$126 Cheap United flights Spokane (GEG) to Sioux Falls (FSD)

View $126 flight on Tue, Sep 30, 2025Opens in a new window

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$126 Cheap United flights Spokane (GEG) to Sioux Falls (FSD)

Prices were available within the past 7 days and start at $126 for one-way flights and $251 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Sep 10 - Wed, Sep 24
GEG
Spokane
FSD
Sioux Falls
$251 Roundtrip, found 5 days ago
$251
Roundtrip
found 5 days ago
Select United flight, departing Wed, Sep 10 from Spokane to Sioux Falls, returning Wed, Sep 24, priced at $251 found 5 days ago
United
Wed, Sep 10 - Wed, Sep 24
GEG
Spokane
FSD
Sioux Falls
$256 Roundtrip, found 5 days ago
$256
Roundtrip
found 5 days ago
Select United flight, departing Wed, Sep 10 from Spokane to Sioux Falls, returning Wed, Sep 24, priced at $256 found 5 days ago
United
Wed, Sep 10 - Wed, Sep 24
GEG
Spokane
FSD
Sioux Falls
$258 Roundtrip, found 5 days ago
$258
Roundtrip
found 5 days ago
Select United flight, departing Wed, Sep 10 from Spokane to Sioux Falls, returning Wed, Sep 24, priced at $258 found 5 days ago
United
Tue, Aug 26 - Tue, Sep 9
GEG
Spokane
FSD
Sioux Falls
$281 Roundtrip, found 3 days ago
$281
Roundtrip
found 3 days ago
Select United flight, departing Tue, Aug 26 from Spokane to Sioux Falls, returning Tue, Sep 9, priced at $281 found 3 days ago
United
Wed, Dec 24 - Sat, Jan 3
GEG
Spokane
FSD
Sioux Falls
$292 Roundtrip, found 3 days ago
$292
Roundtrip
found 3 days ago
Select United flight, departing Wed, Dec 24 from Spokane to Sioux Falls, returning Sat, Jan 3, priced at $292 found 3 days ago
United
Wed, Sep 10 - Wed, Sep 24
GEG
Spokane
FSD
Sioux Falls
$298 Roundtrip, found 5 days ago
$298
Roundtrip
found 5 days ago
Select United flight, departing Wed, Sep 10 from Spokane to Sioux Falls, returning Wed, Sep 24, priced at $298 found 5 days ago
Flights from Spokane (GEG) to Sioux Falls (FSD)
Origin airport
Spokane Intl.
Destination airport
Sioux Falls Regional
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Popular airline
Delta
Distance
1040 mi

Frequently asked questions

How much is a United Airlines flight from Spokane Intl. Airport (GEG) to Sioux Falls Regional Airport (FSD)?
Scoring cheap one-way United Airlines flights from GEG to FSD from $126 on Expedia couldn't be easier --- just filter by "Price (lowest to highest)." Or check out our affordable return fares from $251 for your next exciting adventure.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from GEG to FSD with United Airlines?
January is one of the least expensive months to fly to Sioux Falls with United Airlines. You could also find excellent prices on one-way and return fares in December.
What is the cheapest time to book flights from Spokane Intl. Airport (GEG) to Sioux Falls Regional Airport (FSD) with United Airlines?
Look for affordable United Airlines flights from Spokane Intl. Airport (GEG) to Sioux Falls Regional Airport (FSD) one to three months before your departure day. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare type and itinerary, the best day to book a domestic flight is generally Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Spokane Intl. Airport (GEG) to Sioux Falls Regional Airport (FSD)?
To see if there's a direct trip from GEG to FSD with United Airlines or another carrier, check the "Nonstop" filter when looking for flights.
What is the earliest United Airlines flight from GEG to FSD?
To find the earliest departure from GEG to FSD with United Airlines, filter your results by "Morning" and "Early Morning." Choosing an early flight generally means you'll experience fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Sioux Falls?
Catch a United Airlines flight from Spokane Intl. Airport (GEG) to Sioux Falls, and you're most likely to land at Sioux Falls Regional Airport (FSD). This is the airline's main hub in this city.
Why fly with United Airlines from GEG to FSD?
A rewarding loyalty program and the opportunity to collect points through United Mileage Plus are the start of the reasons to jet off from GEG to FSD with United Airlines. Plus, when you sign up to our One Key™ program, you can earn OneKeyCash™* alongside United Airlines's loyalty program earnings. It's yours to spend on future travel plans.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my United Airlines flight from Spokane Intl. Airport (GEG) to Sioux Falls Regional Airport (FSD)?
It's generally possible to cancel or reschedule your flight, although there may be additional fees if you made your booking more than 24 hours ago. Prefer to keep your options open? Make use of our "Changes included" and "No cancel fee" filters to find flights that won't penalize you if you have to revise your plans. To modify your booking, go to "Trips," select your flight and click on "Manage Booking" for further information.

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