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Cheap flights from Washington to Sioux City from $334

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 to Sioux City departing on 9/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Washington to Sioux City

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
3:51 pm - 11:46 pm
SEA
-
SUX
5h 55m
1 stop
United Airlines Logo
6:30 pm - 11:11 pm
SUX
-
SEA
6h 41m
1 stop
$334United Airlines
Tue, Sep 1 - Tue, Sep 8
United Airlines Logo
10:54 am - 11:46 pm
SEA
-
SUX
10h 52m
2 stops
United Airlines Logo
11:32 am - 3:51 pm
SUX
-
SEA
6h 19m
1 stop
$344United Airlines
Tue, Sep 1 - Tue, Sep 8
United Airlines Logo
12:15 pm - 11:46 pm
SEA
-
SUX
9h 31m
2 stops
United Airlines Logo
11:32 am - 9:56 pm
SUX
-
SEA
12h 24m
2 stops
$349United Airlines
Tue, Sep 1 - Tue, Sep 8
United Airlines Logo
4:15 pm - 11:44 pm
PDX
-
SUX
5h 29m
1 stop
United Airlines Logo
12:55 pm - 6:34 pm
SUX
-
PDX
7h 39m
1 stop
$353United Airlines
Mon, Apr 20 - Mon, Apr 27
United Airlines Logo
12:15 pm - 11:46 pm
SEA
-
SUX
9h 31m
2 stops
United Airlines Logo
11:32 am - 11:24 pm
SUX
-
SEA
13h 52m
2 stops
$365United Airlines
Thu, Aug 20 - Tue, Aug 25
United Airlines Logo
12:15 pm - 11:46 pm
SEA
-
SUX
9h 31m
2 stops
United Airlines Logo
6:30 pm - 11:11 pm
SUX
-
SEA
6h 41m
1 stop
$413United Airlines
Thu, Aug 20 - Tue, Aug 25
United Airlines Logo
2:26 pm - 11:46 pm
SEA
-
SUX
7h 20m
1 stop
United Airlines Logo
6:30 pm - 11:11 pm
SUX
-
SEA
6h 41m
1 stop
$424United Airlines
Tue, Sep 15 - Sat, Sep 19
United Airlines Logo
4:15 pm - 11:44 pm
PDX
-
SUX
5h 29m
1 stop
United Airlines Logo
12:55 pm - 12:41 am
SUX
-
PDX
13h 46m
2 stops
$432United Airlines
Mon, Apr 20 - Mon, Apr 27
United Airlines Logo
2:26 pm - 11:46 pm
SEA
-
SUX
7h 20m
1 stop
United Airlines Logo
11:32 am - 11:24 pm
SUX
-
SEA
13h 52m
2 stops
$434United Airlines
Tue, Sep 15 - Sat, Sep 19
United Airlines Logo
7:05 pm - 10:46 am
SEA
-
SUX
13h 41m
1 stop
United Airlines Logo
6:00 am - 9:46 am
SUX
-
SEA
5h 46m
1 stop
$437United Airlines
Wed, Apr 22 - Wed, Apr 29

United Airlines flights from State of Washington to Sioux City

Our best United Airlines deals on State of Washington to Sioux City flight tickets
United Airlines
Sep 1
SEA3:51 pmSeattle/Tacoma Intl
5h 55m
1 stop
SUX11:46 pmSioux City Sioux Gateway
Sep 8
SUX6:30 pmSioux City Sioux Gateway
6h 41m
1 stop
SEA11:11 pmSeattle/Tacoma Intl
$334
United Airlines
Sep 1
SEA10:54 amSeattle/Tacoma Intl
10h 52m
2 stops
SUX11:46 pmSioux City Sioux Gateway
Sep 8
SUX11:32 amSioux City Sioux Gateway
6h 19m
1 stop
SEA3:51 pmSeattle/Tacoma Intl
$344
United Airlines
Sep 1
SEA12:15 pmSeattle/Tacoma Intl
9h 31m
2 stops
SUX11:46 pmSioux City Sioux Gateway
Sep 8
SUX11:32 amSioux City Sioux Gateway
12h 24m
2 stops
SEA9:56 pmSeattle/Tacoma Intl
$349

