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$379+ Cheap flights from Washington, D.C. (WAS) to Sioux City (SUX)

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 4/25. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SUX
May 14 — May 211
Thu 5/14
Thu 5/21
1 adult, Economy
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Cheap flight deals from Washington, D.C. to Sioux City

Cheapest flights from Washington, D.C. to Sioux City
Explore the most affordable flight options available from Washington, D.C. to Sioux City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 14, 2026.

This United Airlines deal was found by Cheapflights users on 4/10. 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 4/251:00 pm
DCA
-
SUX
1 stop5h 56m
United Airlines
Wed 4/2912:55 pm
SUX
-
DCA
1 stop5h 18m
United Airlines
Deal found 4/10$379
This United Airlines deal was found by Cheapflights users on 4/13. 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 4/2811:55 am
DCA
-
SUX
1 stop7h 01m
United Airlines
Sat 5/212:55 pm
SUX
-
DCA
1 stop7h 11m
United Airlines
Deal found 4/13$467
This United Airlines deal was found by Cheapflights users on 4/13. 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 4/2811:08 am
BWI
-
SUX
1 stop7h 48m
United Airlines
Sat 5/26:00 am
SUX
-
BWI
1 stop8h 06m
United Airlines
Deal found 4/13$478
This United Airlines deal was found by Cheapflights users on 4/14. 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 4/2911:08 am
BWI
-
SUX
1 stop7h 48m
United Airlines
Sun 5/312:55 pm
SUX
-
BWI
1 stop7h 07m
United Airlines
Deal found 4/14$479
This United Airlines deal was found by Cheapflights users on 4/12. 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 6/811:57 am
DCA
-
SUX
1 stop6h 57m
United Airlines
Tue 6/167:53 am
SUX
-
DCA
1 stop5h 29m
United Airlines
Deal found 4/12$533
This United Airlines deal was found by Cheapflights users on 4/12. 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 6/810:23 pm
IAD
-
SUX
1 stop13h 34m
United Airlines
Tue 6/167:53 am
SUX
-
IAD
1 stop10h 09m
United Airlines
Deal found 4/12$589
This United Airlines deal was found by Cheapflights users on 4/12. 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 6/84:23 pm
BWI
-
SUX
1 stop19h 34m
United Airlines
Tue 6/167:53 am
SUX
-
BWI
1 stop5h 04m
United Airlines
Deal found 4/12$591
This United Airlines deal was found by Cheapflights users on 4/13. 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 4/288:12 pm
IAD
-
SUX
1 stop15h 34m
United Airlines
Sat 5/212:55 pm
SUX
-
IAD
1 stop5h 33m
United Airlines
Deal found 4/13$615
This United Airlines deal was found by Cheapflights users on 4/11. 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 5/138:15 am
IAD
-
SUX
2 stops10h 51m
United Airlines
Sat 5/1612:55 pm
SUX
-
IAD
2 stops17h 25m
United Airlines
Deal found 4/11$621
This deal was found by Cheapflights users on 4/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2811:57 am
DCA
-
SUX
1 stop6h 57m
United Airlines
Mon 6/17:53 am
SUX
-
DCA
1 stop5h 29m
United Airlines
Deal found 4/14$693
This United Airlines deal was found by Cheapflights users on 4/14. 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 4/298:12 pm
IAD
-
SUX
1 stop15h 29m
United Airlines
Sun 5/36:42 pm
SUX
-
IAD
1 stop15h 46m
United Airlines
Deal found 4/14$806
This deal was found by Cheapflights users on 4/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:25 pm
IAD
-
SUX
1 stop5h 29m
United Airlines
Mon 6/17:53 am
SUX
-
IAD
1 stop5h 15m
United Airlines
Deal found 4/14$926

Find flight deals from Washington, D.C. to Sioux City

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) 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 April 14, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$379
(United Airlines)
Provider with most accurate pricing for Washington, D.C. (WAS)-Sioux City Sioux Gateway flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Sioux City Sioux Gateway flights.
Search Deals
From Washington, D.C. (WAS) to Sioux City Sioux Gateway
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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 April 14, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Sioux City that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Sioux City

