Cheap Flights from Rapid City (RAP) to Sidney (SDY)

Popular airlines from Rapid City Regional Airport (RAP) to Sidney, MT (SDY-Sidney-Richland Municipal)

Frequently asked questions

How much does a flight from Rapid City Regional Airport (RAP) to Sidney-Richland Municipal Airport (SDY) cost?
Lock in a cheap one-way flight or cheap return flight from Rapid City Regional Airport (RAP) to Sidney-Richland Municipal Airport (SDY) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Rapid City Regional Airport (RAP) to Sidney-Richland Municipal Airport (SDY)?
The cheapest month to fly from RAP to SDY is , when there's less demand. Off-peak season is often when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Rapid City Regional Airport (RAP) to Sidney-Richland Municipal Airport (SDY)?
Use the filters on Expedia to compare airlines and find the most affordable carrier that'll fly you from RAP to SDY. Then, sort your results by "Price (lowest to highest)" to snap up the best deal available.
How many flights per day from Rapid City Regional Airport (RAP) to Sidney-Richland Municipal Airport (SDY)?
Direct flights from Rapid City Regional Airport (RAP) to Sidney-Richland Municipal Airport (SDY) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from RAP to SDY?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be 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 Rapid City Regional Airport (RAP) to Sidney-Richland Municipal Airport (SDY)?
Book a flight from Rapid City Regional Airport (RAP) 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 Rapid City Regional Airport (RAP) to Sidney-Richland Municipal Airport (SDY) last-minute?
Last-minute bookings from RAP to SDY are typically more expensive. To lock in the cheapest rates, start looking for flights well ahead of time. That said, if you're flexible with your travel plans, you may find a cheap fare right before your journey.
Is it cheaper to book a RAP to SDY flight and hotel package?
Opting for a RAP to SDY flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Pick from our wide range of accommodations and then add flights, activities and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Rapid City Regional Airport (RAP) to Sidney-Richland Municipal Airport (SDY)?
If you reserved your RAP to SDY flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for further details.

Travel information

Origin airport
Rapid City Regional
Destination airport
Sidney-Richland Municipal
Distance
259 mi

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Rapid City to Sidney Flights

The cheapest times to fly from Rapid City 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 Rapid City to Sidney are during the month of . You can find some of the cheapest flights from Rapid City to Sidney with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Rapid City to Sidney

Sunday is one of the best days to book for cheap flights from Rapid City 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 Rapid City 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 Rapid City to Sidney in 2025. 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 Rapid City 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 Rapid City 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.

 

Rapid City to Sidney Flights

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*Available to One Key members.