$335 Cheap Flights from Spokane (GEG) to Sioux City (SUX)

View $335 flight on Wed, Sep 17, 2025Opens in a new window

Popular airlines from Spokane International Airport (GEG) to Sioux City, IA (SUX-Sioux Gateway)

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Cheap Flights from Spokane to Sioux City (GEG-SUX)

Prices were available within the past 7 days and start at $335 for one-way flights and $354 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Sep 16 - Sat, Oct 4
GEG
Spokane
SUX
Sioux City
$354 Roundtrip, found 1 day ago
$354
Roundtrip
found 1 day ago
Select United flight, departing Tue, Sep 16 from Spokane to Sioux City, returning Sat, Oct 4, priced at $354 found 1 day ago
United
Tue, Oct 28 - Tue, Nov 18
GEG
Spokane
SUX
Sioux City
$432 Roundtrip, found 1 day ago
$432
Roundtrip
found 1 day ago
Select United flight, departing Tue, Oct 28 from Spokane to Sioux City, returning Tue, Nov 18, priced at $432 found 1 day ago
United
Wed, Oct 29 - Tue, Nov 18
GEG
Spokane
SUX
Sioux City
$435 Roundtrip, found 1 day ago
$435
Roundtrip
found 1 day ago
Select United flight, departing Wed, Oct 29 from Spokane to Sioux City, returning Tue, Nov 18, priced at $435 found 1 day ago
United
Sat, Oct 4 - Wed, Oct 22
GEG
Spokane
SUX
Sioux City
$440 Roundtrip, found 1 day ago
$440
Roundtrip
found 1 day ago
Select United flight, departing Sat, Oct 4 from Spokane to Sioux City, returning Wed, Oct 22, priced at $440 found 1 day ago
United
Thu, Oct 30 - Tue, Nov 18
GEG
Spokane
SUX
Sioux City
$447 Roundtrip, found 1 day ago
$447
Roundtrip
found 1 day ago
Select United flight, departing Thu, Oct 30 from Spokane to Sioux City, returning Tue, Nov 18, priced at $447 found 1 day ago
United
Sat, Oct 4 - Sat, Oct 18
GEG
Spokane
SUX
Sioux City
$452 Roundtrip, found 1 day ago
$452
Roundtrip
found 1 day ago
Select United flight, departing Sat, Oct 4 from Spokane to Sioux City, returning Sat, Oct 18, priced at $452 found 1 day ago
United
Tue, Sep 16 - Fri, Oct 3
GEG
Spokane
SUX
Sioux City
$456 Roundtrip, found 1 day ago
$456
Roundtrip
found 1 day ago
Select United flight, departing Tue, Sep 16 from Spokane to Sioux City, returning Fri, Oct 3, priced at $456 found 1 day ago
United
Tue, Sep 16 - Sat, Sep 27
GEG
Spokane
SUX
Sioux City
$457 Roundtrip, found 2 days ago
$457
Roundtrip
found 2 days ago
Select United flight, departing Tue, Sep 16 from Spokane to Sioux City, returning Sat, Sep 27, priced at $457 found 2 days ago
United
Tue, Sep 9 - Sat, Sep 13
GEG
Spokane
SUX
Sioux City
$459 Roundtrip, found 4 hours ago
$459
Roundtrip
found 4 hours ago
Select United flight, departing Tue, Sep 9 from Spokane to Sioux City, returning Sat, Sep 13, priced at $459 found 4 hours ago
United
Tue, Sep 23 - Mon, Oct 13
GEG
Spokane
SUX
Sioux City
$462 Roundtrip, found 1 day ago
$462
Roundtrip
found 1 day ago
Select United flight, departing Tue, Sep 23 from Spokane to Sioux City, returning Mon, Oct 13, priced at $462 found 1 day ago

Alternative airports near Sioux City

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Sioux Gateway SUX. Cheapest and Closest option available. Average driving time to city center is 9 minutes. Flights from $540
SUX
Sioux Gateway
CheapestClosest
Average driving time to city center9 min
Flights from $540
Flights from Spokane (GEG) to Sioux City (SUX)
Origin airport
Spokane Intl.
Destination airport
Sioux Gateway
Airlines serving
United
Roundtrip price
$353
Distance
1090 mi

Spokane to Sioux City Flights

The cheapest times to fly from Spokane to Sioux City

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Spokane to Sioux City are during the month of September. You can find some of the cheapest flights from Spokane to Sioux City with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Spokane to Sioux City

Sunday is one of the best days to book for cheap flights from Spokane to Sioux City: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Spokane to Sioux City

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Spokane to Sioux City in 2025. You can also book with separate airlines for your outbound and return journeys, from $335 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Spokane to Sioux City flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Spokane to Sioux City airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Spokane Intl. Airport (GEG) to Sioux Gateway Airport (SUX) cost?
Snag a cheap one-way flight from $335 or cheap return flight from $354 from Spokane Intl. Airport (GEG) to Sioux Gateway Airport (SUX) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Spokane Intl. Airport (GEG) to Sioux Gateway Airport (SUX)?
September is the least expensive month to fly from GEG to SUX. Timing your trip outside of the busy season is often the key to finding better fares.
What is the cheapest airline that flies from Spokane Intl. Airport (GEG) to Sioux Gateway Airport (SUX)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest GEG to SUX flight.
How many flights per day from Spokane Intl. Airport (GEG) to Sioux Gateway Airport (SUX)?
There aren't any daily nonstop flights available from Spokane Intl. Airport (GEG) to Sioux Gateway Airport (SUX). But you can opt for flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be on your way in no time at all.
What day of the week has the most flights from GEG to SUX?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Spokane Intl. Airport (GEG) to Sioux Gateway Airport (SUX)?
Choose a flight from Spokane Intl. Airport (GEG) to Sioux Gateway Airport (SUX) that leaves before 3 PM to reduce the likelihood of delays. Departures after this time have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Spokane Intl. Airport (GEG) to Sioux Gateway Airport (SUX) last-minute?
Holding off until right before your break to book a flight from GEG to SUX often results in higher prices. While you may come across some last-minute offers, there's no guarantee. Be flexible with your travel plans for the best chance of scoring a bargain.
Is it cheaper to book a GEG to SUX flight and hotel package?
You'll typically save money by securing a GEG to SUX flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one place. After choosing your ideal accommodations and flights, you can add extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Spokane Intl. Airport (GEG) to Sioux Gateway Airport (SUX)?
In most cases, you can reschedule or cancel your GEG to SUX flight. However, there may be additional charges, especially if you made your booking more than 24 hours ago. Check your itinerary for the airline's rules and fees on flight changes, or if you want more information, head to our Customer Service portal.

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*Available to One Key members.