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Cheap flights from Seattle to Sioux City from $372

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Sioux City departing on 5/2. 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
1 adult, Economy, 0 bags

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Find the cheapest flights from Seattle to Sioux City

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
7:00 am - 6:06 pm
SEA
-
SUX
9h 06m
1 stop
United Airlines Logo
12:55 pm - 7:00 pm
SUX
-
SEA
8h 05m
1 stop
$372United Airlines
Sat, May 2 - Tue, May 5
United Airlines Logo
7:00 am - 6:06 pm
SEA
-
SUX
9h 06m
1 stop
United Airlines Logo
6:00 am - 2:36 pm
SUX
-
SEA
10h 36m
2 stops
$382United Airlines
Sat, May 2 - Tue, May 5
United Airlines Logo
7:00 am - 6:06 pm
SEA
-
SUX
9h 06m
1 stop
United Airlines Logo
12:55 pm - 7:00 pm
SUX
-
SEA
8h 05m
1 stop
$392United Airlines
Sat, May 2 - Tue, May 5
United Airlines Logo
7:00 am - 6:06 pm
SEA
-
SUX
9h 06m
1 stop
United Airlines Logo
6:00 am - 2:36 pm
SUX
-
SEA
10h 36m
2 stops
$402United Airlines
Sat, May 2 - Tue, May 5
United Airlines Logo
7:00 am - 6:06 pm
SEA
-
SUX
9h 06m
1 stop
United Airlines Logo
12:55 pm - 7:00 pm
SUX
-
SEA
8h 05m
1 stop
$427United Airlines
Sat, May 2 - Tue, May 5
United Airlines Logo
7:00 am - 6:06 pm
SEA
-
SUX
9h 06m
1 stop
United Airlines Logo
6:00 am - 3:51 pm
SUX
-
SEA
11h 51m
2 stops
$437United Airlines
Sat, May 2 - Tue, May 5
United Airlines Logo
7:00 am - 5:56 pm
SEA
-
SUX
8h 56m
1 stop
United Airlines Logo
12:55 pm - 7:00 pm
SUX
-
SEA
8h 05m
1 stop
$443United Airlines
Sat, Apr 25 - Tue, Apr 28
United Airlines Logo
7:00 am - 5:56 pm
SEA
-
SUX
8h 56m
1 stop
United Airlines Logo
12:55 pm - 11:27 pm
SUX
-
SEA
12h 32m
2 stops
$453United Airlines
Sat, Apr 25 - Tue, Apr 28
United Airlines Logo
5:25 pm - 10:41 am
SEA
-
SUX
15h 16m
2 stops
United Airlines Logo
6:00 am - 3:51 pm
SUX
-
SEA
11h 51m
2 stops
$476United Airlines
Sat, May 2 - Tue, May 5
United Airlines Logo
5:25 pm - 11:32 pm
SEA
-
SUX
28h 07m
2 stops
United Airlines Logo
6:00 am - 2:36 pm
SUX
-
SEA
10h 36m
2 stops
$486United Airlines
Sat, May 2 - Tue, May 5

United Airlines flights from Seattle to Sioux City

Our best United Airlines deals on Seattle to Sioux City flight tickets
United Airlines
May 2
SEA7:00 amSeattle/Tacoma Intl
9h 06m
1 stop
SUX6:06 pmSioux City Sioux Gateway
May 5
SUX12:55 pmSioux City Sioux Gateway
8h 05m
1 stop
SEA7:00 pmSeattle/Tacoma Intl
$372
United Airlines
May 2
SEA7:00 amSeattle/Tacoma Intl
9h 06m
1 stop
SUX6:06 pmSioux City Sioux Gateway
May 5
SUX6:00 amSioux City Sioux Gateway
10h 36m
2 stops
SEA2:36 pmSeattle/Tacoma Intl
$382
United Airlines
May 2
SEA7:00 amSeattle/Tacoma Intl
9h 06m
1 stop
SUX6:06 pmSioux City Sioux Gateway
May 5
SUX12:55 pmSioux City Sioux Gateway
8h 05m
1 stop
SEA7:00 pmSeattle/Tacoma Intl
$392

momondo Fare Finder

 
Customize your flight search to find flights from Seattle 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 April 11, 2026.
Use the filters below to find and compare flights from Seattle to Sioux City that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Sat 5/2

