight to Sioux Falls

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3 out of 5
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Free water park access, a casino, and 3 indoor pools are all featured at this smoke-free hotel. There's fun for all ages with a children's pool and a waterslide, ...
7.6/10 Good! (1,388 reviews)
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Reviewed on Sep 15, 2025

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Comfort Inn & Suites at Sanford Sports Complex

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2.5 out of 5
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Super clean and comfortable
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Reviewed on Sep 15, 2025

Comfort Inn & Suites at Sanford Sports Complex
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.
*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.