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Cheap flights from Washington, D.C. Reagan-National Airport to Sioux City from $344

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Reagan-National Airport to Sioux City departing on 1/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. Reagan-National Airport to Sioux City

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
12:00 pm - 5:28 pm
DCA
-
SUX
6h 28m1 stop
United Airlines Logo
12:45 pm - 9:00 pm
SUX
-
DCA
7h 15m1 stop
$344United Airlines
Tue, Jan 20 - Sat, Jan 24
United Airlines Logo
10:30 am - 5:28 pm
DCA
-
SUX
7h 58m1 stop
United Airlines Logo
12:45 pm - 2:39 pm
SUX
-
DCA
24h 54m2 stops
$498United Airlines
Tue, Jan 20 - Sat, Jan 24

United Airlines flights from Washington, D.C. Reagan-National Airport to Sioux City

Our best United Airlines deals on Washington, D.C. Reagan-National Airport to Sioux City flight tickets
United Airlines
Jan 20
DCA12:00 pmWashington, D.C. Reagan-National
6h 28m
1 stop
SUX5:28 pmSioux City Sioux Gateway
Jan 24
SUX12:45 pmSioux City Sioux Gateway
7h 15m
1 stop
DCA9:00 pmWashington, D.C. Reagan-National
$344
Find similar
United Airlines
Jan 20
DCA10:30 amWashington, D.C. Reagan-National
7h 58m
1 stop
SUX5:28 pmSioux City Sioux Gateway
Jan 24
SUX12:45 pmSioux City Sioux Gateway
24h 54m
2 stops
DCA2:39 pmWashington, D.C. Reagan-National
$498
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Reagan-National Airport 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, momondo users made 832,500 searches. Data last updated December 18, 2025.
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

Fly to

Route

Depart

Return

Price

Washington, D.C.Sioux City

DCA - SUX

DCASUX

Washington, D.C. Reagan-National

Tue 1/20

12:00 pm-5:28 pm

1 stop6h 28m

Sioux City Sioux Gateway

Sat 1/24

12:45 pm-9:00 pm

1 stop7h 15m

$344

Washington, D.C.Sioux City

DCA - SUX

DCASUX

Washington, D.C. Reagan-National

Tue 1/20

10:30 am-5:28 pm

1 stop7h 58m

Sioux City Sioux Gateway

Sat 1/24

12:45 pm-2:39 pm

2 stops24h 54m

$498

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Sioux City from

How to get the cheapest flight ticket from Washington, D.C. Reagan-National Airport to Sioux City

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Sioux City?

On average, the least expensive day to fly to Sioux City from Washington, D.C. Reagan-National Airport is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $354. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Thursday is the most expensive day to depart from Washington, D.C. Reagan-National Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $659.

What is the cheapest time of day to depart on your flight to Sioux City?

The cheapest time of day to fly to Sioux City is in the evening when flights can be purchased for as low as $421. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $743 on average. Flights to Sioux City from Washington, D.C. Reagan-National Airport in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from Washington, D.C. Reagan-National Airport to Sioux City

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Reagan-National Airport to Sioux City according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Reagan-National Airport to Sioux City (DCA to SUX) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Reagan-National Airport to Sioux City

Fastest flight time

5h 28m

Direct flights

None
The fastest flight from Washington, D.C. Reagan-National Airport to Sioux City takes 5h 28m
There are no direct flights from Washington, D.C. Reagan-National Airport to Sioux City. There are no popular flight routes from Washington, D.C. Reagan-National Airport to Sioux City.
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  • How far is Washington, D.C. Reagan-National to Sioux City Sioux Gateway by plane?

    The straight-line distance from Washington, D.C. Reagan-National to Sioux City Sioux Gateway is 1042.2 mi. In terms of flight time, this usually takes a little over 5h 28m.

  • When did momondo last update prices for flights from Washington, D.C. Reagan-National Airport to Sioux City Sioux Gateway Airport?

    Prices for flights from Washington, D.C. Reagan-National Airport to Sioux City Sioux Gateway Airport were last updated today.

  • How old do you have to be to fly from Washington, D.C. Reagan-National Airport to Sioux City Sioux Gateway Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. Reagan-National Airport to Sioux City Sioux Gateway Airport.

  • What documentation or ID do you need to fly to Sioux City Sioux Gateway Airport?

    The required travel and health documents for your Sioux City Sioux Gateway Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Sioux City Sioux Gateway Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near Sioux City?

Book flights to Sioux City if you plan to visit one of these locations
Norfolk

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Sioux City?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to Sioux City for you.

Can I find flights from Washington, D.C. to Sioux City with flexible booking policies on momondo?

momondo does allow users to show only those flights to Sioux City from Washington, D.C. which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Washington, D.C. to Sioux City?

Once all potential Washington, D.C. to Sioux City flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Washington, D.C. to Sioux City right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Washington, D.C. to Sioux City flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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