$256 Cheap Flights from Santa Rosa (STS) to Rapid City (RAP)

View $256 flight on Tue, Jun 2, 2026Opens in a new window

Popular airlines from Santa Rosa, CA (STS-Sonoma County) to Rapid City Regional Airport (RAP)

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Cheap Flights from Santa Rosa to Rapid City (STS-RAP)

Prices were available within the past 7 days and start at $256 for one-way flights and $794 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Dec 31 - Fri, Jan 9
STS
Santa Rosa
RAP
Rapid City
$794 Roundtrip, found 1 hour ago
$794
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Wed, Dec 31 from Santa Rosa to Rapid City, returning Fri, Jan 9, priced at $794 found 1 hour ago
American Airlines
Sun, May 31 - Mon, Jun 1
STS
Santa Rosa
RAP
Rapid City
$841 Roundtrip, found 5 days ago
$841
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sun, May 31 from Santa Rosa to Rapid City, returning Mon, Jun 1, priced at $841 found 5 days ago
American Airlines
Sun, May 31 - Mon, Jun 1
STS
Santa Rosa
RAP
Rapid City
$981 Roundtrip, found 5 days ago
$981
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sun, May 31 from Santa Rosa to Rapid City, returning Mon, Jun 1, priced at $981 found 5 days ago
American Airlines
Sun, May 31 - Mon, Jun 1
STS
Santa Rosa
RAP
Rapid City
$993 Roundtrip, found 5 days ago
$993
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sun, May 31 from Santa Rosa to Rapid City, returning Mon, Jun 1, priced at $993 found 5 days ago
American Airlines
Sun, May 31 - Mon, Jun 1
STS
Santa Rosa
RAP
Rapid City
$1,043 Roundtrip, found 5 days ago
$1,043
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sun, May 31 from Santa Rosa to Rapid City, returning Mon, Jun 1, priced at $1,043 found 5 days ago
American Airlines
Fri, Jan 2 - Sun, Jan 4
STS
Santa Rosa
RAP
Rapid City
$2,108 Roundtrip, found 1 hour ago
$2,108
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Fri, Jan 2 from Santa Rosa to Rapid City, returning Sun, Jan 4, priced at $2,108 found 1 hour ago
American Airlines
Fri, Jan 2 - Sun, Jan 4
STS
Santa Rosa
RAP
Rapid City
$2,247 Roundtrip, found 1 hour ago
$2,247
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Fri, Jan 2 from Santa Rosa to Rapid City, returning Sun, Jan 4, priced at $2,247 found 1 hour ago
American Airlines
Fri, Jan 2 - Sun, Jan 4
STS
Santa Rosa
RAP
Rapid City
$2,253 Roundtrip, found 1 hour ago
$2,253
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Fri, Jan 2 from Santa Rosa to Rapid City, returning Sun, Jan 4, priced at $2,253 found 1 hour ago
American Airlines
Fri, Jan 2 - Sun, Jan 4
STS
Santa Rosa
RAP
Rapid City
$2,812 Roundtrip, found 1 hour ago
$2,812
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Fri, Jan 2 from Santa Rosa to Rapid City, returning Sun, Jan 4, priced at $2,812 found 1 hour ago
Flights from Santa Rosa (STS) to Rapid City (RAP)
Origin airport
Sonoma County
Destination airport
Rapid City Regional
Roundtrip price
$793
Distance
1091 mi

Santa Rosa to Rapid City Flights

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

 

The best time to book a flight from Santa Rosa to Rapid City

Sunday is one of the best days to book for cheap flights from Santa Rosa to Rapid 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 Santa Rosa to Rapid 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 Santa Rosa to Rapid City in 2026. You can also book with separate airlines for your outbound and return journeys, from $256 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 Santa Rosa to Rapid 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 Santa Rosa to Rapid 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 Sonoma County Airport (STS) to Rapid City Regional Airport (RAP) cost?
Lock in a cheap one-way flight from $256 or cheap return flight from $794 from Sonoma County Airport (STS) to Rapid City Regional Airport (RAP) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Sonoma County Airport (STS) to Rapid City Regional Airport (RAP)?
The cheapest month to fly from STS to RAP is December, when there's less demand. Off-peak months are usually when airlines offer better prices between these airports.
What is the cheapest airline that flies from Sonoma County Airport (STS) to Rapid City Regional Airport (RAP)?
To find the cheapest airline flying from STS to RAP, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Sonoma County Airport (STS) to Rapid City Regional Airport (RAP)?
You'll have to catch a flight with a layover when traveling from Sonoma County Airport (STS) to Rapid City Regional Airport (RAP). There are no daily direct flights on this route. However, just filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from STS to RAP?
Typically you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can vary depending 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 Sonoma County Airport (STS) to Rapid City Regional Airport (RAP)?
To arrive at Rapid City Regional Airport (RAP) on time, select a flight that takes off from Sonoma County Airport (STS) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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 Sonoma County Airport (STS) to Rapid City Regional Airport (RAP) last-minute?
Last-minute bookings from STS to RAP are typically more expensive. To secure the lowest prices, start searching for flights early. That being said, if you're flexible with your travel plans, it's possible to find a cheap fare right before your journey.
Is it cheaper to book a STS to RAP flight and hotel package?
You'll generally save money by securing a STS to RAP flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. After choosing your preferred flights and accommodations, you can add extras like car rentals, tours and activities.
Can I cancel or change the date of my flight from Sonoma County Airport (STS) to Rapid City Regional Airport (RAP)?
In most instances, you can reschedule or cancel your STS to RAP flight. However, there may be additional fees, especially if you booked over 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you'd like more details, head to our Customer Service portal.

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*Available to One Key members.