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Dulles Intl

$343+ Cheap flights from Sioux City (SUX) to Dulles Intl (IAD)

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 7/3. Fares are subject to change and may not be available on all flights or dates of travel.
SUX — IAD
Jul 11 — Jul 181
Sat 7/11
Sat 7/18
1 adult, Economy
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Cheap flight deals from Sioux City to Dulles Intl

Cheapest flights from Sioux City to Dulles Intl
Explore the most affordable flight options available from Sioux City to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 11, 2026.

This United Airlines deal was found by Cheapflights users on 6/9. 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 10/279:03 am
SUX
-
IAD
1 stop14h 11m
United Airlines
Sat 10/311:05 pm
IAD
-
SUX
1 stop5h 49m
United Airlines
Deal found 6/9$495
This United Airlines deal was found by Cheapflights users on 6/7. 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 8/267:45 am
SUX
-
IAD
1 stop7h 17m
United Airlines
Sat 8/2910:27 pm
IAD
-
SUX
1 stop20h 26m
United Airlines
Deal found 6/7$558
This United Airlines deal was found by Cheapflights users on 6/8. 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.
Mon 7/68:10 am
SUX
-
IAD
2 stops26h 17m
United Airlines
Sun 7/1210:31 am
IAD
-
SUX
1 stop8h 22m
United Airlines
Deal found 6/8$664

Find flight deals from Sioux City to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Sioux City (SUX) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 11, 2026.

Round-trip from

$495
(United Airlines)

One-way from

$343
(United Airlines)
From Sioux City Sioux Gateway to Washington, D.C. Dulles Intl
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One-way flight from Sioux City Sioux Gateway to Washington, D.C. Dulles Intl
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Sioux City to Dulles Intl 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 June 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

Cheapest round-trip

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

Tue 10/27

9:03 am-11:10 am

2 stops25h 07m

Washington, D.C. Dulles Intl

Sat 10/31

1:05 pm-5:54 pm

1 stop5h 49m

$523

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

Wed 8/26

7:45 am-1:55 pm

1 stop5h 10m

Washington, D.C. Dulles Intl

Sat 8/29

10:44 pm-5:53 pm

2 stops20h 09m

$611

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

Mon 7/6

8:10 am-11:27 am

2 stops26h 17m

Washington, D.C. Dulles Intl

Sun 7/12

10:31 am-5:53 pm

1 stop8h 22m

$664

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

Thu 7/2

8:10 am-7:13 am

2 stops22h 03m

Washington, D.C. Dulles Intl

Sun 7/5

10:24 pm-5:53 pm

2 stops20h 29m

$737
Quickest round-trip

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

Thu 7/2

8:10 am-7:02 pm

1 stop9h 52m

Washington, D.C. Dulles Intl

Mon 7/6

8:15 am-5:53 pm

1 stop10h 38m

$743
Cheapest one-way

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

Thu 7/2

8:10 am-7:22 am

2 stops22h 12m

$449
Quickest one-way

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

Fri 7/3

6:35 pm-2:08 pm

2 stops18h 33m

$470

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Sorted by cheapest first

Best time to book a flight from Sioux City to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Sioux City 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.

Related info for your journey

Find useful and relevant information for your journey from Sioux City to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Sioux City to Washington, D.C. Dulles Intl?

    For a flight from Sioux City to Washington, D.C. Dulles Intl, you will be flying from Sioux Gateway. Sioux City Sioux Gateway (SUX) is just 7.0 mi from the center of the city. Sioux Gateway is the only Sioux City airport and it handles 0 outbound flights to Washington, D.C. Dulles Intl per day. 0 airlines have flights to Washington, D.C. Dulles Intl from Sioux City Sioux Gateway on a regular basis.

  • How long is the flight from Sioux City to Washington, D.C. Dulles Intl Airport?

    Airlines like United Airlines fly from Sioux City to Washington, D.C. Dulles Intl Airport in about 25h 07m. The time it takes to get you to your destination can typically vary by up to . Sioux City and Washington, D.C. Dulles Intl Airport are separated by a distance of 1017 mi.

  • Can I find deals for flights from Sioux City to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Sioux City to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Sioux City to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sioux City to Dulles Intl.

  • Can I find deals for business class flights from Sioux City to Dulles Intl?

    Yes. Cheapflights offers flight deals from Sioux City to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Tysons
Owings Mills
Springfield
Arlington
Reston
Rockville
Herndon
Fredericksburg
Laurel
Hyattsville
Manassas
Hanover
Chantilly
Lanham
Falls Church
Waldorf
Silver Spring
Largo
Clinton

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