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Cheap flights from Sioux City to Washington from $289

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Sioux City to Washington departing on 1/3. 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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0 bags

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Cheap one-way flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:54 pm - 11:12 pmSUX-SEA
6h 18m1 stop
$289United Airlines
Find Deal
Sat, Jan 3
United Airlines Logo
6:54 pm - 12:27 pmSUX-SEA
19h 33m2 stops
$511United Airlines
Find Deal
Sat, Jan 3
United Airlines Logo
6:54 pm - 12:27 pmSUX-SEA
19h 33m3 stops
$610United Airlines
Find Deal
Sat, Jan 3
United Airlines Logo
6:54 pm - 9:07 pmSUX-SEA
28h 13m3 stops
$1,467United Airlines
Find Deal
Sat, Jan 3

momondo Fare Finder

 
Customize your flight search to find flights from Sioux City to State of Washington 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, momondo users made 832,500 searches. Data last updated November 18, 2025.
Use the filters below to find and compare flights from Sioux City to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sat 1/3

6:54 pm-11:12 pm

1 stop6h 18m

$289

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sat 1/3

6:54 pm-12:27 pm

2 stops19h 33m

$511

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sat 1/3

6:54 pm-12:27 pm

3 stops19h 33m

$610

Sioux CitySeattle

SUX - SEA

SUXSEA

Sioux City Sioux Gateway

Sat 1/3

6:54 pm-9:07 pm

3 stops28h 13m

$1,467

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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How to get the cheapest flight ticket from Sioux City to State of Washington

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 State of Washington?

The cheapest day to depart from Sioux City to State of Washington is on a Tuesday. Travelers who choose to depart for State of Washington on a Tuesday will often find tickets for as low as $522. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Sioux City to State of Washington for around $693.

What is the cheapest time of day to depart on your flight to State of Washington?

The cheapest time of day to fly to State of Washington is in the evening when flights can be purchased for as low as $516. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $564 on average. Flights to State of Washington from Sioux City in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

Can stopping save me money on Sioux City to State of Washington flights?

You could potentially save up to 5% on your flight if you consider stops on a Sioux City to State of Washington flight.

Cheap Sioux City to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Sioux City to State of Washington

Direct flights

None
There are no direct flights from Sioux City to State of Washington. There are no popular flight routes from Sioux City to State of Washington.
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  • When did momondo last update prices for flights from Sioux City Sioux Gateway Airport to Washington?

    Prices for flights from Sioux City Sioux Gateway Airport to Washington are updated daily.

  • How old do you have to be to fly from Sioux City Sioux Gateway Airport to Washington?

    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 Washington.

  • What documentation or ID do you need to fly to Washington?

    The required travel and health documents for your Washington trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Sioux City to Washington?

It is quick and easy to find Sioux City to Washington flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington that suits you.

Can I find flights from Sioux City to Washington with flexible booking policies on momondo?

Yes. All flights to Washington from Sioux City on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Sioux City to Washington?

momondo provides multiple filters to help you find the best flight to Washington from Sioux City. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Sioux City to Washington right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Sioux City to Washington flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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