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Cheap flights from Sioux City to Washington, D.C. from $433

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Sioux City to Washington, D.C. departing on 3/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
1:00 pm - 9:23 pmSUX-IAD
7h 23m1 stop
United Airlines Logo
8:20 am - 5:41 pmIAD-SUX
10h 21m2 stops
$433United Airlines
Find Deal
Wed, Mar 4 - Sat, Mar 7
United Airlines Logo
1:00 pm - 9:23 pmSUX-IAD
7h 23m1 stop
United Airlines Logo
10:31 pm - 4:41 pmIAD-SUX
19h 10m1 stop
$448United Airlines
Find Deal
Wed, Mar 4 - Sat, Mar 7
United Airlines Logo
1:00 pm - 7:29 amSUX-IAD
17h 29m2 stops
United Airlines Logo
10:20 pm - 4:41 pmIAD-SUX
19h 21m2 stops
$517United Airlines
Find Deal
Wed, Mar 4 - Sat, Mar 7
United Airlines Logo
1:00 pm - 9:23 pmSUX-IAD
7h 23m1 stop
United Airlines Logo
5:19 pm - 9:39 amIAD-SUX
17h 20m1 stop
$558United Airlines
Find Deal
Wed, Mar 4 - Sat, Mar 7
United Airlines Logo
1:00 pm - 7:29 amSUX-IAD
17h 29m2 stops
United Airlines Logo
10:30 pm - 9:39 amIAD-SUX
12h 09m1 stop
$592United Airlines
Find Deal
Wed, Mar 4 - Sat, Mar 7

United Airlines flights from Sioux City to Washington, D.C. Dulles Intl Airport

Our best United Airlines deals on Sioux City to Washington, D.C. Dulles Intl Airport flight tickets
United Airlines
Mar 4
SUX1:00 pmSioux City Sioux Gateway
7h 23m
1 stop
IAD9:23 pmWashington, D.C. Dulles Intl
Mar 7
IAD8:20 amWashington, D.C. Dulles Intl
10h 21m
2 stops
SUX5:41 pmSioux City Sioux Gateway
$433
Find similar
United Airlines
Mar 4
SUX1:00 pmSioux City Sioux Gateway
7h 23m
1 stop
IAD9:23 pmWashington, D.C. Dulles Intl
Mar 7
IAD10:31 pmWashington, D.C. Dulles Intl
19h 10m
1 stop
SUX4:41 pmSioux City Sioux Gateway
$448
Find similar
United Airlines
Mar 4
SUX1:00 pmSioux City Sioux Gateway
17h 29m
2 stops
IAD7:29 amWashington, D.C. Dulles Intl
Mar 7
IAD10:20 pmWashington, D.C. Dulles Intl
19h 21m
2 stops
SUX4:41 pmSioux City Sioux Gateway
$517
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Sioux City to Washington, D.C. Dulles Intl Airport 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, momondo users made 832,500 searches. Data last updated November 16, 2025.
Use the filters below to find and compare flights from Sioux City to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

Wed 3/4

1:00 pm-9:23 pm

1 stop7h 23m

Washington, D.C. Dulles Intl

Sat 3/7

8:20 am-5:41 pm

2 stops10h 21m

$433

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

Wed 3/4

1:00 pm-9:23 pm

1 stop7h 23m

Washington, D.C. Dulles Intl

Sat 3/7

10:31 pm-4:41 pm

1 stop19h 10m

$448

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

Wed 3/4

1:00 pm-7:29 am

2 stops17h 29m

Washington, D.C. Dulles Intl

Sat 3/7

10:20 pm-4:41 pm

2 stops19h 21m

$517

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

Wed 3/4

1:00 pm-9:23 pm

1 stop7h 23m

Washington, D.C. Dulles Intl

Sat 3/7

5:19 pm-9:39 am

1 stop17h 20m

$558

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

Wed 3/4

1:00 pm-7:29 am

2 stops17h 29m

Washington, D.C. Dulles Intl

Sat 3/7

10:30 pm-9:39 am

1 stop12h 09m

$592

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Sioux City to Washington, D.C. Dulles Intl Airport

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

What airlines fly to Washington, D.C. Dulles Intl Airport?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Washington, D.C. Dulles Intl Airport from Sioux City according to our data. United Airlines is the first choice among our users, with 50% of people opting to fly with this airline when traveling to Washington, D.C. Dulles Intl Airport. Keep in mind that there are 3 different airlines that fly to Washington, D.C. Dulles Intl Airport on a routine basis, so you have a few additional options to choose from.

When to book flights from Sioux City to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Sioux City to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Sioux City to Washington, D.C. Dulles Intl Airport (SUX to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Sioux City to Washington, D.C. Dulles Intl Airport

Direct flights

None
There are no direct flights from Sioux City to Washington, D.C. Dulles Intl Airport. There are no popular flight routes from Sioux City to Washington, D.C. Dulles Intl Airport.
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  • How far is Sioux City Sioux Gateway to Washington, D.C. Dulles Intl by plane?

    Sioux City Sioux Gateway and Washington, D.C. Dulles Intl are 1019.1 mi apart from one another. Typically, this will take 7h 23m by plane in normal conditions.

  • When did momondo last update prices for flights from Sioux City Sioux Gateway Airport to Washington, D.C. Dulles Intl Airport?

    Prices for flights from Sioux City Sioux Gateway Airport to Washington, D.C. Dulles Intl Airport were last updated today.

  • How old do you have to be to fly from Sioux City Sioux Gateway Airport to Washington, D.C. Dulles Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Sioux City Sioux Gateway Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The required travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C. Dulles Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Winchester
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Harpers Ferry
Towson
Rockville
Reston
Manassas
Gaithersburg
Fairfax
Glen Burnie

Why use momondo?

Why should I use momondo to find a flight deal from Sioux City to Washington, D.C.?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Sioux City to Washington, D.C.. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Sioux City to Washington, D.C. with flexible booking policies on momondo?

All flight searches from Sioux City to Washington, D.C. on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Sioux City to Washington, D.C.?

Once you have performed a search for Sioux City to Washington, D.C. flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Sioux City to Washington, D.C. right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Washington, D.C., momondo offers a useful price alert feature which will track prices for flights to Washington, D.C. from Sioux City and alert you when they change.

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