DCA - SUX

DCASUX

Washington, D.C. Reagan-National

Sat 4/25

1:00 pm-5:56 pm

1 stop5h 56m

Sioux City Sioux Gateway

Wed 4/29

12:55 pm-7:13 pm

1 stop5h 18m

$379

Washington, D.C.Sioux City

DCA - SUX

DCASUX

Washington, D.C. Reagan-National

Tue 4/28

11:55 am-5:56 pm

1 stop7h 01m

Sioux City Sioux Gateway

Sat 5/2

12:55 pm-9:06 pm

1 stop7h 11m

$467
Quickest round-trip

Washington, D.C.Sioux City

DCA - SUX

DCASUX

Washington, D.C. Reagan-National

Wed 4/29

1:00 pm-5:56 pm

1 stop5h 56m

Sioux City Sioux Gateway

Sun 5/3

12:55 pm-7:05 pm

1 stop5h 10m

$467

BaltimoreSioux City

BWI - SUX

BWISUX

Baltimore/Washington

Tue 4/28

11:08 am-5:56 pm

1 stop7h 48m

Sioux City Sioux Gateway

Sat 5/2

6:00 am-3:06 pm

1 stop8h 06m

$478

BaltimoreSioux City

BWI - SUX

BWISUX

Baltimore/Washington

Wed 4/29

11:08 am-5:56 pm

1 stop7h 48m

Sioux City Sioux Gateway

Sun 5/3

12:55 pm-9:02 pm

1 stop7h 07m

$479

Washington, D.C.Sioux City

DCA - SUX

DCASUX

Washington, D.C. Reagan-National

Mon 6/8

11:57 am-5:54 pm

1 stop6h 57m

Sioux City Sioux Gateway

Tue 6/16

7:53 am-2:22 pm

1 stop5h 29m

$533

BaltimoreSioux City

BWI - SUX

BWISUX

Baltimore/Washington

Mon 6/8

4:23 pm-10:57 am

1 stop19h 34m

Sioux City Sioux Gateway

Tue 6/16

7:53 am-1:57 pm

1 stop5h 04m

$591

Washington, D.C.Sioux City

IAD - SUX

IADSUX

Washington, D.C. Dulles Intl

Tue 4/28

8:12 pm-10:46 am

1 stop15h 34m

Sioux City Sioux Gateway

Sat 5/2

12:55 pm-7:28 pm

1 stop5h 33m

$615

Washington, D.C.Sioux City

IAD - SUX

IADSUX

Washington, D.C. Dulles Intl

Wed 5/13

8:15 am-6:06 pm

2 stops10h 51m

Sioux City Sioux Gateway

Sat 5/16

12:55 pm-7:20 am

2 stops17h 25m

$621

Washington, D.C.Sioux City

IAD - SUX

IADSUX

Washington, D.C. Dulles Intl

Wed 4/29

8:12 pm-10:41 am

1 stop15h 29m

Sioux City Sioux Gateway

Sun 5/3

6:42 pm-11:28 am

1 stop15h 46m

$806

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/12

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

Compare providers for flights from Washington, D.C. to Sioux City

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Washington, D.C. to Sioux City in April.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C.-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.-Sioux City flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C.-Sioux City flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C.-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.-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 Washington, D.C. to Sioux City

Have a flexible travel schedule? Discover the best time to fly to Sioux City from Washington, D.C. 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. to Sioux City

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

Currently, February is the cheapest month in which you can book a flight from Washington, D.C. to Sioux City (average of $126). Flying from Washington, D.C. to Sioux City in March is currently the most expensive (average of $315). 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.

Reviews of airlines servicing Sioux City

Get insights into the airlines that provide service to Sioux City. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sioux City. Reviews last updated April 14, 2026.
Read through reviews of airlines operating flights from Washington, D.C. to Sioux City, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,581 reviews

Comfort

7.3

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,581 reviews
United Airlines
7.4
Good
9,581 reviews

Comfort

7.3

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. 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.?

    Sioux City Sioux Gateway (SUX) is the airport you will fly into if you book a flight from Washington, D.C. to Sioux City. You should not have trouble finding flights to Sioux Gateway from Washington, D.C.; the airport handles an average of 0 inbound flights from Washington, D.C. per day. You should also have plenty of airline options to choose from since 1 airline has flights to the Sioux City airport from Washington, D.C.. It is only a 7.0 mi journey from Sioux Gateway (SUX) to Sioux City’s city center.

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

    There are many flights that can get you from Washington, D.C. to Sioux City in 5h 56m. Fly via United Airlines to get the fastest option. There are 1040 mi between Washington, D.C. and Sioux City.

  • What are the most popular routes from Washington, D.C. to Sioux City?

    Most travelers choose Baltimore/Washington - Sioux City Sioux Gateway, Washington, D.C. Dulles Intl - Sioux City Sioux Gateway or Washington, D.C. Reagan-National - Sioux City Sioux Gateway when deciding on the best route from Washington, D.C. to Sioux City.

  • Can I find deals for flights from Washington, D.C. to Sioux City that include hotel bookings?

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

  • How can I find direct flights from Washington, D.C. to Sioux City?

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

  • Can I find deals for business class flights from Washington, D.C. to Sioux City?

    Yes. Cheapflights offers flight deals from Washington, D.C. 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. to Sioux City?

    Currently, February is the cheapest month in which you can book a flight from Washington, D.C. to Sioux City (average of $126). Flying from Washington, D.C. to Sioux City in March is currently the most expensive (average of $315). 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

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Top airline flying from Washington, D.C. to Sioux City

Discover the top airline that operate flights from Washington, D.C. to Sioux City. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$263Average$533FlexibilityNo cancel feeOn-time69%

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