What airlines fly to Seattle?

Alaska Airlines, United Airlines and American Airlines are the top three most popular airlines that fly to Seattle from Sioux City according to our data. Alaska Airlines is the first choice among our users, with 59% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 7 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Sioux City Sioux Gateway to Seattle/Tacoma Intl?

United Airlines is the most popular carrier operating from Sioux City Sioux Gateway to Seattle/Tacoma Intl

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 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.

$328 Cheap Flights from Sioux City to Seattle in 2025

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Find the cheapest flights from Sioux City to Seattle

Round-trip

One-way

Cheap round-trip flights

6:53 pm - 10:59 pmSUX-SEA

6h 06m1 stop

6:45 am - 6:18 pmSEA-SUX

9h 33m2 stops

$381United Airlines

Find Deal

Wed, Aug 13 - Sun, Aug 17

6:53 pm - 10:59 pmSUX-SEA

6h 06m1 stop

8:57 am - 6:18 pmSEA-SUX

7h 21m1 stop

$403United Airlines

Find Deal

Wed, Aug 13 - Sun, Aug 17

10:10 am - 4:20 pmSUX-SEA

8h 10m1 stop

11:10 am - 6:13 pmSEA-SUX

5h 03m1 stop

$484United Airlines

Find Deal

Thu, Aug 14 - Tue, Aug 19

10:10 am - 4:20 pmSUX-SEA

8h 10m1 stop

7:10 am - 10:57 pmSEA-SUX

13h 47m2 stops

$490United Airlines

Find Deal

Thu, Aug 14 - Tue, Aug 19

6:53 pm - 9:23 pmSUX-SEA

28h 30m1 stop

12:20 am - 10:40 pmSEA-SUX

20h 20m1 stop

$494United Airlines

Find Deal

Thu, Jul 31 - Wed, Aug 6

6:53 pm - 10:59 pmSUX-SEA

6h 06m1 stop

11:11 am - 6:18 pmSEA-SUX

5h 07m1 stop

$505United Airlines

Find Deal

Thu, Jul 24 - Mon, Jul 28

6:53 pm - 10:59 pmSUX-SEA

6h 06m1 stop

11:45 pm - 10:40 pmSEA-SUX

20h 55m1 stop

$506United Airlines

Find Deal

Thu, Jul 31 - Thu, Aug 7

6:53 pm - 10:59 pmSUX-SEA

6h 06m1 stop

5:10 am - 6:18 pmSEA-SUX

11h 08m2 stops

$507United Airlines

Find Deal

Thu, Jul 24 - Mon, Jul 28

10:10 am - 5:49 pmSUX-SEA

9h 39m2 stops

6:45 am - 6:18 pmSEA-SUX

9h 33m2 stops

$535United Airlines

Find Deal

Wed, Aug 13 - Sun, Aug 17

6:53 pm - 10:59 pmSUX-SEA

6h 06m1 stop

6:45 am - 10:40 pmSEA-SUX

13h 55m2 stops

$550United Airlines

Find Deal

Thu, Jul 31 - Thu, Aug 7

United Airlines flights from Sioux City to Seattle

Our best United Airlines deals on Sioux City to Seattle flight tickets

United Airlines

Aug 13

SUX6:53 pmSioux City Sioux Gateway

6h 06m

1 stop

SEA10:59 pmSeattle/Tacoma Intl

Aug 17

SEA6:45 amSeattle/Tacoma Intl

9h 33m

2 stops

SUX6:18 pmSioux City Sioux Gateway

$381

Find similar

United Airlines

Aug 13

SUX6:53 pmSioux City Sioux Gateway

6h 06m

1 stop

SEA10:59 pmSeattle/Tacoma Intl

Aug 17

SEA8:57 amSeattle/Tacoma Intl

7h 21m

1 stop

SUX6:18 pmSioux City Sioux Gateway

$403

Find similar

United Airlines

Aug 14

SUX10:10 amSioux City Sioux Gateway

8h 10m

1 stop

SEA4:20 pmSeattle/Tacoma Intl

Aug 19

SEA11:10 amSeattle/Tacoma Intl

5h 03m

1 stop

SUX6:13 pmSioux City Sioux Gateway

$484

Find similar

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

Prices

Airlines

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

Are you open to changing your travel dates? Check out the ideal times to fly from Sioux City to Seattle according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

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

Best Price Found	$386
Fastest flight time	6h 06m
Direct flights	None
Airports in Seattle	1 airport

The best one-way flight to Seattle from Sioux City in the past 72 hours is $386. The best round-trip flight deal from Sioux City to Seattle found on momondo in the last 72 hours is $381.

The fastest flight from Sioux City to Seattle takes 6h 06m

There are no direct flights from Sioux City to Seattle. Popular non-direct route for this connection is Sioux City Sioux Gateway Airport - Seattle/Tacoma Intl Airport.

There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

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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. 6h 06m 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 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.

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Why use momondo?

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.