HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Sioux City

$295+ 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 3/31. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SUX
Mar 19 — Mar 261
Thu 3/19
Thu 3/26
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to Sioux City with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 February 17, 2026.

This United Airlines deal was found by Cheapflights users on 2/16. 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 3/35:10 pm
IAD
-
SUX
1 stop7h 32m
United Airlines
Sat 3/712:53 pm
SUX
-
IAD
1 stop6h 44m
United Airlines
Deal found 2/16$454
This United Airlines deal was found by Cheapflights users on 2/15. 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.
Tue 4/2810:33 pm
IAD
-
SUX
2 stops20h 23m
United Airlines
Sat 5/212:55 pm
SUX
-
IAD
1 stop5h 33m
United Airlines
Deal found 2/15$486
This United Airlines deal was found by Cheapflights users on 2/15. 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 4/16:15 am
IAD
-
SUX
1 stop12h 41m
United Airlines
Wed 4/812:55 pm
SUX
-
IAD
1 stop10h 20m
United Airlines
Deal found 2/15$500
This United Airlines deal was found by Cheapflights users on 2/16. 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.
Fri 3/1310:20 pm
IAD
-
SUX
2 stops20h 21m
United Airlines
Mon 3/1612:53 pm
SUX
-
IAD
2 stops17h 27m
United Airlines
Deal found 2/16$507
This United Airlines deal was found by Cheapflights users on 2/16. 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.
Sat 3/2110:30 pm
IAD
-
SUX
1 stop13h 15m
United Airlines
Tue 3/2412:53 pm
SUX
-
IAD
2 stops17h 27m
United Airlines
Deal found 2/16$596

Find 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 February 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$454
(United Airlines)

One-way from

$295
(United Airlines)
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Sioux City Sioux Gateway flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Sioux City Sioux Gateway flights.
Search Deals
From Washington, D.C. Dulles Intl to Sioux City Sioux Gateway
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Sioux City Sioux Gateway
Search Deals

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 February 17, 2026.
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 3/3

5:10 pm-11:42 pm

1 stop7h 32m

Sioux City Sioux Gateway

Sat 3/7

12:53 pm-8:37 pm

1 stop6h 44m

$454

Washington, D.C.Sioux City

IAD - SUX

IADSUX

Washington, D.C. Dulles Intl

Tue 4/28

10:33 pm-5:56 pm

2 stops20h 23m

Sioux City Sioux Gateway

Sat 5/2

12:55 pm-9:18 pm

1 stop7h 23m

$486

Washington, D.C.Sioux City

IAD - SUX

IADSUX

Washington, D.C. Dulles Intl

Wed 4/1

8:33 am-5:56 pm

2 stops10h 23m

Sioux City Sioux Gateway

Wed 4/8

12:55 pm-12:15 am

1 stop10h 20m

$490

Washington, D.C.Sioux City

IAD - SUX

IADSUX

Washington, D.C. Dulles Intl

Fri 3/13

10:20 pm-5:41 pm

2 stops20h 21m

Sioux City Sioux Gateway

Mon 3/16

12:53 pm-7:20 am

2 stops17h 27m

$507

Washington, D.C.Sioux City

IAD - SUX

IADSUX

Washington, D.C. Dulles Intl

Tue 3/31

6:15 am-5:56 pm

1 stop12h 41m

$295

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/13

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Sioux City flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Sioux City flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Sioux City flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Sioux City flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-Sioux City flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 $126). Flying from Washington, D.C. Dulles Intl Airport to Sioux City in December is currently the most expensive (average of $458). 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 7h 32m. 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 $126). Flying from Washington, D.C. Dulles Intl Airport to Sioux City in December is currently the most expensive (average of $458). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.