What is the cheapest airline that flies from Sioux City Sioux Gateway to Washington?

United Airlines is the most popular carrier operating from Sioux City Sioux Gateway to Washington

What airlines fly to State of Washington?

Alaska Airlines, United Airlines and American Airlines are the top three most popular airlines that fly to State of Washington from Sioux City according to our data. Alaska Airlines is the first choice among our users, with 46% of people opting to fly with this airline when traveling to State of Washington. Keep in mind that there are 7 different airlines that fly to State of Washington on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Sioux City Sioux Gateway Airport to Washington?

Prices for flights from Sioux City Sioux Gateway Airport to Washington are updated daily.

How many operators does momondo search for flights from Sioux City Sioux Gateway Airport to Washington?

The number of operators available for flights from Sioux City Sioux Gateway Airport to Washington is 1 as of April 2026.

How old do you have to be to fly from Sioux City Sioux Gateway Airport to Washington?

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 Washington.

What documentation or ID do you need to fly to Washington?

The required travel and health documents for your Washington trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$262 Cheap Flights from Sioux City to Washington in 2026

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Find the cheapest flights from Sioux City to Washington

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 9:40 am

SUX

SEA

5h 40m

1 stop

7:00 am - 6:06 pm

SEA

SUX

9h 06m

1 stop

$262United Airlines

Sat, May 2 - Tue, May 5

6:00 am - 2:36 pm

SUX

SEA

10h 36m

2 stops

7:00 am - 6:06 pm

SEA

SUX

9h 06m

1 stop

$267United Airlines

Sat, May 2 - Tue, May 5

12:55 pm - 1:12 am

SUX

SEA

14h 17m

2 stops

5:02 am - 6:06 pm

SEA

SUX

11h 04m

2 stops

$418United Airlines

Sat, May 2 - Tue, May 5

6:00 am - 9:59 am

SUX

SEA

5h 59m

1 stop

3:51 pm - 11:42 pm

SEA

SUX

5h 51m

1 stop

$424United Airlines

Sat, Sep 26 - Wed, Sep 30

6:00 am - 4:27 pm

SUX

SEA

12h 27m

2 stops

3:51 pm - 11:42 pm

SEA

SUX

5h 51m

1 stop

$434United Airlines

Sat, Sep 26 - Wed, Sep 30

6:48 pm - 10:59 pm

SUX

SEA

6h 11m

1 stop

3:51 pm - 11:42 pm

SEA

SUX

5h 51m

1 stop

$449United Airlines

Sat, Sep 26 - Wed, Sep 30

6:30 pm - 10:52 pm

SUX

PDX

6h 22m

1 stop

4:07 pm - 11:46 pm

PDX

SUX

5h 39m

1 stop

$449United Airlines

Sat, Aug 22 - Wed, Aug 26

6:00 am - 12:24 pm

SUX

SEA

8h 24m

2 stops

12:15 pm - 11:42 pm

SEA

SUX

9h 27m

2 stops

$464United Airlines

Sat, Sep 26 - Wed, Sep 30

6:48 pm - 10:59 pm

SUX

SEA

6h 11m

1 stop

8:35 am - 11:42 pm

SEA

SUX

13h 07m

2 stops

$484United Airlines

Sat, Sep 26 - Wed, Sep 30

11:32 am - 5:44 pm

SUX

PDX

8h 12m

1 stop

4:15 pm - 10:57 am

PDX

SUX

16h 42m

1 stop

$497United Airlines

Wed, Jun 24 - Tue, Jun 30

United Airlines flights from Sioux City to State of Washington

Our best United Airlines deals on Sioux City to State of Washington flight tickets

