$191 Cheap Flights from Rapid City (RAP) to Boise (BOI)

View $191 flight on Wed, Sep 23, 2026Opens in a new window

Popular airlines from Rapid City Regional Airport (RAP) to Boise Airport (BOI)

Cheap Flights from Rapid City to Boise (RAP-BOI)

Prices were available within the past 7 days and start at $191 for one-way flights and $249 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Dec 9 - Tue, Dec 16
RAP
Rapid City
BOI
Boise
$249 Roundtrip, found 14 hours ago
$249
Roundtrip
found 14 hours ago
Select Delta flight, departing Tue, Dec 9 from Rapid City to Boise, returning Tue, Dec 16, priced at $249 found 14 hours ago
Delta
Thu, Dec 4 - Fri, Dec 12
RAP
Rapid City
BOI
Boise
$254 Roundtrip, found 3 days ago
$254
Roundtrip
found 3 days ago
Select Delta flight, departing Thu, Dec 4 from Rapid City to Boise, returning Fri, Dec 12, priced at $254 found 3 days ago
United
Fri, Dec 5 - Mon, Dec 8
RAP
Rapid City
BOI
Boise
$268 Roundtrip, found 2 days ago
$268
Roundtrip
found 2 days ago
Select United flight, departing Fri, Dec 5 from Rapid City to Boise, returning Mon, Dec 8, priced at $268 found 2 days ago
Delta
Thu, Dec 25 - Wed, Jan 7
RAP
Rapid City
BOI
Boise
$269 Roundtrip, found 6 days ago
$269
Roundtrip
found 6 days ago
Select Delta flight, departing Thu, Dec 25 from Rapid City to Boise, returning Wed, Jan 7, priced at $269 found 6 days ago
United
Fri, Feb 20 - Sat, Feb 21
RAP
Rapid City
BOI
Boise
$270 Roundtrip, found 4 days ago
$270
Roundtrip
found 4 days ago
Select United flight, departing Fri, Feb 20 from Rapid City to Boise, returning Sat, Feb 21, priced at $270 found 4 days ago
Delta
Wed, Nov 26 - Thu, Nov 27
RAP
Rapid City
BOI
Boise
$279 Roundtrip, found 1 day ago
$279
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Nov 26 from Rapid City to Boise, returning Thu, Nov 27, priced at $279 found 1 day ago
Delta
Thu, Dec 25 - Tue, Jan 13
RAP
Rapid City
BOI
Boise
$284 Roundtrip, found 6 days ago
$284
Roundtrip
found 6 days ago
Select Delta flight, departing Thu, Dec 25 from Rapid City to Boise, returning Tue, Jan 13, priced at $284 found 6 days ago
United
Fri, Dec 5 - Mon, Dec 8
RAP
Rapid City
BOI
Boise
$288 Roundtrip, found 2 days ago
$288
Roundtrip
found 2 days ago
Select United flight, departing Fri, Dec 5 from Rapid City to Boise, returning Mon, Dec 8, priced at $288 found 2 days ago
United
Fri, Feb 20 - Sat, Feb 21
RAP
Rapid City
BOI
Boise
$290 Roundtrip, found 4 days ago
$290
Roundtrip
found 4 days ago
Select United flight, departing Fri, Feb 20 from Rapid City to Boise, returning Sat, Feb 21, priced at $290 found 4 days ago
American Airlines
Tue, Dec 9 - Tue, Dec 16
RAP
Rapid City
BOI
Boise
$335 Roundtrip, found 14 hours ago
$335
Roundtrip
found 14 hours ago
Select American Airlines flight, departing Tue, Dec 9 from Rapid City to Boise, returning Tue, Dec 16, priced at $335 found 14 hours ago

Find the cheapest month to fly from Rapid City (RAP) to Boise (BOI)

July is typically the cheapest month to fly

From $248 - $467 per traveler.

Alternative airports near Boise

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Boise Airport BOI. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $856
BOI
Boise Airport
CheapestClosest
Average driving time to city center8 min
Flights from $856

Frequently asked questions

How much does a flight from Rapid City Regional Airport (RAP) to Boise Airport (BOI) cost?
Grab a cheap one-way flight from $191 or cheap return flight from $249 from Rapid City Regional Airport (RAP) to Boise Airport (BOI) 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 Rapid City Regional Airport (RAP) to Boise Airport (BOI)?
Flying in December is a great way to save, as it's the cheapest month for flights between RAP and BOI. You'll typically find the lowest prices during the off-season.
What is the cheapest airline that flies from Rapid City Regional Airport (RAP) to Boise Airport (BOI)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest RAP to BOI flight.
How many flights per day from Rapid City Regional Airport (RAP) to Boise Airport (BOI)?
There are no daily direct flights departing from Rapid City Regional Airport (RAP) to Boise Airport (BOI). But you can opt for flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from RAP to BOI?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*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 Boise Airport (BOI)?
Opt for a flight from Rapid City Regional Airport (RAP) to Boise Airport (BOI) that takes off before 3 PM to reduce the risk of cancellations. Later departures 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 Rapid City Regional Airport (RAP) to Boise Airport (BOI) last-minute?
Last-minute bookings from RAP to BOI are typically more expensive. For the best rates, start looking for flights early. That said, if you can play around with your travel dates, you may find a cheap ticket just before your departure.
Is it cheaper to book a RAP to BOI flight and hotel package?
Booking a RAP to BOI flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Choose from our extensive range of hotels and then add flights, car rentals and activities to your booking. Bundle everything 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 Boise Airport (BOI)?
If you reserved your RAP to BOI flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the fare type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for further details.

Travel information

Origin airport
Rapid City Regional
Destination airport
Boise
Airlines serving
American Airlines, Delta, United
Roundtrip price
$248
Distance
656 mi

Book with confidence

Rapid City to Boise Flights

The cheapest times to fly from Rapid City to Boise

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

 

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

Sunday is one of the best days to book for cheap flights from Rapid City to Boise: 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 Boise

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 Boise in 2025. You can also book with separate airlines for your outbound and return journeys, from $191 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 Boise 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 Boise 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 Boise Flights

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*Available to One Key members.