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SUX - SEA

$440 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 7/3. 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
Tue 7/9
Tue 7/16

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 42,898,604 times on KAYAK, and here is why:

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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 - 8:02 amSUX-SEA
15h 01m1 stop
6:45 am - 6:26 pmSEA-SUX
9h 41m2 stops
$440United Airlines
Find Deal
Wed, Jul 3 - Fri, Jul 5
7:01 pm - 8:02 amSUX-SEA
15h 01m1 stop
8:58 am - 6:26 pmSEA-SUX
7h 28m1 stop
$512United Airlines
Find Deal
Wed, Jul 3 - Fri, Jul 5
7:01 pm - 10:45 pmSUX-SEA
29h 44m2 stops
6:45 am - 6:26 pmSEA-SUX
9h 41m2 stops
$520United Airlines
Find Deal
Wed, Jul 3 - Fri, Jul 5
7:01 pm - 8:02 amSUX-SEA
15h 01m1 stop
5:10 am - 6:26 pmSEA-SUX
11h 16m1 stop
$539United Airlines
Find Deal
Sun, Jul 28 - Thu, Aug 1
7:01 pm - 8:02 amSUX-SEA
15h 01m1 stop
12:30 am - 10:53 pmSEA-SUX
20h 23m1 stop
$584United Airlines
Find Deal
Wed, Jul 3 - Thu, Jul 4
7:01 pm - 8:02 amSUX-SEA
15h 01m1 stop
6:45 am - 6:26 pmSEA-SUX
9h 41m2 stops
$626United Airlines
Find Deal
Sun, Jul 28 - Thu, Aug 1

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

$440
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 $440 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 10661 reviews
6.7Food
7.7Boarding
7.2Comfort
8.1Crew
7.1Entertainment
Airline reviews

It is a modern tragedy that any airline expects you to travel for 14 hours in such discomfort and that the only way to add comfort is exorbitant prices. I was in pain by the time we landed. Shameful.

4.0 OkayJames, Jun 2024RIC - ORD
Read more about United Airlines reviews

It is a modern tragedy that any airline expects you to travel for 14 hours in such discomfort and that the only way to add comfort is exorbitant prices. I was in pain by the time we landed. Shameful.

Original plane sidelined. Had to wait an hour for replacement.

Crew was very cooperative and professional. Passenger's first checked in bag should be free.

No real agent onsite helping you for missing luggage there. Not like the other airline next to UA desk, they have staff attending in their desk assisting answer/helping luggage issue, even after midnight.

Horrible, the flights kept delaying, so it is obvious that we won't be able to make it to the next connection. No easier/real agent on site to help you figure this out. UA agent on other counters refuse to assist you and direct us to use the QR code/call customer service. So inefficient and poor. While technology seems convenient, but it's not the best interest/experience for customers need help while there is active issue need assistance.

After the morning frenzy of 35 min wait through CLT security at 4;30 AM, it was nice to have a smooth pleasant boarding experience. This 6:30 AM flight was not full. We were able to get seated swiftly and took off promptly. Nice touch they distributed the old fashioned headsets with 8 mm jacks. Snacks were decent and arrival was uneventful.

My window shade didn’t work. So I missed coming into my city. ☹️

Flight was delayed in the gate by 5 hours and ultimately cancelled- rebooking service by United agents was terrible

Flight was delayed due to the late arrival of the catering truck, which is quite unacceptable. There was a beverage service, but no pretzel, or cookie, or nuts were served in coach.

Not worth the price of premium class ticket paid, felt more like steerage.

Sioux City - Seattle Flights

Departure:

Sioux City (SUX)United States

Destination:

Seattle (SEA)United States

Return flight deals:

Seattle - Sioux City

Cabin classes:

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