United Airlines

May 2

SUX6:00 amSioux City Sioux Gateway

5h 40m

1 stop

SEA9:40 amSeattle/Tacoma Intl

May 5

SEA7:00 amSeattle/Tacoma Intl

9h 06m

1 stop

SUX6:06 pmSioux City Sioux Gateway

$262

United Airlines

May 2

SUX6:00 amSioux City Sioux Gateway

10h 36m

2 stops

SEA2:36 pmSeattle/Tacoma Intl

May 5

SEA7:00 amSeattle/Tacoma Intl

9h 06m

1 stop

SUX6:06 pmSioux City Sioux Gateway

$267

United Airlines

May 2

SUX12:55 pmSioux City Sioux Gateway

14h 17m

2 stops

SEA1:12 amSeattle/Tacoma Intl

May 5

SEA5:02 amSeattle/Tacoma Intl

11h 04m

2 stops

SUX6:06 pmSioux City Sioux Gateway

$418

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sat 5/2

6:00 am-9:40 am

1 stop5h 40m

Seattle/Tacoma Intl

Tue 5/5

7:00 am-6:06 pm

1 stop9h 06m

$262

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sat 5/2

6:00 am-2:36 pm

2 stops10h 36m

Seattle/Tacoma Intl

Tue 5/5

7:00 am-6:06 pm

1 stop9h 06m

$267

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sat 5/2

12:55 pm-1:12 am

2 stops14h 17m

Seattle/Tacoma Intl

Tue 5/5

5:02 am-6:06 pm

2 stops11h 04m

$418

Quickest round-trip

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sat 9/26

6:00 am-9:59 am

1 stop5h 59m

Seattle/Tacoma Intl

Wed 9/30

3:51 pm-11:42 pm

1 stop5h 51m

$424

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sat 9/26

6:00 am-4:27 pm

2 stops12h 27m

Seattle/Tacoma Intl

Wed 9/30

3:51 pm-11:42 pm

1 stop5h 51m

$434

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sat 9/26

6:48 pm-10:59 pm

1 stop6h 11m

Seattle/Tacoma Intl

Wed 9/30

3:51 pm-11:42 pm

1 stop5h 51m

$449

Sioux CityPortland

SUX - PDX

SUXPDX

Sioux City Sioux Gateway

Sat 8/22

6:30 pm-10:52 pm

1 stop6h 22m

Portland

Wed 8/26

4:07 pm-11:46 pm

1 stop5h 39m

$449

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sat 9/26

6:00 am-12:24 pm

2 stops8h 24m

Seattle/Tacoma Intl

Wed 9/30

12:15 pm-11:42 pm

2 stops9h 27m

$464

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sat 9/26

6:48 pm-10:59 pm

1 stop6h 11m

Seattle/Tacoma Intl

Wed 9/30

8:35 am-11:42 pm

2 stops13h 07m

$484

Sioux CityPortland

SUX - PDX

SUXPDX

Sioux City Sioux Gateway

Wed 6/24

11:32 am-5:44 pm

1 stop8h 12m

Portland

Tue 6/30

4:15 pm-10:57 am

1 stop16h 42m

$497

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Sioux City to State of Washington

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

Prices

Airlines

Can stopping save me money on Sioux City to State of Washington flights?

You could potentially save up to 63% on your flight if you consider stops on a Sioux City to State of Washington flight.

Cheap Sioux City to State of Washington flight deals and tips

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

Fastest flight time	5h 33m
Direct flights	None

The fastest flight from Sioux City to State of Washington takes 5h 33m

There are no direct flights from Sioux City to State of Washington. There are no popular flight routes from Sioux City to State of Washington.

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Frequently asked questions about flying from Sioux City to Washington

When did momondo last update prices for flights from Sioux City Sioux Gateway Airport to Washington?
Prices for flights from Sioux City Sioux Gateway Airport to Washington are updated daily.
How many operators does momondo search for flights from Sioux City Sioux Gateway Airport to Washington?
The number of operators available for flights from Sioux City Sioux Gateway Airport to Washington is 1 as of April 2026.
How old do you have to be to fly from Sioux City Sioux Gateway Airport to Washington?
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 Washington.
What documentation or ID do you need to fly to Washington?
The required travel and health documents for your Washington trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Why use momondo?

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

It is quick and easy to find Sioux City to Washington flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington that suits you.

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

Yes. All flights to Washington from Sioux City on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo provides multiple filters to help you find the best flight to Washington from Sioux City. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Sioux City to Washington right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Sioux City to Washington flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.