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Sioux City

$360+ Cheap flights from Reagan-National (DCA) 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 3/22. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — SUX
Feb 11 — Feb 181
Wed 2/11
Wed 2/18
1 adult, Economy
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Cheap flight deals from Reagan-National to Sioux City

Discover tips and strategies to find the most affordable flight options for your journey from Reagan-National (DCA) 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 January 12, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$374
(United Airlines)

One-way from

$360
(United Airlines)
Provider with most accurate pricing for Washington, D.C. Reagan-National-Sioux City Sioux Gateway flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Reagan-National-Sioux City Sioux Gateway flights.
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From Washington, D.C. Reagan-National to Sioux City Sioux Gateway
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One-way flight from Washington, D.C. Reagan-National to Sioux City Sioux Gateway
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Find flight deals from Reagan-National to Sioux City

Cheapest flights from Reagan-National to Sioux City
Explore the most affordable flight options available from Reagan-National to Sioux City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 12, 2026.

This United Airlines deal was found by Cheapflights users on 1/10. 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 1/2410:30 am
DCA
-
SUX
1 stop7h 58m
United Airlines
Wed 1/2812:45 pm
SUX
-
DCA
1 stop7h 14m
United Airlines
Deal found 1/10$374
This United Airlines deal was found by Cheapflights users on 1/10. 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 1/1710:30 am
DCA
-
SUX
1 stop7h 58m
United Airlines
Tue 1/2012:45 pm
SUX
-
DCA
1 stop5h 28m
United Airlines
Deal found 1/10$464
This United Airlines deal was found by Cheapflights users on 1/11. 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.
Thu 1/151:00 pm
DCA
-
SUX
1 stop5h 28m
United Airlines
Sun 1/1812:45 pm
SUX
-
DCA
1 stop7h 14m
United Airlines
Deal found 1/11$474
This United Airlines deal was found by Cheapflights users on 1/11. 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.
Thu 1/151:00 pm
DCA
-
SUX
1 stop5h 28m
United Airlines
Sat 1/1712:45 pm
SUX
-
DCA
1 stop5h 28m
United Airlines
Deal found 1/11$484
This United Airlines deal was found by Cheapflights users on 1/11. 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.
Fri 2/134:11 pm
DCA
-
SUX
1 stop8h 31m
United Airlines
Mon 2/161:00 pm
SUX
-
DCA
1 stop6h 59m
United Airlines
Deal found 1/11$490
This United Airlines deal was found by Cheapflights users on 1/11. 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.
Thu 5/211:00 pm
DCA
-
SUX
1 stop5h 32m
United Airlines
Sat 5/2312:45 pm
SUX
-
DCA
1 stop5h 07m
United Airlines
Deal found 1/11$564

Cheapflights Fare Finder

 
Customize your flight search to find flights from Reagan-National 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 January 12, 2026.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Sioux City that are best for you.

Fly from

Reagan-National

Fly to

Sioux City

Route

Depart

Return

Price

Washington, D.C.Sioux City

DCA - SUX

DCASUX

Washington, D.C. Reagan-National

Sat 1/24

10:30 am-5:28 pm

1 stop7h 58m

Sioux City Sioux Gateway

Wed 1/28

12:45 pm-8:59 pm

1 stop7h 14m

$374

Washington, D.C.Sioux City

DCA - SUX

DCASUX

Washington, D.C. Reagan-National

Fri 2/13

4:11 pm-11:42 pm

1 stop8h 31m

Sioux City Sioux Gateway

Mon 2/16

1:00 pm-8:59 pm

1 stop6h 59m

$490

Washington, D.C.Sioux City

DCA - SUX

DCASUX

Washington, D.C. Reagan-National

Thu 5/21

1:00 pm-5:32 pm

1 stop5h 32m

Sioux City Sioux Gateway

Sat 5/23

12:45 pm-6:52 pm

1 stop5h 07m

$564

Washington, D.C.Sioux City

DCA - SUX

DCASUX

Washington, D.C. Reagan-National

Sun 3/22

8:00 pm-5:41 pm

1 stop22h 41m

$360

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/10

Compare providers for flights from Reagan-National 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 Reagan-National to Sioux City in January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust 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. Reagan-National Airport-Sioux City flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C. Reagan-National Airport-Sioux City flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Washington, D.C. Reagan-National 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. Reagan-National Airport-Sioux City flights, Cheapflights users trust eDreams the most. eDreams 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. Reagan-National 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 Reagan-National to Sioux City

Have a flexible travel schedule? Discover the best time to fly to Sioux City from Reagan-National 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. Reagan-National Airport to Sioux City

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Sioux City (average of $148). Flying from Washington, D.C. Reagan-National Airport to Sioux City in April is currently the most expensive (average of $296). 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 Reagan-National 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. Reagan-National?

    If you book a flight to Sioux City from Washington, D.C. Reagan-National, you will be flying to Sioux Gateway, which is the city’s only airport. Sioux City Sioux Gateway (SUX) is located 7.0 mi from the center of Sioux City. There are 0 flights from Washington, D.C. Reagan-National to Sioux Gateway per day from 0 different airlines.

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

    United Airlines can get you from Washington, D.C. Reagan-National Airport to Sioux City in just under 7h 58m. Your travel time can differ by up to . There are 1040 mi between Washington, D.C. Reagan-National Airport and Sioux City.

  • Can I find deals for flights from Reagan-National to Sioux City that include hotel bookings?

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

  • How can I find direct flights from Reagan-National to Sioux City?

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

  • Can I find deals for business class flights from Reagan-National to Sioux City?

    Yes. Cheapflights offers flight deals from Reagan-National 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. Reagan-National Airport to Sioux City?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Sioux City (average of $148). Flying from Washington, D.C. Reagan-National Airport to Sioux City in April is currently the most expensive (average of $296). 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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