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$334+ Cheap flights from Sioux City (SUX) to Washington

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/31. Fares are subject to change and may not be available on all flights or dates of travel.
SUX — SEA
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from Sioux City to Washington

Cheapest flights from Sioux City to Washington
Explore the most affordable flight options available from Sioux City to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This United Airlines deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:54 pmSUX - PDX
1 stop6h 05mUnited Airlines
Mon 12/299:00 amPDX - SUX
1 stop7h 13mUnited Airlines
Deal found 12/9$390
This United Airlines deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3111:48 amSUX - SEA
2 stops15h 11mUnited Airlines
Sat 1/38:57 amSEA - SUX
1 stop7h 16mUnited Airlines
Deal found 12/11$595
This United Airlines deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:54 pmSUX - GEG
1 stop19h 51mUnited Airlines
Tue 12/304:00 pmGEG - SUX
1 stop17h 05mUnited Airlines
Deal found 12/11$848

Find flight deals from Sioux City to Washington

Keep the following information in mind while searching for Sioux City to Washington flight deals. Data was last updated December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$334
(United Airlines)
Provider with most accurate pricing for Sioux City Sioux Gateway-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sioux City Sioux Gateway-Seattle/Tacoma Intl flights.
Search Deals
From Sioux City Sioux Gateway to Washington
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sioux City to Washington that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 12, 2025.
Use the filters below to find and compare flights from Sioux City to Washington that are best for you.

Fly from

Sioux City

Fly to

Washington

Route

Depart

Return

Price

Sioux CitySpokane

SUX - GEG

SUXGEG

Sioux City Sioux Gateway

Sat 1/31

12:45 pm-9:22 pm

2 stops10h 37m

Spokane

Wed 2/4

4:10 pm-11:47 pm

1 stop5h 37m

$334

Sioux CityPortland

SUX - PDX

SUXPDX

Sioux City Sioux Gateway

Tue 1/13

6:00 am-9:45 am

1 stop5h 45m

Portland

Sat 1/17

1:35 pm-11:47 pm

2 stops8h 12m

$344

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Wed 1/21

12:45 pm-6:14 pm

1 stop7h 29m

Seattle/Tacoma Intl

Sat 1/24

3:30 pm-11:47 pm

1 stop6h 17m

$363

Sioux CityPortland

SUX - PDX

SUXPDX

Sioux City Sioux Gateway

Thu 12/25

6:54 pm-10:59 pm

1 stop6h 05m

Portland

Mon 12/29

9:00 am-6:13 pm

1 stop7h 13m

$390

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Wed 12/31

11:48 am-12:59 am

2 stops15h 11m

Seattle/Tacoma Intl

Sat 1/3

8:57 am-6:13 pm

1 stop7h 16m

$595

Sioux CitySpokane

SUX - GEG

SUXGEG

Sioux City Sioux Gateway

Fri 12/26

6:54 pm-12:45 pm

1 stop19h 51m

Spokane

Tue 12/30

4:00 pm-11:05 am

1 stop17h 05m

$848

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

Best time to book a flight from Sioux City to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Sioux City with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Sioux City to Washington

What is the cheapest month to book a flight from Sioux City to State of Washington?

Currently, May is the cheapest month in which you can book a flight from Sioux City to State of Washington (average of $121). Flying from Sioux City to State of Washington in June is currently the most expensive (average of $283). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SUX to WA?

Find hourly flight availability from Sioux City to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

It’s typically best to fly out from Sioux City to State of Washington at noon. Doing so could potentially save you 50% on the flight price compared to flying in the afternoon, which is usually more expensive.

Related info for your journey

Find useful and relevant information for your journey from Sioux City to Washington. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Sioux City to Washington?

    Sioux City Sioux Gateway (SUX), located 7.0 mi from the city center, is the airport you fly out of when you book flights from Sioux City to Washington.

  • How long is the flight from Sioux City to State of Washington?

    United Airlines can get you from Sioux City to State of Washington in just under 10h 37m. Your travel time can differ by up to . The distance between Sioux City and State of Washington is about 1089 mi.

  • What are the most popular routes from Sioux City to State of Washington?

    Most travelers choose Sioux City Sioux Gateway - Seattle/Tacoma Intl, Sioux City Sioux Gateway - Portland or Sioux City Sioux Gateway - Spokane when deciding on the best route from Sioux City to State of Washington.

  • Can I find deals for flights from Sioux City to Washington that include hotel bookings?

    Yes. In addition to deals on Sioux City to Washington flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Sioux City to Washington?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sioux City to Washington.

  • Can I find deals for business class flights from Sioux City to Washington?

    Yes. Cheapflights offers flight deals from Sioux City to Washington by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Sioux City to State of Washington?

    Currently, May is the cheapest month in which you can book a flight from Sioux City to State of Washington (average of $121). Flying from Sioux City to State of Washington in June is currently the most expensive (average of $283). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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