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.

$384 Cheap Flights from Sioux City to Seattle in 2026

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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.

6:00 am - 9:46 am

SUX

SEA

5h 46m

1 stop

7:00 am - 5:56 pm

SEA

SUX

8h 56m

1 stop

$384United Airlines

Tue, Apr 21 - Sat, Apr 25

6:00 am - 4:04 pm

SUX

SEA

12h 04m

2 stops

7:00 am - 5:56 pm

SEA

SUX

8h 56m

1 stop

$389United Airlines

Tue, Apr 21 - Sat, Apr 25

12:55 pm - 7:00 pm

SUX

SEA

8h 05m

1 stop

7:00 am - 6:06 pm

SEA

SUX

9h 06m

1 stop

$393United Airlines

Sat, May 2 - Sat, May 9

6:00 am - 2:36 pm

SUX

SEA

10h 36m

2 stops

7:00 am - 6:06 pm

SEA

SUX

9h 06m

1 stop

$403United Airlines

Sat, May 2 - Sat, May 9

6:00 am - 9:46 am

SUX

SEA

5h 46m

1 stop

3:48 pm - 11:44 pm

SEA

SUX

5h 56m

1 stop

$404United Airlines

Thu, Apr 23 - Mon, Apr 27

6:00 am - 3:51 pm

SUX

SEA

11h 51m

2 stops

3:48 pm - 11:44 pm

SEA

SUX

5h 56m

1 stop

$409United Airlines

Thu, Apr 23 - Sun, Apr 26

6:00 am - 3:51 pm

SUX

SEA

11h 51m

2 stops

12:22 pm - 11:44 pm

SEA

SUX

9h 22m

2 stops

$419United Airlines

Thu, Apr 23 - Mon, Apr 27

6:00 am - 4:04 pm

SUX

SEA

12h 04m

2 stops

5:00 am - 5:56 pm

SEA

SUX

10h 56m

2 stops

$426United Airlines

Tue, Apr 21 - Sat, Apr 25

6:00 am - 9:46 am

SUX

SEA

5h 46m

1 stop

7:00 am - 5:56 pm

SEA

SUX

8h 56m

1 stop

$539United Airlines

Tue, Apr 21 - Sat, Apr 25

6:00 am - 4:04 pm

SUX

SEA

12h 04m

2 stops

7:00 am - 5:56 pm

SEA

SUX

8h 56m

1 stop

$549United Airlines

Tue, Apr 21 - Sat, Apr 25

United Airlines flights from Sioux City to Seattle

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

United Airlines

Apr 21

SUX6:00 amSioux City Sioux Gateway

5h 46m

1 stop

SEA9:46 amSeattle/Tacoma Intl

Apr 25

SEA7:00 amSeattle/Tacoma Intl

8h 56m

1 stop

SUX5:56 pmSioux City Sioux Gateway

$384

United Airlines

Apr 21

SUX6:00 amSioux City Sioux Gateway

12h 04m

2 stops

SEA4:04 pmSeattle/Tacoma Intl

Apr 25

SEA7:00 amSeattle/Tacoma Intl

8h 56m

1 stop

SUX5:56 pmSioux City Sioux Gateway

$389

United Airlines

May 2

SUX12:55 pmSioux City Sioux Gateway

8h 05m

1 stop

SEA7:00 pmSeattle/Tacoma Intl

May 9

SEA7:00 amSeattle/Tacoma Intl

9h 06m

1 stop

SUX6:06 pmSioux City Sioux Gateway

$393

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Tue 4/21

6:00 am-9:46 am

1 stop5h 46m

Seattle/Tacoma Intl

Sat 4/25

7:00 am-5:56 pm

1 stop8h 56m

$384

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Tue 4/21

6:00 am-4:04 pm

2 stops12h 04m

Seattle/Tacoma Intl

Sat 4/25

7:00 am-5:56 pm

1 stop8h 56m

$389

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sat 5/2

12:55 pm-7:00 pm

1 stop8h 05m

Seattle/Tacoma Intl

Sat 5/9

7:00 am-6:06 pm

1 stop9h 06m

$393

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sat 5/2

6:00 am-2:36 pm

2 stops10h 36m

Seattle/Tacoma Intl

Sat 5/9

7:00 am-6:06 pm

1 stop9h 06m

$403

Quickest round-trip

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Thu 4/23

6:00 am-9:46 am

1 stop5h 46m

Seattle/Tacoma Intl

Mon 4/27

3:48 pm-11:44 pm

1 stop5h 56m

$404

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Thu 4/23

6:00 am-3:51 pm

2 stops11h 51m

Seattle/Tacoma Intl

Sun 4/26

3:48 pm-11:44 pm

1 stop5h 56m

$409

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Thu 4/23

6:00 am-3:51 pm

2 stops11h 51m

Seattle/Tacoma Intl

Mon 4/27

12:22 pm-11:44 pm

2 stops9h 22m

$419

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Tue 4/21

6:00 am-4:04 pm

2 stops12h 04m

Seattle/Tacoma Intl

Sat 4/25

5:00 am-5:56 pm

2 stops10h 56m

$426

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Tue 4/21

6:00 am-9:46 am

1 stop5h 46m

Seattle/Tacoma Intl

Sat 4/25

7:00 am-5:56 pm

1 stop8h 56m

$539

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Tue 4/21

6:00 am-4:04 pm

2 stops12h 04m

Seattle/Tacoma Intl

Sat 4/25

7:00 am-5:56 pm

1 stop8h 56m

$549

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 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 56% 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.

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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.

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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.