WAS - SUX

$337 Find Cheap Flights from Washington, D.C. to Sioux City

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Washington, D.C. to Sioux City departing on 9/12. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Sioux City

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Sioux City, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Sioux City, as well as popular online travel agencies
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Cheap Flights from Washington, D.C. to Sioux City (WAS-SUX)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. to Sioux City that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Washington, D.C. to Sioux City

Fri, Sep 12 - Fri, Sep 19
United Airlines Logo
5:00 pm - 10:57 pmDCA-SUX
6h 57m1 stop
United Airlines Logo
7:49 am - 2:16 pmSUX-DCA
5h 27m1 stop
$337United Airlines
Find Deal
Wed, Sep 17 - Sun, Sep 21
United Airlines Logo
10:10 am - 6:13 pmBWI-SUX
9h 03m1 stop
United Airlines Logo
7:49 am - 1:48 pmSUX-BWI
4h 59m1 stop
$385United Airlines
Find Deal
Fri, Sep 12 - Fri, Sep 19
United Airlines Logo
6:40 pm - 10:57 pmIAD-SUX
5h 17m1 stop
United Airlines Logo
6:48 pm - 5:22 amSUX-IAD
9h 34m1 stop
$423United Airlines
Find Deal
Fri, Sep 12 - Fri, Sep 19
United Airlines Logo
7:00 pm - 10:57 pmDCA-SUX
4h 57m1 stop
United Airlines Logo
7:49 am - 2:16 pmSUX-DCA
5h 27m1 stop
$429United Airlines
Find Deal
Fri, Sep 12 - Fri, Sep 19
United Airlines Logo
6:40 pm - 10:57 pmBWI-SUX
5h 17m1 stop
United Airlines Logo
6:48 pm - 7:12 pmSUX-BWI
23h 24m1 stop
$477United Airlines
Find Deal
Fri, Sep 12 - Fri, Sep 19
United Airlines Logo
10:08 pm - 6:13 pmIAD-SUX
21h 05m2 stops
United Airlines Logo
6:48 pm - 5:22 amSUX-IAD
9h 34m1 stop
$512United Airlines
Find Deal
Sat, Sep 13 - Sat, Sep 20
United Airlines Logo
5:00 pm - 10:57 pmDCA-SUX
6h 57m1 stop
United Airlines Logo
6:48 pm - 8:21 amSUX-DCA
12h 33m2 stops
$517United Airlines
Find Deal
Fri, Sep 12 - Fri, Sep 19
United Airlines Logo
5:00 pm - 10:57 pmDCA-SUX
6h 57m1 stop
United Airlines Logo
6:48 pm - 9:20 amSUX-DCA
13h 32m2 stops
$524United Airlines
Find Deal
Wed, Sep 17 - Sun, Sep 21
United Airlines Logo
12:52 pm - 10:57 pmIAD-SUX
11h 05m2 stops
United Airlines Logo
6:48 pm - 5:22 amSUX-IAD
9h 34m1 stop
$537United Airlines
Find Deal
Fri, Sep 12 - Fri, Sep 19
United Airlines Logo
5:00 pm - 10:57 pmDCA-SUX
6h 57m1 stop
United Airlines Logo
6:48 pm - 10:28 amSUX-DCA
14h 40m2 stops
$540United Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Washington, D.C. to Sioux City flights

Get data-powered insights and trends into flights from Washington, D.C. to Sioux City to help you find the cheapest flights, the best time to fly and much more.

What is the most popular layover airport when flying from Washington, D.C. to Sioux City?

Percentage of 1-stop round-trip flights from Washington, D.C. to Sioux City chosen by KAYAK users via each layover airport in the last 12 months (only includes trips with the same layover airport on both legs).

Chicago (ORD) is the top choice – 86% of KAYAK users who clicked on 1-stop flights from Washington, D.C. to Sioux City picked an itinerary connecting there.

What is the cheapest layover airport when flying from Washington, D.C. to Sioux City?

