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Cheap flights from Sioux City to Washington, D.C. from $275

This is the cheapest one-way 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 2/8. 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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Find the cheapest flights from Sioux City to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
12:45 pm - 9:17 pm
SUX
-
IAD
7h 32m1 stop
United Airlines Logo
1:05 pm - 5:28 pm
IAD
-
SUX
5h 23m1 stop
$344United Airlines
lø., jan. 31 - on., feb. 4
United Airlines Logo
12:45 pm - 9:17 pm
SUX
-
IAD
7h 32m1 stop
United Airlines Logo
1:05 pm - 5:28 pm
IAD
-
SUX
5h 23m1 stop
$374United Airlines
lø., jan. 24 - ti., jan. 27
United Airlines Logo
6:00 am - 7:30 am
SUX
-
IAD
24h 30m2 stops
United Airlines Logo
1:05 pm - 5:28 pm
IAD
-
SUX
5h 23m1 stop
$432United Airlines
lø., jan. 31 - on., feb. 4
United Airlines Logo
12:45 pm - 9:17 pm
SUX
-
IAD
7h 32m1 stop
United Airlines Logo
8:20 am - 11:47 pm
IAD
-
SUX
16h 27m2 stops
$472United Airlines
lø., jan. 24 - ti., jan. 27
United Airlines Logo
6:00 am - 7:30 am
SUX
-
IAD
24h 30m2 stops
United Airlines Logo
10:20 pm - 5:28 pm
IAD
-
SUX
20h 08m2 stops
$515United Airlines
lø., jan. 31 - on., feb. 4
United Airlines Logo
12:45 pm - 7:30 am
SUX
-
IAD
17h 45m2 stops
United Airlines Logo
10:20 pm - 5:28 pm
IAD
-
SUX
20h 08m2 stops
$565United Airlines
lø., jan. 24 - ti., jan. 27

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
Jan 31
SUX12:45 pmSioux City Sioux Gateway
7h 32m
1 stop
IAD9:17 pmWashington, D.C. Dulles Intl
Feb 4
IAD1:05 pmWashington, D.C. Dulles Intl
5h 23m
1 stop
SUX5:28 pmSioux City Sioux Gateway
$344
United Airlines
Jan 24
SUX12:45 pmSioux City Sioux Gateway
7h 32m
1 stop
IAD9:17 pmWashington, D.C. Dulles Intl
Jan 27
IAD1:05 pmWashington, D.C. Dulles Intl
5h 23m
1 stop
SUX5:28 pmSioux City Sioux Gateway
$374
United Airlines
Jan 31
SUX6:00 amSioux City Sioux Gateway
24h 30m
2 stops
IAD7:30 amWashington, D.C. Dulles Intl
Feb 4
IAD1:05 pmWashington, D.C. Dulles Intl
5h 23m
1 stop
SUX5:28 pmSioux City Sioux Gateway
$432

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 Januar 11, 2026.
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

lø. 1/31

12:45 pm-9:17 pm

1 stop7h 32m

Washington, D.C. Dulles Intl

on. 2/4

1:05 pm-5:28 pm

1 stop5h 23m

$344

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

lø. 1/24

12:45 pm-9:17 pm

1 stop7h 32m

Washington, D.C. Dulles Intl

ti. 1/27

1:05 pm-5:28 pm

1 stop5h 23m

$374

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

lø. 1/31

6:00 am-7:30 am

2 stops24h 30m

Washington, D.C. Dulles Intl

on. 2/4

1:05 pm-5:28 pm

1 stop5h 23m

$432

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

lø. 1/24

12:45 pm-9:17 pm

1 stop7h 32m

Washington, D.C. Dulles Intl

ti. 1/27

8:20 am-11:47 pm

2 stops16h 27m

$472

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

lø. 1/31

6:00 am-7:30 am

2 stops24h 30m

Washington, D.C. Dulles Intl

on. 2/4

10:20 pm-5:28 pm

2 stops20h 08m

$515

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

lø. 1/24

12:45 pm-7:30 am

2 stops17h 45m

Washington, D.C. Dulles Intl

ti. 1/27

10:20 pm-5:28 pm

2 stops20h 08m

$565

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

sø. 2/8

12:45 pm-9:17 pm

1 stop7h 32m

$275

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

sø. 2/1

12:45 pm-9:17 pm

1 stop7h 32m

$312

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

ti. 2/10

6:00 am-4:30 pm

2 stops33h 30m

$315

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

ma. 2/2

12:45 pm-11:46 am

1 stop22h 01m

$316

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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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 is the cheapest airline that flies from Sioux City Sioux Gateway to Washington, D.C. Dulles Intl?

United Airlines is the most popular carrier operating from Sioux City Sioux Gateway to Washington, D.C. Dulles Intl

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

Fastest flight time

7h 32m

Direct flights

None
The fastest flight from Sioux City to Washington, D.C. Dulles Intl Airport takes 7h 32m
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 32m 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
Waldorf
Woodbridge
Tysons
Laurel
Colonial Beach
Silver Spring
Towson
Fredericksburg
Rockville
Gaithersburg
Harpers Ferry
Manassas
Sterling
Fairfax
Springfield

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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