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CA $690 Cheap Flights from Seattle (SEA) to Sioux City (SUX)

View CA $690 flight on Fri, Oct 9, 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Sioux City, IA (SUX-Sioux Gateway)

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Cheap flights from Seattle (SEA) to Sioux City (SUX)

Prices were available within the past 7 days and start at CA $690 for one-way flights and CA $789 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Oct 6 - Mon, Oct 12
SEA
Seattle
SUX
Sioux City
CA $789 Roundtrip, found 19 hours ago
CA $789
Roundtrip
found 19 hours ago
Select United flight, departing Tue, Oct 6 from Seattle to Sioux City, returning Mon, Oct 12, priced at CA $789 found 19 hours ago
United
Sat, Oct 10 - Mon, Oct 12
SEA
Seattle
SUX
Sioux City
CA $803 Roundtrip, found 19 hours ago
CA $803
Roundtrip
found 19 hours ago
Select United flight, departing Sat, Oct 10 from Seattle to Sioux City, returning Mon, Oct 12, priced at CA $803 found 19 hours ago
United
Fri, Oct 9 - Mon, Oct 12
SEA
Seattle
SUX
Sioux City
CA $931 Roundtrip, found 19 hours ago
CA $931
Roundtrip
found 19 hours ago
Select United flight, departing Fri, Oct 9 from Seattle to Sioux City, returning Mon, Oct 12, priced at CA $931 found 19 hours ago
United
Tue, Oct 6 - Sun, Oct 11
SEA
Seattle
SUX
Sioux City
CA $938 Roundtrip, found 19 hours ago
CA $938
Roundtrip
found 19 hours ago
Select United flight, departing Tue, Oct 6 from Seattle to Sioux City, returning Sun, Oct 11, priced at CA $938 found 19 hours ago
United
Tue, Oct 6 - Sat, Oct 10
SEA
Seattle
SUX
Sioux City
CA $946 Roundtrip, found 19 hours ago
CA $946
Roundtrip
found 19 hours ago
Select United flight, departing Tue, Oct 6 from Seattle to Sioux City, returning Sat, Oct 10, priced at CA $946 found 19 hours ago
United
Sat, Oct 10 - Sun, Oct 11
SEA
Seattle
SUX
Sioux City
CA $952 Roundtrip, found 19 hours ago
CA $952
Roundtrip
found 19 hours ago
Select United flight, departing Sat, Oct 10 from Seattle to Sioux City, returning Sun, Oct 11, priced at CA $952 found 19 hours ago
United
Fri, Oct 9 - Mon, Oct 12
SEA
Seattle
SUX
Sioux City
CA $974 Roundtrip, found 19 hours ago
CA $974
Roundtrip
found 19 hours ago
Select United flight, departing Fri, Oct 9 from Seattle to Sioux City, returning Mon, Oct 12, priced at CA $974 found 19 hours ago
United
Fri, Oct 9 - Mon, Oct 12
SEA
Seattle
SUX
Sioux City
CA $1,016 Roundtrip, found 19 hours ago
CA $1,016
Roundtrip
found 19 hours ago
Select United flight, departing Fri, Oct 9 from Seattle to Sioux City, returning Mon, Oct 12, priced at CA $1,016 found 19 hours ago
United
Tue, Oct 6 - Tue, Oct 13
SEA
Seattle
SUX
Sioux City
CA $1,017 Roundtrip, found 19 hours ago
CA $1,017
Roundtrip
found 19 hours ago
Select United flight, departing Tue, Oct 6 from Seattle to Sioux City, returning Tue, Oct 13, priced at CA $1,017 found 19 hours ago
United
Sat, Oct 10 - Tue, Oct 13
SEA
Seattle
SUX
Sioux City
CA $1,031 Roundtrip, found 19 hours ago
CA $1,031
Roundtrip
found 19 hours ago
Select United flight, departing Sat, Oct 10 from Seattle to Sioux City, returning Tue, Oct 13, priced at CA $1,031 found 19 hours ago