Average round-trip price for 1-stop flights from Washington, D.C. to Sioux City clicked by KAYAK users in the last 12 months (only includes trips with the same layover airport on both legs).

Flights via Chicago (ORD) offer the most affordable fares, with an average round-trip price of $404.

Which layover airport offers the shortest total travel time from Washington, D.C. to Sioux City?

Shortest average total travel time for 1-stop one-way flights from Washington, D.C. to Sioux City via different layover airports, based on KAYAK user data from the last 12 months.

Consider flying via Chicago (ORD) for the shortest journey. The average one-way travel time for flights connecting there is 5h 37m.

Which layover airport has the quickest connection when flying from Washington, D.C. to Sioux City?

Average layover duration at different layover airports for 1-stop one-way flights from Washington, D.C. to Sioux City, based on KAYAK user data from the last 12 months.

If you prefer a quick connection, Denver (DEN) often has the shortest layovers from Washington, D.C. to Sioux City, with an average of 1h 45m.

Good to know

Cheapest flight$337
Flight from Reagan Washington National Airport to Sioux City

When to book flights from Washington, D.C. to Sioux City

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Sioux City based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Washington, D.C. to Sioux City

  • What is the cheapest flight from Washington, D.C. to Sioux City?

    In the last 3 days, the lowest price for a flight from Washington, D.C. to Sioux City was $337 for a round-trip ticket.

  • Do I need a passport to fly between Washington, D.C. and Sioux City?

    No, a passport isn't needed to fly from Washington, D.C. to Sioux City. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Washington, D.C. to Sioux City?

    When flying out of Washington, D.C. you will be using one of these airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. You will be landing at Sioux City Sioux Gateway.

  • Which aircraft models fly most regularly from Washington, D.C. to Sioux City?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Washington, D.C. to Sioux City?

    Star Alliance is the only airline alliance operating flights between Washington, D.C. and Sioux City.

  • How does KAYAK find such low prices on flights from Washington, D.C. to Sioux City?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington, D.C. to Sioux City.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Sioux City?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sioux City from Washington, D.C. is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington, D.C. to Sioux City?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sioux City with an airline and back to Washington, D.C. with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Sioux City?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sioux City from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Washington, D.C. to Sioux City

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Sioux City. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Washington, D.C. to Sioux City? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 8896 reviews
8.1Crew
7.7Boarding
7.1Entertainment
7.3Comfort
6.6Food
Airline reviews

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

8.0 ExcellentHal, Jul 2025IAD - MSY
Read more United Airlines reviews

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

Weather delay in Chicago?. No sense of urgency to make connection in Chicago for our connecting flight that wasn't delayed. Connection was missed.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

It was great, I’m very grateful for the pilots and crew flight attendants for everything.

We were given vouchers we couldn’t use with a 5.5 hour delay

I fly UAL 7-8 times per year. This flight was not up to snuff because it boarded very late "due to unexpected delays in restocking the plane" and yet Flight Aware showed the plane had landed some 10 hours earlier--so I think they could have planned accordingly. The FA's were nice but harried. The video system had to be rebooted 3-4 times. The food service was rather abrupt; they forgot my row and when I asked for my meal, they brought it with some impatience. Overall, the flight was fine, but the little details made it feel somewhat mundane and hurried.

Flight was great. Efficient boarding. Short flight. Early arrival. Friendly flight crew. The entertainment system did not work well. Could not access it until the aircraft reached 10K feet or more. Lots of glitches.

I didn’t get on plane. Passport being processed by consulate with visa application. Tried to cancel through underpricer after purchasing cacelling for any reason. No dice, they are thieves.

When I booked it on Kayak it aaid that I wasn't allowed hamd luggage. I called United Airlines and it took them 6 minutes to figure out if I was allowed free hand luggage. Surely something that simple they should be able to tell me instantly.

Everything you need to know for your flight from Washington, D.C. to Sioux City

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