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington 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 March 23, 2026.
Use the filters below to find and compare flights from Washington to Sioux City that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Tue 9/1

3:51 pm-11:46 pm

1 stop5h 55m

Sioux City Sioux Gateway

Tue 9/8

6:30 pm-11:11 pm

1 stop6h 41m

$334

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Tue 9/1

10:54 am-11:46 pm

2 stops10h 52m

Sioux City Sioux Gateway

Tue 9/8

11:32 am-3:51 pm

1 stop6h 19m

$344

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Tue 9/1

12:15 pm-11:46 pm

2 stops9h 31m

Sioux City Sioux Gateway

Tue 9/8

11:32 am-9:56 pm

2 stops12h 24m

$349

PortlandSioux City

PDX - SUX

PDXSUX

Portland

Mon 4/20

4:15 pm-11:44 pm

1 stop5h 29m

Sioux City Sioux Gateway

Mon 4/27

12:55 pm-6:34 pm

1 stop7h 39m

$353

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Thu 8/20

12:15 pm-11:46 pm

2 stops9h 31m

Sioux City Sioux Gateway

Tue 8/25

11:32 am-11:24 pm

2 stops13h 52m

$365

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Thu 8/20

12:15 pm-11:46 pm

2 stops9h 31m

Sioux City Sioux Gateway

Tue 8/25

6:30 pm-11:11 pm

1 stop6h 41m

$413

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Tue 9/15

2:26 pm-11:46 pm

1 stop7h 20m

Sioux City Sioux Gateway

Sat 9/19

6:30 pm-11:11 pm

1 stop6h 41m

$424

PortlandSioux City

PDX - SUX

PDXSUX

Portland

Mon 4/20

4:15 pm-11:44 pm

1 stop5h 29m

Sioux City Sioux Gateway

Mon 4/27

12:55 pm-12:41 am

2 stops13h 46m

$432

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Tue 9/15

2:26 pm-11:46 pm

1 stop7h 20m

Sioux City Sioux Gateway

Sat 9/19

11:32 am-11:24 pm

2 stops13h 52m

$434

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Wed 4/22

7:05 pm-10:46 am

1 stop13h 41m

Sioux City Sioux Gateway

Wed 4/29

6:00 am-9:46 am

1 stop5h 46m

$437

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Sioux City from

How to get the cheapest flight ticket from State of Washington 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 airline that flies from Washington to Sioux City Sioux Gateway?

United Airlines is the most popular carrier operating from Washington to Sioux City Sioux Gateway

What airlines fly to Sioux City?

Alaska Airlines, United Airlines and Delta are the top three most popular airlines that fly to Sioux City from State of Washington according to our data. Alaska Airlines is the first choice among our users, with 41% of people opting to fly with this airline when traveling to Sioux City. Keep in mind that there are 7 different airlines that fly to Sioux City on a routine basis, so you have a few additional options to choose from.

Cheap State of Washington to Sioux City flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Sioux City

Fastest flight time

5h 55m

Direct flights

None
The fastest flight from State of Washington to Sioux City takes 5h 55m
There are no direct flights from State of Washington to Sioux City. There are no popular flight routes from State of Washington to Sioux City.
Search flight deals

  • When did momondo last update prices for flights from Washington to Sioux City Sioux Gateway Airport?

    Prices for flights from Washington to Sioux City Sioux Gateway Airport are updated daily.

  • How many operators does momondo search for flights from Washington to Sioux City Sioux Gateway Airport?

  • How old do you have to be to fly from Washington 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 to Sioux City Sioux Gateway Airport.

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

    The travel and health documents required for your trip to Sioux City Sioux Gateway Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Sioux City Sioux Gateway Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from State of Washington to Sioux City

Compare and see reviews for airlines that fly from State of Washington to Sioux City with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $253Free CancellationRating
7.4
9,462 reviews
Search United Airlines flights

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 to Sioux City?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington to Sioux City. momondo saves you time and could save you money on your trip.

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

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

How can momondo help me find flights from Washington to Sioux City?

Once you have performed a search for Washington to Sioux City flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Price alerts on flights to Sioux City from Washington are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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