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.

$324 Cheap Flights from Sioux City to Seattle in 2026

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0 bags

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Find the cheapest flights from Sioux City to Seattle

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:10 am - 9:49 am

SUX

SEA

5h 39m

1 stop

3:30 pm - 11:41 pm

SEA

SUX

6h 11m

1 stop

$324United Airlines

Thu, Mar 12 - Mon, Mar 16

6:10 am - 9:49 am

SUX

SEA

5h 39m

1 stop

8:45 am - 11:41 pm

SEA

SUX

12h 56m

2 stops

$334United Airlines

Thu, Mar 12 - Mon, Mar 16

11:32 am - 9:59 pm

SUX

SEA

12h 27m

2 stops

3:40 pm - 11:41 pm

SEA

SUX

6h 01m

1 stop

$400United Airlines

Fri, Jul 24 - Mon, Aug 10

6:10 am - 3:50 pm

SUX

SEA

11h 40m

2 stops

8:45 am - 11:41 pm

SEA

SUX

12h 56m

2 stops

$414United Airlines

Thu, Mar 12 - Mon, Mar 16

6:00 am - 9:46 am

SUX

SEA

5h 46m

1 stop

8:45 am - 11:44 pm

SEA

SUX

12h 59m

2 stops

$482United Airlines

Sat, Apr 11 - Sat, Apr 18

6:00 am - 9:46 am

SUX

SEA

5h 46m

1 stop

3:48 pm - 11:44 pm

SEA

SUX

5h 56m

1 stop

$491United Airlines

Sat, Apr 11 - Sat, Apr 18

6:00 am - 9:46 am

SUX

SEA

5h 46m

1 stop

7:05 pm - 10:41 am

SEA

SUX

13h 36m

1 stop

$495United Airlines

Sun, Apr 26 - Fri, May 1

6:42 pm - 10:59 pm

SUX

SEA

6h 17m

1 stop

2:36 pm - 11:44 pm

SEA

SUX

7h 08m

1 stop

$532United Airlines

Mon, May 18 - Thu, May 21

6:00 am - 9:46 am

SUX

SEA

5h 46m

1 stop

5:25 pm - 10:41 am

SEA

SUX

15h 16m

2 stops

$554United Airlines

Sun, Apr 26 - Fri, May 1

6:00 am - 9:46 am

SUX

SEA

5h 46m

1 stop

6:58 pm - 6:06 pm

SEA

SUX

21h 08m

3 stops

$571United Airlines

Sun, Apr 26 - Fri, May 1

United Airlines flights from Sioux City to Seattle

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

United Airlines

Mar 12

SUX6:10 amSioux City Sioux Gateway

5h 39m

1 stop

SEA9:49 amSeattle/Tacoma Intl

Mar 16

SEA3:30 pmSeattle/Tacoma Intl

6h 11m

1 stop

SUX11:41 pmSioux City Sioux Gateway

$324

United Airlines

Mar 12

SUX6:10 amSioux City Sioux Gateway

5h 39m

1 stop

SEA9:49 amSeattle/Tacoma Intl

Mar 16

SEA8:45 amSeattle/Tacoma Intl

12h 56m

2 stops

SUX11:41 pmSioux City Sioux Gateway

$334

United Airlines

Mar 12

SUX6:10 amSioux City Sioux Gateway

11h 40m

2 stops

SEA3:50 pmSeattle/Tacoma Intl

Mar 16

SEA8:45 amSeattle/Tacoma Intl

12h 56m

2 stops

SUX11:41 pmSioux City Sioux Gateway

$414

Fly from

Fly to

Route

Depart

Return

Price

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Thu 3/12

6:10 am-9:49 am

1 stop5h 39m

Seattle/Tacoma Intl

Mon 3/16

3:30 pm-11:41 pm

1 stop6h 11m

$324

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Thu 3/12

6:10 am-9:49 am

1 stop5h 39m

Seattle/Tacoma Intl

Mon 3/16

8:45 am-11:41 pm

2 stops12h 56m

$334

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Fri 7/24

11:32 am-9:59 pm

2 stops12h 27m

Seattle/Tacoma Intl

Mon 8/10

3:40 pm-11:41 pm

1 stop6h 01m

$400

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Thu 3/12

6:10 am-3:50 pm

2 stops11h 40m

Seattle/Tacoma Intl

Mon 3/16

8:45 am-11:41 pm

2 stops12h 56m

$414

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sat 4/11

6:00 am-9:46 am

1 stop5h 46m

Seattle/Tacoma Intl

Sat 4/18

8:45 am-11:44 pm

2 stops12h 59m

$482

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sat 4/11

6:00 am-9:46 am

1 stop5h 46m

Seattle/Tacoma Intl

Sat 4/18

3:48 pm-11:44 pm

1 stop5h 56m

$491

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sun 4/26

6:00 am-9:46 am

1 stop5h 46m

Seattle/Tacoma Intl

Fri 5/1

7:05 pm-10:41 am

1 stop13h 36m

$495

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Mon 5/18

6:42 pm-10:59 pm

1 stop6h 17m

Seattle/Tacoma Intl

Thu 5/21

2:36 pm-11:44 pm

1 stop7h 08m

$532

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sun 4/26

6:00 am-9:46 am

1 stop5h 46m

Seattle/Tacoma Intl

Fri 5/1

5:25 pm-10:41 am

2 stops15h 16m

$554

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sun 4/26

6:00 am-9:46 am

1 stop5h 46m

Seattle/Tacoma Intl

Fri 5/1

6:58 pm-6:06 pm

3 stops21h 08m

$571

Flights are sorted by cheapest round-trip flights first.

Sorted 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 airlines fly to Seattle?

Alaska Airlines, United Airlines and Hawaiian 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 55% 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	5h 39m
Direct flights	None

The fastest flight from Sioux City to Seattle takes 5h 39m

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

Search flight deals

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. 5h 39m 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.

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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.