7:00 am-6:06 pm

1 stop9h 06m

Sioux City Sioux Gateway

Tue 5/5

12:55 pm-7:00 pm

1 stop8h 05m

$372

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Sat 5/2

7:00 am-6:06 pm

1 stop9h 06m

Sioux City Sioux Gateway

Tue 5/5

6:00 am-2:36 pm

2 stops10h 36m

$382

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Sat 5/2

7:00 am-6:06 pm

1 stop9h 06m

Sioux City Sioux Gateway

Tue 5/5

12:55 pm-7:00 pm

1 stop8h 05m

$392

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Sat 5/2

7:00 am-6:06 pm

1 stop9h 06m

Sioux City Sioux Gateway

Tue 5/5

6:00 am-2:36 pm

2 stops10h 36m

$402

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Sat 5/2

7:00 am-6:06 pm

1 stop9h 06m

Sioux City Sioux Gateway

Tue 5/5

12:55 pm-7:00 pm

1 stop8h 05m

$427

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Sat 5/2

7:00 am-6:06 pm

1 stop9h 06m

Sioux City Sioux Gateway

Tue 5/5

6:00 am-3:51 pm

2 stops11h 51m

$437
Quickest round-trip

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Sat 4/25

7:00 am-5:56 pm

1 stop8h 56m

Sioux City Sioux Gateway

Tue 4/28

12:55 pm-7:00 pm

1 stop8h 05m

$443

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Sat 4/25

7:00 am-5:56 pm

1 stop8h 56m

Sioux City Sioux Gateway

Tue 4/28

12:55 pm-11:27 pm

2 stops12h 32m

$453

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Sat 5/2

5:25 pm-10:41 am

2 stops15h 16m

Sioux City Sioux Gateway

Tue 5/5

6:00 am-3:51 pm

2 stops11h 51m

$476

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Sat 5/2

5:25 pm-11:32 pm

2 stops28h 07m

Sioux City Sioux Gateway

Tue 5/5

6:00 am-2:36 pm

2 stops10h 36m

$486

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
1
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See travel insights to Sioux City from

How to get the cheapest flight ticket from Seattle 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 Seattle/Tacoma Intl to Sioux City Sioux Gateway?

United Airlines is the most popular carrier operating from Seattle/Tacoma Intl to Sioux City Sioux Gateway

What airlines fly to Sioux City?

Alaska Airlines, United Airlines and American Airlines are the top three most popular airlines that fly to Sioux City from Seattle according to our data. Alaska Airlines is the first choice among our users, with 52% 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.

When to book flights from Seattle to Sioux City

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

Cheap Seattle to Sioux City (SEA to SUX) flight deals and tips

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

Fastest flight time

5h 56m

Direct flights

None
The fastest flight from Seattle to Sioux City takes 5h 56m
There are no direct flights from Seattle to Sioux City. There are no popular flight routes from Seattle to Sioux City.
Search flight deals

Frequently asked questions about flying from Seattle to Sioux City

  • How far is Seattle/Tacoma Intl to Sioux City Sioux Gateway by plane?

    Sioux City Sioux Gateway is 1306.6 mi away from Seattle/Tacoma Intl. Typically, this will take 5h 56m by plane in normal conditions.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Sioux City Sioux Gateway Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Sioux City Sioux Gateway Airport are updated daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Sioux City Sioux Gateway Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Sioux City Sioux Gateway Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport 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 you'll need for your trip to Sioux City Sioux Gateway Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sioux City Sioux Gateway Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Seattle to Sioux City?

Best airlines flying from Seattle to Sioux City

Compare and see reviews for airlines that fly from Seattle to Sioux City with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $253Free CancellationRating
7.4
9,569 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 Seattle to Sioux City?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Sioux City. Millions of users trust and use momondo every year so you are in good hands.

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

Flights from Seattle to Sioux City with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Sioux City.

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

If you are simply researching potential flights to Sioux City, momondo offers a useful price alert feature which will track prices for flights to Sioux City from Seattle and alert you when they change.

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