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Dulles Intl

$640+ Cheap flights from Sioux City (SUX) to Dulles Intl (IAD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
SUX — IAD
Mai 25 — Jun 11
Mo 5/25
Mo 6/1
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 April 25, 2026.

This KAYAK deal was found by Cheapflights users on 4/21. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mo 5/1112:55 pm
SUX
-
IAD
1 stop27h 35m
United Airlines
Mi 5/1310:35 pm
IAD
-
SUX
1 stop13h 06m
United Airlines
Deal found 4/21$640
This United Airlines deal was found by Cheapflights users on 4/24. 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.
Mo 5/412:55 pm
SUX
-
IAD
1 stop7h 25m
United Airlines
Sa 5/96:00 am
IAD
-
SUX
2 stops13h 06m
United Airlines
Deal found 4/24$647
This United Airlines deal was found by Cheapflights users on 4/21. 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.
Di 5/196:00 am
SUX
-
IAD
1 stop28h 28m
United Airlines
Di 5/263:56 pm
IAD
-
SUX
1 stop20h 01m
United Airlines
Deal found 4/21$654
This United Airlines deal was found by Cheapflights users on 4/24. 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.
Mo 5/412:55 pm
SUX
-
IAD
1 stop5h 33m
United Airlines
Fr 5/810:35 pm
IAD
-
SUX
1 stop13h 06m
United Airlines
Deal found 4/24$710
This United Airlines deal was found by Cheapflights users on 4/24. 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.
Di 5/512:55 pm
SUX
-
IAD
1 stop5h 33m
United Airlines
Sa 5/96:00 am
IAD
-
SUX
2 stops13h 06m
United Airlines
Deal found 4/24$757
This United Airlines deal was found by Cheapflights users on 4/23. 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.
Fr 5/112:55 pm
SUX
-
IAD
1 stop5h 33m
United Airlines
Mo 5/410:35 pm
IAD
-
SUX
1 stop13h 06m
United Airlines
Deal found 4/23$765
This United Airlines deal was found by Cheapflights users on 4/23. 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.
Fr 5/86:42 pm
SUX
-
IAD
1 stop9h 46m
United Airlines
Di 5/121:10 pm
IAD
-
SUX
1 stop5h 56m
United Airlines
Deal found 4/23$791
This United Airlines deal was found by Cheapflights users on 4/24. 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.
Di 5/512:55 pm
SUX
-
IAD
1 stop5h 33m
United Airlines
Fr 5/810:35 pm
IAD
-
SUX
1 stop13h 06m
United Airlines
Deal found 4/24$820

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 April 25, 2026.

Round-trip from

$640
(KAYAK)
From Sioux City Sioux Gateway to Washington, D.C. Dulles Intl
Search Deals

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 April 25, 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

Mo 5/11

12:55 pm-5:30 pm

1 stop27h 35m

Washington, D.C. Dulles Intl

Mi 5/13

10:35 pm-10:41 am

1 stop13h 06m

$640

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

Di 5/19

6:00 am-11:28 am

1 stop28h 28m

Washington, D.C. Dulles Intl

Di 5/26

3:56 pm-10:57 am

1 stop20h 01m

$654
Quickest round-trip

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

Di 5/5

12:55 pm-7:28 pm

1 stop5h 33m

Washington, D.C. Dulles Intl

Sa 5/9

6:00 am-6:06 pm

2 stops13h 06m

$757

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

Di 5/5

12:55 pm-7:28 pm

1 stop5h 33m

Washington, D.C. Dulles Intl

Fr 5/8

10:35 pm-10:41 am

1 stop13h 06m

$820

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

Sa 5/23

7:53 am-7:02 pm

1 stop10h 09m

Washington, D.C. Dulles Intl

Di 5/26

8:15 am-5:54 pm

1 stop10h 39m

$825

Sioux CityWashington, D.C.

SUX - IAD

SUXIAD

Sioux City Sioux Gateway

Fr 5/8

6:42 pm-5:28 am

1 stop9h 46m

Washington, D.C. Dulles Intl

Di 5/12

8:15 am-6:06 pm

2 stops10h 51m

$869

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/21

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 27h 35m. 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
Woodbridge
Silver Spring
Herndon
Rockville
Hyattsville
Fredericksburg
Hanover
Laurel
Manassas
Largo
Upper Marlboro
Waldorf
Bowie
Clinton
Hunt Valley

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