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

Prices for flights from Sioux City Sioux Gateway Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Sioux City Sioux Gateway Airport to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$334 Cheap Flights from Sioux City to Seattle in 2026

Find the cheapest flights from Sioux City to Seattle

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:58 pm - 10:59 pm

SUX

SEA

6h 01m

1 stop

3:55 pm - 11:43 pm

SEA

SUX

5h 48m

1 stop

$354United Airlines

Fri, Sep 25 - Sat, Oct 3

6:58 pm - 10:59 pm

SUX

SEA

6h 01m

1 stop

9:05 am - 11:43 pm

SEA

SUX

12h 38m

2 stops

$355United Airlines

Fri, Sep 25 - Sat, Oct 3

6:58 pm - 6:44 pm

SUX

SEA

25h 46m

2 stops

1:22 pm - 11:43 pm

SEA

SUX

8h 21m

2 stops

$522United Airlines

Fri, Sep 25 - Sat, Oct 3

6:58 pm - 10:59 pm

SUX

SEA

6h 01m

1 stop

7:00 am - 5:53 pm

SEA

SUX

8h 53m

1 stop

$533United Airlines

Thu, Oct 8 - Mon, Oct 12

6:58 pm - 10:59 pm

SUX

SEA

6h 01m

1 stop

6:43 pm - 11:43 pm

SEA

SUX

27h 00m

2 stops

$575United Airlines

Thu, Oct 8 - Mon, Oct 12

11:30 am - 6:29 pm

SUX

SEA

8h 59m

2 stops

5:20 pm - 10:55 am

SEA

SUX

15h 35m

2 stops

$655United Airlines

Tue, Aug 11 - Sat, Aug 15

6:35 pm - 11:10 pm

SUX

SEA

6h 35m

1 stop

6:15 pm - 11:43 pm

SEA

SUX

27h 28m

1 stop

$699United Airlines

Sun, Aug 9 - Thu, Aug 13

6:35 pm - 11:10 pm

SUX

SEA

6h 35m

1 stop

3:30 pm - 10:55 am

SEA

SUX

17h 25m

2 stops

$709United Airlines

Sun, Aug 9 - Thu, Aug 13

6:58 pm - 10:59 pm

SUX

SEA

6h 01m

1 stop

3:18 pm - 11:43 pm

SEA

SUX

30h 25m

3 stops

$725United Airlines

Thu, Oct 8 - Mon, Oct 12

6:58 pm - 10:59 pm

SUX

SEA

6h 01m

1 stop

3:18 pm - 11:43 pm

SEA

SUX

30h 25m

3 stops

$745United Airlines

Thu, Oct 8 - Mon, Oct 12

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

United Airlines flights from Sioux City to Seattle

Our best United Airlines deals on Sioux City to Seattle flight tickets

United Airlines

Sep 25

SUX6:58 pmSioux City Sioux Gateway

6h 01m

1 stop

SEA10:59 pmSeattle/Tacoma Intl

Oct 3

SEA3:55 pmSeattle/Tacoma Intl

5h 48m

1 stop

SUX11:43 pmSioux City Sioux Gateway

$354

United Airlines

Sep 25

SUX6:58 pmSioux City Sioux Gateway

6h 01m

1 stop

SEA10:59 pmSeattle/Tacoma Intl

Oct 3

SEA9:05 amSeattle/Tacoma Intl

12h 38m

2 stops

SUX11:43 pmSioux City Sioux Gateway

$355

United Airlines

Sep 25

SUX6:58 pmSioux City Sioux Gateway

25h 46m

2 stops

SEA6:44 pmSeattle/Tacoma Intl

Oct 3

SEA1:22 pmSeattle/Tacoma Intl

8h 21m

2 stops

SUX11:43 pmSioux City Sioux Gateway

$522

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Fri 9/25

6:58 pm-10:59 pm

1 stop6h 01m

Seattle/Tacoma Intl

Sat 10/3

3:55 pm-11:43 pm

1 stop5h 48m

$354

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Fri 9/25

6:58 pm-10:59 pm

1 stop6h 01m

Seattle/Tacoma Intl

Sat 10/3

9:05 am-11:43 pm

2 stops12h 38m

$355

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Fri 9/25

6:58 pm-6:44 pm

2 stops25h 46m

Seattle/Tacoma Intl

Sat 10/3

1:22 pm-11:43 pm

2 stops8h 21m

$522

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Thu 10/8

6:58 pm-10:59 pm

1 stop6h 01m

Seattle/Tacoma Intl

Mon 10/12

7:00 am-5:53 pm

1 stop8h 53m

$533

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Thu 10/8

6:58 pm-10:59 pm

1 stop6h 01m

Seattle/Tacoma Intl

Mon 10/12

6:43 pm-11:43 pm

2 stops27h 00m

$575

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Tue 8/11

11:30 am-6:29 pm

2 stops8h 59m

Seattle/Tacoma Intl

Sat 8/15

5:20 pm-10:55 am

2 stops15h 35m

$655

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sun 8/9

6:35 pm-11:10 pm

1 stop6h 35m

Seattle/Tacoma Intl

Thu 8/13

6:15 pm-11:43 pm

1 stop27h 28m

$699

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sun 8/9

6:35 pm-11:10 pm

1 stop6h 35m

Seattle/Tacoma Intl

Thu 8/13

3:30 pm-10:55 am

2 stops17h 25m

$709

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Thu 10/8

6:58 pm-10:59 pm

1 stop6h 01m

Seattle/Tacoma Intl

Mon 10/12

3:18 pm-11:43 pm

3 stops30h 25m

$725

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Thu 10/8

6:58 pm-10:59 pm

1 stop6h 01m

Seattle/Tacoma Intl

Mon 10/12

3:18 pm-11:43 pm

3 stops30h 25m

$745

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first

How to get the cheapest flight ticket from Sioux City to Seattle

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 Sioux City Sioux Gateway to Seattle/Tacoma Intl?

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

What airlines fly to Seattle?

Alaska Airlines, United Airlines and American Airlines are the top three most popular airlines that fly to Seattle from Sioux City according to our data. Alaska Airlines is the first choice among our users, with 49% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 7 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

When to book flights from Sioux City to Seattle

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

Estimated round-trip price

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

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

Fastest flight time	6h 01m
Direct flights	None

The fastest flight from Sioux City to Seattle takes 6h 01m

There are no direct flights from Sioux City to Seattle. There are no popular flight routes from Sioux City to Seattle.

Search flight deals

Frequently asked questions about flying from Sioux City to Seattle

How far is Sioux City Sioux Gateway to Seattle/Tacoma Intl by plane?
There are 1306.6 mi between Sioux City Sioux Gateway and Seattle/Tacoma Intl. 6h 01m is a normal flight duration for this route.
When did momondo last update prices for flights from Sioux City Sioux Gateway Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Sioux City Sioux Gateway Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.
How old do you have to be to fly from Sioux City Sioux Gateway Airport to Seattle/Tacoma Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Sioux City Sioux Gateway Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Redmond

Kent

Lakewood

Tukwila

Puyallup

Fife

Federal Way

Cle Elum

Marysville

Kirkland

Centralia

Shoreline

Lacey

Why use momondo?

Why should I use momondo to find a flight deal from Sioux City to Seattle?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seattle from Sioux City.

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

Yes. momondo allows you to filter the results for Sioux City to Seattle flights to just show those with flexible booking policies.

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

Once all potential Sioux City to Seattle 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 Sioux City to Seattle right now. Can momondo alert me if prices change?

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