$334+ Cheap flights from Sioux City to Seattle (SUX - SEA)
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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
SUX — SEA
oct. 11 — oct. 181
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Sioux City to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Sioux City (SUX) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated septiembre 11, 2025.
Round-trip from | $334 (United Airlines) |
|---|
Find flight deals from Sioux City to Seattle
Cheapest flights from Sioux City to SeattleExplore the most affordable flight options available from Sioux City to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 11, 2025.
Explore the most affordable flight options available from Sioux City to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 11, 2025.
This United Airlines deal was found by Cheapflights users on 9/11. 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.
sáb. 10/186:51 pmSUX - SEA
1 stop17h 08mUnited Airlines
sáb. 10/251:57 pmSEA - SUX
1 stop7h 03mUnited Airlines
Deal found 9/11![United Airlines logo]()
$411
This United Airlines deal was found by Cheapflights users on 9/10. 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.
jue. 9/256:51 pmSUX - SEA
1 stop6h 38mUnited Airlines
lun. 9/2911:10 amSEA - SUX
1 stop5h 04mUnited Airlines
Deal found 9/10![United Airlines logo]()
$436
Cheapflights Fare Finder
Customize your flight search to find flights from Sioux City to Seattle 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 septiembre 11, 2025.
Use the filters below to find and compare flights from Sioux City to Seattle that are best for you.
Fly from
Sioux City
Fly to
Seattle
Route
Depart
Return
Price
Sioux CitySeattle
SUX - SEA
SUXSEA
Sioux City Sioux Gateway
mar. 3/3
6:54 pm-10:59 pm
1 stop6h 05m
Seattle/Tacoma Intl
sáb. 3/7
6:31 am-5:32 pm
1 stop9h 01m
$334
Sioux CitySeattle
SUX - SEA
SUXSEA
Sioux City Sioux Gateway
mié. 3/4
6:00 am-9:59 am
1 stop5h 59m
Seattle/Tacoma Intl
sáb. 3/7
6:31 am-5:32 pm
1 stop9h 01m
$334
Sioux CitySeattle
SUX - SEA
SUXSEA
Sioux City Sioux Gateway
sáb. 10/18
6:51 pm-9:59 am
1 stop17h 08m
Seattle/Tacoma Intl
sáb. 10/25
1:57 pm-11:00 pm
1 stop7h 03m
$411
Sioux CitySeattle
SUX - SEA
SUXSEA
Sioux City Sioux Gateway
jue. 9/25
6:51 pm-11:29 pm
1 stop6h 38m
Seattle/Tacoma Intl
lun. 9/29
11:10 am-6:14 pm
1 stop5h 04m
$436
Best time to book a flight from Sioux City to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle 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 Seattle
What is the cheapest month to book a flight from Sioux City to Seattle?
Currently, January is the cheapest month in which you can book a flight from Sioux City to Seattle (average of $238). Flying from Sioux City to Seattle in June is currently the most expensive (average of $388). 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 SEA?
Find hourly flight availability from Sioux City to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated septiembre 11, 2025.
One of the essential ways to save on airfare from Sioux City to Seattle is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 9% on airfare.
Related info for your journey
Find useful and relevant information for your journey from Sioux City to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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