What airlines fly to State of Washington?

Alaska Airlines, United Airlines and Delta 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 41% of people opting to fly with this airline when traveling to State of Washington. Keep in mind that there are 5 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 September 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.

$344 Cheap Flights from Sioux City to Washington in 2026/27

Find the cheapest flights from Sioux City to Washington

Round-trip

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:58 pm - 10:59 pmSUX Sioux City Sioux Gateway-SEA Seattle/Tacoma Intl

6h 01m1 stop Denver Intl

3:49 pm - 11:43 pmSEA Seattle/Tacoma Intl-SUX Sioux City Sioux Gateway

5h 54m1 stop Denver Intl

$344United Airlines

Wed, Oct 21 - Fri, Nov 6

6:58 pm - 10:59 pmSUX Sioux City Sioux Gateway-SEA Seattle/Tacoma Intl

6h 01m1 stop Denver Intl

10:40 am - 11:43 pmSEA Seattle/Tacoma Intl-SUX Sioux City Sioux Gateway

11h 03m2 stops San Francisco Denver Intl

$385United Airlines

Wed, Oct 21 - Fri, Nov 6

6:58 pm - 10:59 pmSUX Sioux City Sioux Gateway-SEA Seattle/Tacoma Intl

6h 01m1 stop Denver Intl

7:00 am - 5:53 pmSEA Seattle/Tacoma Intl-SUX Sioux City Sioux Gateway

8h 53m1 stop Chicago O'Hare Intl

$388United Airlines

Fri, Oct 2 - Tue, Oct 6

9:03 am - 5:53 pmSUX Sioux City Sioux Gateway-GEG Spokane

10h 50m2 stops Chicago O'Hare Intl Denver Intl

7:00 am - 5:54 pmGEG Spokane-SUX Sioux City Sioux Gateway

8h 54m1 stop Chicago O'Hare Intl

$406United Airlines

Sat, Jan 30 - Wed, Feb 3

9:03 am - 5:53 pmSUX Sioux City Sioux Gateway-GEG Spokane

10h 50m2 stops Chicago O'Hare Intl Denver Intl

5:00 am - 5:54 pmGEG Spokane-SUX Sioux City Sioux Gateway

10h 54m2 stops Denver Intl Chicago O'Hare Intl

$411United Airlines

Sat, Jan 30 - Wed, Feb 3

6:00 am - 11:52 amSUX Sioux City Sioux Gateway-PDX Portland

7h 52m1 stop Chicago O'Hare Intl

4:25 pm - 11:43 pmPDX Portland-SUX Sioux City Sioux Gateway

5h 18m1 stop Denver Intl

$434United Airlines

Sat, Oct 31 - Tue, Nov 3

8:35 am - 8:37 pmSUX Sioux City Sioux Gateway-SEA Seattle/Tacoma Intl

14h 02m2 stops Chicago O'Hare Intl Washington, D.C. Dulles Intl

7:00 am - 5:53 pmSEA Seattle/Tacoma Intl-SUX Sioux City Sioux Gateway

8h 53m1 stop Chicago O'Hare Intl

$439United Airlines

Tue, Oct 20 - Sat, Oct 24

6:00 am - 6:24 pmSUX Sioux City Sioux Gateway-PDX Portland

14h 24m2 stops Chicago O'Hare Intl San Francisco

4:25 pm - 11:43 pmPDX Portland-SUX Sioux City Sioux Gateway

5h 18m1 stop Denver Intl

$444United Airlines

Sat, Oct 31 - Tue, Nov 3

6:00 am - 1:25 pmSUX Sioux City Sioux Gateway-PDX Portland

9h 25m2 stops Chicago O'Hare Intl Denver Intl

10:59 am - 11:43 pmPDX Portland-SUX Sioux City Sioux Gateway

10h 44m2 stops San Francisco Denver Intl

$449United Airlines

Sat, Oct 31 - Tue, Nov 3

6:00 am - 6:24 pmSUX Sioux City Sioux Gateway-PDX Portland

14h 24m2 stops Chicago O'Hare Intl San Francisco

9:00 am - 11:43 pmPDX Portland-SUX Sioux City Sioux Gateway

12h 43m2 stops San Francisco Denver Intl

$449United Airlines

Sat, Oct 31 - Tue, Nov 3

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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