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sioux City, IA (SUX-Sioux Gateway) cost?
You can find one-way and return flights from SEA to SUX with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when SEA to SUX ticket fares go up or down.
What is the cheapest month to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sioux City, IA (SUX-Sioux Gateway)?
The cheapest months to fly from SEA to SUX are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sioux City, IA (SUX-Sioux Gateway)?
Enter SEA to SUX and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sioux City, IA (SUX-Sioux Gateway)?
United is one of the cheapest airlines offering connecting return flights from Seattle - Tacoma Intl. (SEA) to Sioux Gateway (SUX), with prices starting from around CA$333 for flights that can be booked for departure within the next year. These flights typically include a layover in San Francisco Intl. (SFO). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sioux City, IA (SUX-Sioux Gateway)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sioux City, IA (SUX-Sioux Gateway), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sioux City, IA (SUX-Sioux Gateway)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sioux City, IA (SUX-Sioux Gateway)?
While there are no direct flights, you'll find approximately 20 connecting flights per day from Seattle - Tacoma Intl. (SEA) to Sioux Gateway (SUX). Some common connection points include Denver Intl. (DEN), San Francisco Intl. (SFO), and Salt Lake City Intl. (SLC).
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sioux City, IA (SUX-Sioux Gateway)?
The earliest flight from Seattle - Tacoma Intl. (SEA) to Sioux Gateway (SUX) typically departs around 12:55 AM local time. This flight is operated by Delta and United. This is a seasonal service, active only in May. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sioux City, IA (SUX-Sioux Gateway)?
You'll find the most flights from Seattle - Tacoma Intl. (SEA) to Sioux Gateway (SUX) on a Friday, with around 23 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include Delta, United, and Alaska Airlines. Friday offers notably more flight options compared to other days of the week.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sioux City, IA (SUX-Sioux Gateway)?
The most popular departure times for flights from Seattle - Tacoma Intl. (SEA) to Sioux Gateway (SUX) are in the early morning, from 6am to 9am. Many major carriers, including United and Delta, offer flights during this window. Many travellers prefer these times because it allows for an early start to their journey, often leading to an earlier arrival at their destination.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sioux City, IA (SUX-Sioux Gateway)?
There are no nonstop flights from Seattle - Tacoma Intl. (SEA) to Sioux City, IA (SUX-Sioux Gateway). For flights with one stop, you can expect the journey to take around 8 hours 30 minutes. If you opt for flights with two or more stops, the travel time typically increases to about 11 hours. The distance covered on this route is approximately 2105 kilometres. Keep in mind that actual flight times can vary based on factors like layover duration, routing, and wind patterns.
Can you fly business or first class from Seattle, WA (SEA) to Sioux City, IA (SUX)?
Select the "Business class" and "First class" filters when looking for Seattle, WA (SEA) to Sioux City, IA (SUX) flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sioux City, IA (SUX-Sioux Gateway) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sioux City, IA (SUX-Sioux Gateway) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Sioux City, IA (SUX) from Seattle, WA (SEA)?
If you're planning to travel to Sioux City from Seattle - Tacoma Intl. (SEA), you can fly directly into Sioux Gateway (SUX). Some flights may connect through major hubs like San Francisco Intl. (SFO), Denver Intl. (DEN), or Los Angeles Intl. (LAX) before reaching Sioux City. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sioux City, IA (SUX-Sioux Gateway) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sioux City, IA (SUX-Sioux Gateway) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sioux City, IA (SUX-Sioux Gateway) flight and hotel package?
Securing a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sioux City, IA (SUX-Sioux Gateway) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sioux City, IA (SUX-Sioux Gateway)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma Intl.) to Sioux City, IA (SUX-Sioux Gateway) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Sioux Gateway
Airlines serving
United
Roundtrip price
CA $788
Distance
2093 km

Book with confidence

Seattle to Sioux City Flights

The easy way to book your flights from Seattle to Sioux City 

With Expedia, it’s simple to find and book flights to Sioux City from Seattle whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Sioux Gateway, too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Seattle to Sioux City today, tomorrow, or this week.  

 

Save dollars with cheap flights from Seattle - Tacoma Intl., SEA to Sioux Gateway, SUX 

Sort your search results by price to find great deals on your flight from Seattle to Sioux City—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Sioux City from Seattle currently is just CA $789 rising to CA $1,176.  

Here are more money-saving tips: 

  • Fly in October when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Sioux City  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Sioux City from Seattle 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Sioux City with Expedia today.

Seattle to Sioux City Flights

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