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Sioux City

$169+ Cheap flights from Dulles Intl (IAD) to Sioux City (SUX)

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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SUX
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Dulles Intl to Sioux City

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Sioux City (SUX). 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 September 17, 2025.

Round-trip from

$324
(United Airlines)

One-way from

$169
(United Airlines)
From Washington, D.C. Dulles Intl to Sioux City Sioux Gateway
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One-way flight from Washington, D.C. Dulles Intl to Sioux City Sioux Gateway
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Find flight deals from Dulles Intl to Sioux City

Cheapest flights from Dulles Intl to Sioux City
Explore the most affordable flight options available from Dulles Intl to Sioux City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This United Airlines deal was found by Cheapflights users on 9/15. 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 10/86:50 pmIAD - SUX
1 stop5h 10mUnited Airlines
Tue 10/146:51 pmSUX - IAD
1 stop9h 31mUnited Airlines
Deal found 9/15$432
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Fri 10/178:20 amIAD - SUX
2 stops15h 40mUnited Airlines
Tue 10/217:50 amSUX - IAD
1 stop5h 01mUnited Airlines
Deal found 9/15$433
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Sat 11/18:25 amIAD - SUX
2 stops15h 34mUnited Airlines
Sat 11/87:45 amSUX - IAD
2 stops12h 34mUnited Airlines
Deal found 9/15$537
This United Airlines deal was found by Cheapflights users on 9/16. 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 9/236:40 pmIAD - SUX
1 stop5h 17mUnited Airlines
Sat 9/276:51 pmSUX - IAD
1 stop9h 31mUnited Airlines
Deal found 9/16$625
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/110:09 pmIAD - SUX
1 stop21h 05mUnited Airlines
Sun 10/57:50 amSUX - IAD
2 stops22h 45mUnited Airlines
Deal found 9/16$629

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Sioux City 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 September 17, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Sioux City that are best for you.

Fly from

Dulles Intl

Fly to

Sioux City

Route

Depart

Return

Price

Washington, D.C.Sioux City

IAD - SUX

IADSUX

Washington, D.C. Dulles Intl

Tue 10/21

6:50 pm-11:00 pm

1 stop5h 10m

Sioux City Sioux Gateway

Tue 10/28

6:46 pm-5:16 am

1 stop9h 30m

$432

Washington, D.C.Sioux City

IAD - SUX

IADSUX

Washington, D.C. Dulles Intl

Fri 10/17

8:20 am-11:00 pm

2 stops15h 40m

Sioux City Sioux Gateway

Tue 10/21

7:50 am-1:51 pm

1 stop5h 01m

$433

Washington, D.C.Sioux City

IAD - SUX

IADSUX

Washington, D.C. Dulles Intl

Wed 10/8

12:40 pm-11:00 pm

2 stops11h 20m

Sioux City Sioux Gateway

Tue 10/14

6:51 pm-5:22 am

1 stop9h 31m

$496

Washington, D.C.Sioux City

IAD - SUX

IADSUX

Washington, D.C. Dulles Intl

Sat 11/1

8:25 am-10:59 pm

2 stops15h 34m

Sioux City Sioux Gateway

Sat 11/8

7:45 am-9:19 pm

2 stops12h 34m

$537

Washington, D.C.Sioux City

IAD - SUX

IADSUX

Washington, D.C. Dulles Intl

Tue 9/23

6:40 pm-10:57 pm

1 stop5h 17m

Sioux City Sioux Gateway

Sat 9/27

6:51 pm-5:22 am

1 stop9h 31m

$625

Washington, D.C.Sioux City

IAD - SUX

IADSUX

Washington, D.C. Dulles Intl

Wed 10/1

10:09 pm-6:14 pm

1 stop21h 05m

Sioux City Sioux Gateway

Sun 10/5

7:50 am-7:35 am

2 stops22h 45m

$629

Washington, D.C.Sioux City

IAD - SUX

IADSUX

Washington, D.C. Dulles Intl

Wed 10/15

5:15 pm-11:00 pm

1 stop6h 45m

$169

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

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

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

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Sioux City

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Sioux City?

Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sioux City (average of $318). Flying from Washington, D.C. Dulles Intl Airport to Sioux City in March is currently the most expensive (average of $446). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Sioux City. 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 into for flights to Sioux City from Washington, D.C. Dulles Intl?

    Located just 7.0 mi from the city center, Sioux City Sioux Gateway is the airport most travelers will use when flying to Sioux City from Washington, D.C. Dulles Intl. Booking flights from Washington, D.C. Dulles Intl to Sioux Gateway (SUX) should be relatively easy as there are 0 daily inbound flights from Washington, D.C. Dulles Intl from 0 different airlines.

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

    Airlines like United Airlines fly from Washington, D.C. Dulles Intl Airport to Sioux City in about 5h 10m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 1017 mi.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Sioux City?

    Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sioux City (average of $318). Flying from Washington, D.C. Dulles Intl Airport to Sioux City in March is currently the most expensive (average of $446). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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