$183 Cheap Flights from Sidney (SDY) to Spokane (GEG)

View $183 flight on Tue, Sep 9, 2025Opens in a new window

Popular airlines from Sidney, MT (SDY-Sidney-Richland Municipal) to Spokane International Airport (GEG)

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Cheap Flights from Sidney to Spokane (SDY-GEG)

Prices were available within the past 7 days and start at $183 for one-way flights and $366 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Cape Air
Sat, Aug 30 - Tue, Sep 2
SDY
Sidney
GEG
Spokane
$366 Roundtrip, found 1 day ago
$366
Roundtrip
found 1 day ago
Select Cape Air flight, departing Sat, Aug 30 from Sidney to Spokane, returning Tue, Sep 2, priced at $366 found 1 day ago
Cape Air
Thu, Aug 28 - Tue, Sep 2
SDY
Sidney
GEG
Spokane
$415 Roundtrip, found 1 day ago
$415
Roundtrip
found 1 day ago
Select Cape Air flight, departing Thu, Aug 28 from Sidney to Spokane, returning Tue, Sep 2, priced at $415 found 1 day ago
Cape Air
Sat, Aug 30 - Wed, Sep 3
SDY
Sidney
GEG
Spokane
$436 Roundtrip, found 1 day ago
$436
Roundtrip
found 1 day ago
Select Cape Air flight, departing Sat, Aug 30 from Sidney to Spokane, returning Wed, Sep 3, priced at $436 found 1 day ago
Cape Air
Sat, Aug 30 - Thu, Sep 4
SDY
Sidney
GEG
Spokane
$445 Roundtrip, found 1 day ago
$445
Roundtrip
found 1 day ago
Select Cape Air flight, departing Sat, Aug 30 from Sidney to Spokane, returning Thu, Sep 4, priced at $445 found 1 day ago
Cape Air
Wed, Aug 27 - Fri, Aug 29
SDY
Sidney
GEG
Spokane
$463 Roundtrip, found 1 day ago
$463
Roundtrip
found 1 day ago
Select Cape Air flight, departing Wed, Aug 27 from Sidney to Spokane, returning Fri, Aug 29, priced at $463 found 1 day ago
Cape Air
Fri, Aug 29 - Mon, Sep 1
SDY
Sidney
GEG
Spokane
$594 Roundtrip, found 1 day ago
$594
Roundtrip
found 1 day ago
Select Cape Air flight, departing Fri, Aug 29 from Sidney to Spokane, returning Mon, Sep 1, priced at $594 found 1 day ago
Cape Air
Fri, Aug 29 - Mon, Sep 1
SDY
Sidney
GEG
Spokane
$615 Roundtrip, found 1 day ago
$615
Roundtrip
found 1 day ago
Select Cape Air flight, departing Fri, Aug 29 from Sidney to Spokane, returning Mon, Sep 1, priced at $615 found 1 day ago
Cape Air
Fri, Aug 29 - Mon, Sep 1
SDY
Sidney
GEG
Spokane
$634 Roundtrip, found 1 day ago
$634
Roundtrip
found 1 day ago
Select Cape Air flight, departing Fri, Aug 29 from Sidney to Spokane, returning Mon, Sep 1, priced at $634 found 1 day ago
Cape Air
Fri, Aug 29 - Mon, Sep 1
SDY
Sidney
GEG
Spokane
$643 Roundtrip, found 1 day ago
$643
Roundtrip
found 1 day ago
Select Cape Air flight, departing Fri, Aug 29 from Sidney to Spokane, returning Mon, Sep 1, priced at $643 found 1 day ago
Cape Air
Fri, Aug 29 - Mon, Sep 1
SDY
Sidney
GEG
Spokane
$668 Roundtrip, found 1 day ago
$668
Roundtrip
found 1 day ago
Select Cape Air flight, departing Fri, Aug 29 from Sidney to Spokane, returning Mon, Sep 1, priced at $668 found 1 day ago
Flights from Sidney (SDY) to Spokane (GEG)
Origin airport
Sidney-Richland Municipal
Destination airport
Spokane Intl.
Roundtrip price
$365
Distance
620 mi

Sidney to Spokane Flights

The cheapest times to fly from Sidney to Spokane

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 Sidney to Spokane are during the month of August. You can find some of the cheapest flights from Sidney to Spokane with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Sidney to Spokane

Sunday is one of the best days to book for cheap flights from Sidney to Spokane: 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 Sidney to Spokane

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 Sidney to Spokane in 2025. You can also book with separate airlines for your outbound and return journeys, from $183 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 Sidney to Spokane 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 Sidney to Spokane 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 Sidney-Richland Municipal Airport (SDY) to Spokane Intl. Airport (GEG) cost?
Discover the latest flight deals from SDY to GEG by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SDY to GEG?
The cheapest flights from SDY to GEG are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SDY to GEG?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SDY to GEG. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Sidney-Richland Municipal Airport (SDY) to Spokane Intl. Airport (GEG)?
Nonstop flights from Sidney-Richland Municipal Airport (SDY) to Spokane Intl. Airport (GEG) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SDY to GEG?
Generally you'll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can vary based on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Sidney-Richland Municipal Airport (SDY) to Spokane Intl. Airport (GEG)?
Select a flight from Sidney-Richland Municipal Airport (SDY) to Spokane Intl. Airport (GEG) that takes off 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 Sidney-Richland Municipal Airport (SDY) to Spokane Intl. Airport (GEG) last-minute?
Last-minute fares from SDY to GEG are generally more expensive. For the best rates, start looking for flights as soon as possible. That being said, if you can play around with your travel dates, you may find a cheap ticket right before your trip.
Is it cheaper to book a SDY to GEG flight and hotel package?
You'll generally save money by booking a SDY to GEG 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 convenient place. After choosing your preferred accommodations and flights, you can add extras such as car rentals, activities and tours.
Can I cancel or change the date of my flight from Sidney-Richland Municipal Airport (SDY) to Spokane Intl. Airport (GEG)?
Typically, it's possible to cancel or reschedule your SDY to GEG flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more details on our Customer Service portal.

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Sidney nearby Airports

Williston

Basin Intl. to Spokane
$237.97
*Available to One Key members.