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SUX - SEA

$426 Find cheap flights from Sioux City to Seattle

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Sioux City to Seattle departing on 8/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Mon 7/1
Mon 7/8

Search hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sioux City to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sioux City to Seattle, as well as popular online travel agencies
In the last 7 days travelers have searched 42,335,261 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals from Sioux City to Seattle (SUX-SEA)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Sioux City to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
7:01 pm - 10:45 pmSUX-SEA
5h 44m1 stop
6:35 pm - 6:26 pmSEA-SUX
21h 51m1 stop
$426United Airlines
Find Deal
Thu, Aug 8 - Mon, Aug 12
7:01 pm - 10:50 pmSUX-SEA
5h 49m1 stop
6:35 pm - 6:26 pmSEA-SUX
21h 51m1 stop
$437United Airlines
Find Deal
Sat, Jun 22 - Tue, Jun 25
7:01 pm - 10:45 pmSUX-SEA
5h 44m1 stop
12:30 am - 10:53 pmSEA-SUX
20h 23m1 stop
$463United Airlines
Find Deal
Thu, Aug 8 - Sun, Aug 11
7:01 pm - 10:45 pmSUX-SEA
5h 44m1 stop
6:45 am - 6:26 pmSEA-SUX
9h 41m2 stops
$503United Airlines
Find Deal
Thu, Aug 8 - Mon, Aug 12
7:01 pm - 10:50 pmSUX-SEA
5h 49m1 stop
4:25 pm - 6:26 pmSEA-SUX
24h 01m2 stops
$526United Airlines
Find Deal
Sat, Jun 22 - Tue, Jun 25
7:01 pm - 10:50 pmSUX-SEA
5h 49m1 stop
4:25 pm - 6:59 pmSEA-SUX
48h 34m3 stops
$552United Airlines
Find Deal
Sat, Jun 22 - Tue, Jun 25
6:15 am - 10:45 pmSUX-SEA
18h 30m2 stops
12:30 am - 10:53 pmSEA-SUX
20h 23m1 stop
$592United Airlines
Find Deal
Thu, Aug 8 - Sun, Aug 11
7:01 pm - 10:35 pmSUX-SEA
53h 34m3 stops
6:35 pm - 6:26 pmSEA-SUX
21h 51m1 stop
$605United Airlines
Find Deal
Thu, Aug 8 - Mon, Aug 12

Flights from Sioux City to Seattle - Travel Insights & Trends

Get data-powered insights and trends into flights from Sioux City to Seattle to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Sioux City to Seattle?

The average price of all flights from Sioux City to Seattle clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from Sioux City to Seattle, look for departures on Mondays and avoid leaving on a Thursday, as it's usually the priciest day. When flying back from Seattle, Monday is the cheapest day to fly and Wednesday is the most expensive.

Good to know

Cheapest flight

$426
Flight from Sioux City to Seattle

When to book flights from Sioux City to Seattle

Are your dates flexible? Find out the best times to travel from Sioux City to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Sioux City to Seattle

  • What is the cheapest flight from Sioux City to Seattle?

    In the last 3 days, the lowest price for a flight from Sioux City to Seattle was $426 for a round-trip ticket.

  • Do I need a passport to fly between Sioux City and Seattle?

    No

  • Which airports will I be using when flying from Sioux City to Seattle?

    Sioux City and Seattle are both served by 1 main airport. You will leave Sioux City from Sioux City Sioux Gateway and will be arriving at Seattle/Tacoma Intl.

  • Which aircraft models fly most regularly from Sioux City to Seattle?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Sioux City to Seattle?

    Star Alliance is the only airline alliance operating flights between Sioux City and Seattle.

  • How does KAYAK find such low prices on flights from Sioux City to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Sioux City to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Sioux City to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Sioux City is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Sioux City to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Sioux City with another airline. Booking your flights between Sioux City and SEA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Sioux City to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Sioux City up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top airline flying from Sioux City to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Sioux City to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Sioux City to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 10754 reviews
7.7Boarding
8.1Crew
6.7Food
7.2Comfort
7.1Entertainment
Airline reviews

I had a great flight. Everything went smoothly and the flight arrived early.

10.0 ExcellentShirley, May 2024LAX - ORD
Read more about United Airlines reviews

I had a great flight. Everything went smoothly and the flight arrived early.

The flight and boarding were easy peasy. I was traveling with my 4-year-old, so a smooth boarding experience was especially appreciated. My only piece of feedback is really about where our gate was in O'Hare. They've shoved four gates into a tiny corner of the B terminal and there isn't early enough room or seating for everyone. Not United's problem, but did dent the overall experience.

Dinner was okay but the breakfast was not eatable on the flight San Francisco to Zurich.

There was no screens on board AND the WiFi didn’t work. My seat was broken and couldn’t recline so I couldn’t even sleep. The flight attendants didn’t offer anything to make it more comfortable. It was such an old cramped plane, when the person in front of me reclined I couldn’t even open my tray table. All the United ads talk about guaranteeing everyone gets a screen!

The Wi-Fi was unavailable on this flight for some reason.

On time take off…US cabins look tired and need of refresh!

Fantastic. Smooth boarding with an infant. Never experienced it with any other carriers.

This was a Lufthansa flight, not United. The CSA at the counter, Ashley, was not only incompetent, but quite rude. Me and two other PAX waited over 7 minutes standing in front of her and another CSA and they ignored us. We joked that we must have accidently taken invisibility pills. She could have at least said "I'll be with you in a moment, I'm currently....". I could go on about how rude she and the other CSAs were (whispering, not communicating with me, blaming the situation on others, etc.). She would not work for me. Then, she gave me literally the worst seat on the plane. the worst. My seat kept getting bumped (rammed twice by the crew with their carts and about every 5 minutes by someone using the bathroom), listening to the bathroom all night, crowded seat, etc.

My seat was broken. WiFi didn’t work. Gate crew at HOU were rude and condescending. Treated all the passengers badly. Bad experience, United.

First flight of the day… MINIMUM FUEL! 15 minute landing delay at HOU due to fog turned into a 2+ hour delay! Rather than circle, they had to divert to another city to refuel! Sat on tarmac at Austin to refuel. We ALL missed our connections! The crew, including pilots, were clueless. Crew was really a mess. At HOU, Untied employees were exceedingly rude to all. It was pitiful.

Sioux City - Seattle Flights

Departure:

Sioux City (SUX)United States

Destination:

Seattle (SEA)United States

Return flight deals:

Seattle - Sioux City

Cabin classes: