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Cheap flights from Seattle to Sioux City from $109

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 1/28. 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 Seattle to Sioux City

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
7:00 am - 5:28 pm
SEA
-
SUX
8h 28m1 stop
United Airlines Logo
6:00 am - 9:55 am
SUX
-
SEA
5h 55m1 stop
$232United Airlines
Tue, Jan 27 - Thu, Feb 5
United Airlines Logo
3:30 pm - 11:47 pm
SEA
-
SUX
6h 17m1 stop
United Airlines Logo
6:00 am - 3:44 pm
SUX
-
SEA
11h 44m2 stops
$237United Airlines
Tue, Jan 27 - Thu, Feb 5
United Airlines Logo
5:00 am - 5:28 pm
SEA
-
SUX
10h 28m2 stops
United Airlines Logo
6:00 am - 3:44 pm
SUX
-
SEA
11h 44m2 stops
$247United Airlines
Tue, Jan 27 - Thu, Feb 5
United Airlines Logo
7:00 am - 5:28 pm
SEA
-
SUX
8h 28m1 stop
United Airlines Logo
12:45 pm - 6:14 pm
SUX
-
SEA
7h 29m1 stop
$302United Airlines
Tue, Jan 20 - Sat, Jan 24
United Airlines Logo
7:00 am - 5:28 pm
SEA
-
SUX
8h 28m1 stop
United Airlines Logo
12:45 pm - 9:15 pm
SUX
-
SEA
10h 30m2 stops
$312United Airlines
Tue, Jan 20 - Sat, Jan 24
United Airlines Logo
12:35 pm - 11:47 pm
SEA
-
SUX
9h 12m2 stops
United Airlines Logo
12:45 pm - 9:15 pm
SUX
-
SEA
10h 30m2 stops
$317United Airlines
Tue, Jan 20 - Sat, Jan 24
United Airlines Logo
3:48 pm - 11:44 pm
SEA
-
SUX
5h 56m1 stop
United Airlines Logo
12:55 pm - 7:00 pm
SUX
-
SEA
8h 05m1 stop
$354United Airlines
Wed, Apr 22 - Mon, Apr 27
United Airlines Logo
7:10 pm - 10:45 am
SEA
-
SUX
13h 35m1 stop
United Airlines Logo
12:53 pm - 7:03 pm
SUX
-
SEA
8h 10m1 stop
$361United Airlines
Fri, Mar 6 - Tue, Mar 10
United Airlines Logo
8:57 am - 6:13 pm
SEA
-
SUX
7h 16m1 stop
United Airlines Logo
6:00 am - 9:55 am
SUX
-
SEA
5h 55m1 stop
$363United Airlines
Sat, Jan 3 - Wed, Jan 7
United Airlines Logo
8:45 am - 11:44 pm
SEA
-
SUX
12h 59m2 stops
United Airlines Logo
12:55 pm - 7:00 pm
SUX
-
SEA
8h 05m1 stop
$364United Airlines
Wed, Apr 22 - Mon, Apr 27

United Airlines flights from Seattle to Sioux City

Our best United Airlines deals on Seattle to Sioux City flight tickets
United Airlines
Jan 27
SEA7:00 amSeattle/Tacoma Intl
8h 28m
1 stop
SUX5:28 pmSioux City Sioux Gateway
Feb 5
SUX6:00 amSioux City Sioux Gateway
5h 55m
1 stop
SEA9:55 amSeattle/Tacoma Intl
$232
Find similar
United Airlines
Jan 27
SEA3:30 pmSeattle/Tacoma Intl
6h 17m
1 stop
SUX11:47 pmSioux City Sioux Gateway
Feb 5
SUX6:00 amSioux City Sioux Gateway
11h 44m
2 stops
SEA3:44 pmSeattle/Tacoma Intl
$237
Find similar
United Airlines
Jan 27
SEA5:00 amSeattle/Tacoma Intl
10h 28m
2 stops
SUX5:28 pmSioux City Sioux Gateway
Feb 5
SUX6:00 amSioux City Sioux Gateway
11h 44m
2 stops
SEA3:44 pmSeattle/Tacoma Intl
$247
Find similar

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 December 20, 2025.
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

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Tue 1/27

7:00 am-5:28 pm

1 stop8h 28m

Sioux City Sioux Gateway

Thu 2/5

6:00 am-9:55 am

1 stop5h 55m

$232

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Tue 1/27

3:30 pm-11:47 pm

1 stop6h 17m

Sioux City Sioux Gateway

Thu 2/5

6:00 am-3:44 pm

2 stops11h 44m

$237

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Tue 1/27

5:00 am-5:28 pm

2 stops10h 28m

Sioux City Sioux Gateway

Thu 2/5

6:00 am-3:44 pm

2 stops11h 44m

$247

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Tue 1/20

7:00 am-5:28 pm

1 stop8h 28m

Sioux City Sioux Gateway

Sat 1/24

12:45 pm-6:14 pm

1 stop7h 29m

$302

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Tue 1/20

7:00 am-5:28 pm

1 stop8h 28m

Sioux City Sioux Gateway

Sat 1/24

12:45 pm-9:15 pm

2 stops10h 30m

$312

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Tue 1/20

12:35 pm-11:47 pm

2 stops9h 12m

Sioux City Sioux Gateway

Sat 1/24

12:45 pm-9:15 pm

2 stops10h 30m

$317

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Wed 4/22

3:48 pm-11:44 pm

1 stop5h 56m

Sioux City Sioux Gateway

Mon 4/27

12:55 pm-7:00 pm

1 stop8h 05m

$354

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Fri 3/6

7:10 pm-10:45 am

1 stop13h 35m

Sioux City Sioux Gateway

Tue 3/10

12:53 pm-7:03 pm

1 stop8h 10m

$361

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Sat 1/3

8:57 am-6:13 pm

1 stop7h 16m

Sioux City Sioux Gateway

Wed 1/7

6:00 am-9:55 am

1 stop5h 55m

$363

SeattleSioux City

SEA - SUX

SEASUX

Seattle/Tacoma Intl

Wed 4/22

8:45 am-11:44 pm

2 stops12h 59m

Sioux City Sioux Gateway

Mon 4/27

12:55 pm-7:00 pm

1 stop8h 05m

$364

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
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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 day to depart on your flight to Sioux City?

On average, the least expensive day to fly to Sioux City from Seattle is on a Thursday. momondo users have found tickets for Thursday departures for as low as $461. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Wednesday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $493.

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 58m

Direct flights

None
The fastest flight from Seattle to Sioux City takes 5h 58m
There are no direct flights from Seattle to Sioux City. There are no popular flight routes from Seattle to Sioux City.
Search flight deals

  • 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 58m 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
9,095 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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