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Cheap flights from Seattle to Sioux City from $325

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Sioux City departing on 8/19. 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

Discover deals from 900+ travel sites with momondo.

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
3:54 pm - 11:43 pm
SEA
-
SUX
5h 49m
1 stop
United Airlines Logo
7:45 am - 4:07 pm
SUX
-
SEA
10h 22m
1 stop
$350United Airlines
Fri, Aug 21 - Mon, Aug 24
United Airlines Logo
8:30 am - 6:11 pm
SEA
-
SUX
7h 41m
1 stop
United Airlines Logo
6:46 pm - 10:59 pm
SUX
-
SEA
6h 13m
1 stop
$355United Airlines
Sat, Oct 31 - Wed, Nov 4
United Airlines Logo
8:30 am - 6:11 pm
SEA
-
SUX
7h 41m
1 stop
United Airlines Logo
6:46 pm - 10:59 pm
SUX
-
SEA
6h 13m
1 stop
$404United Airlines
Sat, Oct 31 - Wed, Nov 4
United Airlines Logo
2:34 pm - 11:43 pm
SEA
-
SUX
7h 09m
1 stop
United Airlines Logo
11:30 am - 9:51 pm
SUX
-
SEA
12h 21m
2 stops
$411United Airlines
Fri, Aug 21 - Mon, Aug 24
United Airlines Logo
5:00 am - 10:55 am
SEA
-
SUX
27h 55m
1 stop
United Airlines Logo
11:30 am - 3:52 pm
SUX
-
SEA
6h 22m
1 stop
$442United Airlines
Tue, Aug 25 - Wed, Sep 2
United Airlines Logo
3:30 pm - 10:55 am
SEA
-
SUX
17h 25m
2 stops
United Airlines Logo
11:30 am - 3:52 pm
SUX
-
SEA
6h 22m
1 stop
$452United Airlines
Tue, Aug 25 - Wed, Sep 2
United Airlines Logo
5:20 pm - 10:55 am
SEA
-
SUX
15h 35m
2 stops
United Airlines Logo
11:30 am - 9:58 pm
SUX
-
SEA
12h 28m
2 stops
$457United Airlines
Tue, Aug 25 - Wed, Sep 2
United Airlines Logo
5:00 am - 6:11 pm
SEA
-
SUX
11h 11m
2 stops
United Airlines Logo
6:46 pm - 10:59 pm
SUX
-
SEA
6h 13m
1 stop
$467United Airlines
Sat, Oct 31 - Wed, Nov 4
United Airlines Logo
8:30 am - 6:11 pm
SEA
-
SUX
7h 41m
1 stop
United Airlines Logo
9:03 am - 8:10 pm
SUX
-
SEA
13h 07m
2 stops
$470United Airlines
Sat, Oct 31 - Wed, Nov 4
United Airlines Logo
6:51 pm - 6:11 pm
SEA
-
SUX
21h 20m
2 stops
United Airlines Logo
6:46 pm - 10:59 pm
SUX
-
SEA
6h 13m
1 stop
$507United Airlines
Tue, Oct 27 - Sat, Oct 31

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United Airlines flights from Seattle to Sioux City

Our best United Airlines deals on Seattle to Sioux City flight tickets
United Airlines
Aug 21
SEA3:54 pmSeattle/Tacoma Intl
5h 49m
1 stop
SUX11:43 pmSioux City Sioux Gateway
Aug 24
SUX7:45 amSioux City Sioux Gateway
10h 22m
1 stop
SEA4:07 pmSeattle/Tacoma Intl
$350
United Airlines
Oct 31
SEA8:30 amSeattle/Tacoma Intl
7h 41m
1 stop
SUX6:11 pmSioux City Sioux Gateway
Nov 4
SUX6:46 pmSioux City Sioux Gateway
6h 13m
1 stop
SEA10:59 pmSeattle/Tacoma Intl
$355
United Airlines
Oct 31
SEA8:30 amSeattle/Tacoma Intl
7h 41m
1 stop
SUX6:11 pmSioux City Sioux Gateway
Nov 4
SUX6:46 pmSioux City Sioux Gateway
6h 13m
1 stop
SEA10:59 pmSeattle/Tacoma Intl
$404

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 June 14, 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

Fri 8/21

3:54 pm-11:43 pm

1 stop5h 49m

Sioux City Sioux Gateway

Mon 8/24

7:45 am-4:07 pm

1 stop10h 22m

$350
Quickest round-trip

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Sat 10/31

8:30 am-6:11 pm

1 stop7h 41m

Sioux City Sioux Gateway

Wed 11/4

6:46 pm-10:59 pm

1 stop6h 13m

$355

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Sat 10/31

8:30 am-6:11 pm

1 stop7h 41m

Sioux City Sioux Gateway

Wed 11/4

6:46 pm-10:59 pm

1 stop6h 13m

$404

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Fri 8/21

2:34 pm-11:43 pm

1 stop7h 09m

Sioux City Sioux Gateway

Mon 8/24

11:30 am-9:51 pm

2 stops12h 21m

$411

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Tue 8/25

5:00 am-10:55 am

1 stop27h 55m

Sioux City Sioux Gateway

Wed 9/2

11:30 am-3:52 pm

1 stop6h 22m

$442

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Tue 8/25

3:30 pm-10:55 am

2 stops17h 25m

Sioux City Sioux Gateway

Wed 9/2

11:30 am-3:52 pm

1 stop6h 22m

$452

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Tue 8/25

5:20 pm-10:55 am

2 stops15h 35m

Sioux City Sioux Gateway

Wed 9/2

11:30 am-9:58 pm

2 stops12h 28m

$457

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Sat 10/31

5:00 am-6:11 pm

2 stops11h 11m

Sioux City Sioux Gateway

Wed 11/4

6:46 pm-10:59 pm

1 stop6h 13m

$467

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Sat 10/31

8:30 am-6:11 pm

1 stop7h 41m

Sioux City Sioux Gateway

Wed 11/4

9:03 am-8:10 pm

2 stops13h 07m

$470

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Tue 10/27

6:51 pm-6:11 pm

2 stops21h 20m

Sioux City Sioux Gateway

Sat 10/31

6:46 pm-10:59 pm

1 stop6h 13m

$507

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 53% 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

7h 41m

Direct flights

None
The fastest flight from Seattle to Sioux City takes 7h 41m
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 7h 41m 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
9,818 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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