Cheap flights from Sioux City to Seattle from $546
This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Sioux City to Seattle departing on 7/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights
United Airlines flights from Sioux City to Seattle
Our best United Airlines deals on Sioux City to Seattle flight tickets
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How to get the cheapest flight ticket from Sioux City to Seattle
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest day to depart on your flight to Seattle?
On average, the least expensive day to fly to Seattle from Sioux City is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $522. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Thursday is the most expensive day to depart from Sioux City because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $693.
What is the cheapest time of day to depart on your flight to Seattle?
Flying to Seattle from Sioux City in the evening is the least expensive time of day to depart. momondo users have found prices as low as $516 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $564. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.
When to book flights from Sioux City to Seattle
Cheap Sioux City to Seattle (SUX to SEA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Sioux City to Seattle
How far is Sioux City Sioux Gateway to Seattle/Tacoma Intl by plane?
There are 1306.6 mi between Sioux City Sioux Gateway and Seattle/Tacoma Intl. 9h 41m is a normal flight duration for this route.
When did momondo last update prices for flights from Sioux City Sioux Gateway Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Sioux City Sioux Gateway Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Sioux City Sioux Gateway Airport to Seattle/Tacoma Intl Airport?
The number of operators available for flights from Sioux City Sioux Gateway Airport to Seattle/Tacoma Intl Airport is 1 as of March 2025.
How old do you have to be to fly from Sioux City Sioux Gateway Airport to Seattle/Tacoma Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Sioux City Sioux Gateway Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Sioux City to Seattle?
momondo data reveals that the most frequently booked airline on the route from Sioux City to Seattle is United Airlines, representing 100% of all bookings.
Best airlines flying from Sioux City to Seattle
Compare and see reviews for airlines that fly from Sioux City to Seattle with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $333 | Free Cancellation | Rating 7.4 8,623 reviews |
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Why should I use momondo to find a flight deal from Sioux City to Seattle?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seattle from Sioux City.
Can I find flights from Sioux City to Seattle with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Sioux City to Seattle flights to just show those with flexible booking policies.
How can momondo help me find flights from Sioux City to Seattle?
Once all potential Sioux City to Seattle flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Sioux City to Seattle right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Sioux City and alert you when they change.