Cheap Flights from Champaign (CMI) to Sidney (SDY)

Popular airlines from Champaign, IL (CMI-University Of Illinois Urbana-Champaign Williard) to Sidney, MT (SDY-Sidney-Richland Municipal)

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Cheap Flights from Champaign to Sidney (CMI-SDY)

Prices were available within the past 7 days and start at for one-way flights and $1,082 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Thu, Dec 25 - Fri, Jan 2
CMI
Champaign
SDY
Sidney
$1,082 Roundtrip, found 4 days ago
$1,082
Roundtrip
found 4 days ago
Select American Airlines flight, departing Thu, Dec 25 from Champaign to Sidney, returning Fri, Jan 2, priced at $1,082 found 4 days ago

Frequently asked questions

How much does a flight from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Sidney-Richland Municipal Airport (SDY) cost?
Lock in a cheap one-way flight or cheap return flight from $1,082 from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Sidney-Richland Municipal Airport (SDY) 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 University Of Illinois Urbana-Champaign Williard Airport (CMI) to Sidney-Richland Municipal Airport (SDY)?
December is the cheapest month to fly from CMI to SDY. Traveling during an off-peak travel window is often the key to landing a great deal.
What is the cheapest airline that flies from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Sidney-Richland Municipal Airport (SDY)?
To find the cheapest airline flying from CMI to SDY, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Sidney-Richland Municipal Airport (SDY)?
There are no daily direct flights available from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Sidney-Richland Municipal Airport (SDY). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from CMI to SDY?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can vary based on a number of factors, such as the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Sidney-Richland Municipal Airport (SDY)?
Select a flight from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Sidney-Richland Municipal Airport (SDY) that takes off before 3 PM to reduce the risk of cancellations and delays. Departures after this time are on average 22% more likely to be canceled.**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 University Of Illinois Urbana-Champaign Williard Airport (CMI) to Sidney-Richland Municipal Airport (SDY) last-minute?
Booking your plane ticket from CMI to SDY shortly before your journey is typically more expensive. However, if there's some wiggle room with your departure times and dates, you could land a cheap last-minute fare.
Is it cheaper to book a CMI to SDY flight and hotel package?
Compared with arranging hotels and flights separately, booking a CMI to SDY flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one convenient place will take the stress out of travel planning. Simply pick your flights and choose from our wide range of stays, then tailor your trip with other add-ons like car rentals and activities.
Can I cancel or change the date of my flight from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Sidney-Richland Municipal Airport (SDY)?
You can usually reschedule or cancel your CMI to SDY flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
University Of Illinois Urbana-Champaign Williard
Destination airport
Sidney-Richland Municipal
Roundtrip price
$1,082
Distance
950 mi

Book with confidence

Champaign to Sidney Flights

The cheapest times to fly from Champaign to Sidney

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

 

The best time to book a flight from Champaign to Sidney

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

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 Champaign to Sidney in 2026. You can also book with separate airlines for your outbound and return journeys, from 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 Champaign to Sidney 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 Champaign to Sidney 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.

 

Champaign to Sidney Flights

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*Available to One Key members.