Oct 21

SUX6:58 pmSioux City Sioux Gateway

6h 01m

1 stop

SEA10:59 pmSeattle/Tacoma Intl

Nov 6

SEA3:49 pmSeattle/Tacoma Intl

5h 54m

1 stop

SUX11:43 pmSioux City Sioux Gateway

$344

United Airlines

Oct 21

SUX6:58 pmSioux City Sioux Gateway

6h 01m

1 stop

SEA10:59 pmSeattle/Tacoma Intl

Nov 6

SEA10:40 amSeattle/Tacoma Intl

11h 03m

2 stops

SUX11:43 pmSioux City Sioux Gateway

$385

United Airlines

Oct 2

SUX6:58 pmSioux City Sioux Gateway

6h 01m

1 stop

SEA10:59 pmSeattle/Tacoma Intl

Oct 6

SEA7:00 amSeattle/Tacoma Intl

8h 53m

1 stop

SUX5:53 pmSioux City Sioux Gateway

$388

momondo Fare Finder

Use the filters below to find and compare flights from Sioux City to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

Sioux CitySeattle

SUX Sioux City Sioux Gateway - SEA Seattle/Tacoma Intl

SUXSEA

Sioux City Sioux Gateway

Wed 10/21

6:58 pm-10:59 pm

1 stop6h 01m

Seattle/Tacoma Intl

Fri 11/6

3:49 pm-11:43 pm

1 stop5h 54m

$344

Sioux CitySeattle

SUX Sioux City Sioux Gateway - SEA Seattle/Tacoma Intl

SUXSEA

Sioux City Sioux Gateway

Wed 10/21

6:58 pm-10:59 pm

1 stop6h 01m

Seattle/Tacoma Intl

Fri 11/6

10:40 am-11:43 pm

2 stops11h 03m

$385

Sioux CitySeattle

SUX Sioux City Sioux Gateway - SEA Seattle/Tacoma Intl

SUXSEA

Sioux City Sioux Gateway

Fri 10/2

6:58 pm-10:59 pm

1 stop6h 01m

Seattle/Tacoma Intl

Tue 10/6

7:00 am-5:53 pm

1 stop8h 53m

$388

Sioux CitySpokane

SUX Sioux City Sioux Gateway - GEG Spokane

SUXGEG

Sioux City Sioux Gateway

Sat 1/30

9:03 am-5:53 pm

2 stops10h 50m

Spokane

Wed 2/3

7:00 am-5:54 pm

1 stop8h 54m

$406

Sioux CitySpokane

SUX Sioux City Sioux Gateway - GEG Spokane

SUXGEG

Sioux City Sioux Gateway

Sat 1/30

9:03 am-5:53 pm

2 stops10h 50m

Spokane

Wed 2/3

5:00 am-5:54 pm

2 stops10h 54m

$411

Sioux CityPortland

SUX Sioux City Sioux Gateway - PDX Portland

SUXPDX

Sioux City Sioux Gateway

Sat 10/31

6:00 am-11:52 am

1 stop7h 52m

Portland

Tue 11/3

4:25 pm-11:43 pm

1 stop5h 18m

$434

Sioux CitySeattle

SUX Sioux City Sioux Gateway - SEA Seattle/Tacoma Intl

SUXSEA

Sioux City Sioux Gateway

Tue 10/20

8:35 am-8:37 pm

2 stops14h 02m

Seattle/Tacoma Intl

Sat 10/24

7:00 am-5:53 pm

1 stop8h 53m

$439

Sioux CityPortland

SUX Sioux City Sioux Gateway - PDX Portland

SUXPDX

Sioux City Sioux Gateway

Sat 10/31

6:00 am-6:24 pm

2 stops14h 24m

Portland

Tue 11/3

4:25 pm-11:43 pm

1 stop5h 18m

$444

Sioux CityPortland

SUX Sioux City Sioux Gateway - PDX Portland

SUXPDX

Sioux City Sioux Gateway

Sat 10/31

6:00 am-1:25 pm

2 stops9h 25m

Portland

Tue 11/3

10:59 am-11:43 pm

2 stops10h 44m

$449

Sioux CityPortland

SUX Sioux City Sioux Gateway - PDX Portland

SUXPDX

Sioux City Sioux Gateway

Sat 10/31

6:00 am-6:24 pm

2 stops14h 24m

Portland

Tue 11/3

9:00 am-11:43 pm

2 stops12h 43m

$449

Flights are sorted by cheapest round-trip flights first.

Sorted 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 9% 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

Best Price Found	$344
Fastest flight time	5h 55m
Direct flights	None

The best flight deal from Sioux City to State of Washington found on momondo in the last 72 hours is $344

The fastest flight from Sioux City to State of Washington takes 5h 55m

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.

Search flight deals

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 September 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.