The cheapest times to fly from RAP to BOI are

  • January 1st to February 4th
  • February 19th to March 11th (except the week of February 26th)
  • June 18th to July 15th
  • August 13th to November 18th

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from RAP to BOI is late August to early September. Prices can be as high as $609 for Sunday flights during late May, or as low as $214 for Tuesday flights around late August to early September.


When to Fly to Boise

Flying from Rapid City, SD (RAP) to Boise, ID (BOI) will usually cost between $259 to $489 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late August to early September with an average ticket price of $298. Due to high demand the most expensive time to fly is late May, with an average price of $484. Planning your trip to low-cost times can easily save you $186 on economy flights and even more on first-class flights. Generally, any price below $366 can be considered a good price for a round-trip RAP to BOI flight.

See below for a graph of average weekly prices for the RAP to BOI route. All prices are for round-trip tickets in USD.

RAP to BOI Flight Prices

Compared to other flights, the RAP to BOI flight is much cheaper than the average and costs less than the average flight leaving from Rapid City. The average price per mile (for a direct flight) is $0.35, which is in the normal range for a flight.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to fly to BOI, and Wednesday the cheapest day to fly back into RAP. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $93 (23%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $314. Return trip prices are from the BOI to RAP flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from RAP to BOI can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 2 hour 10 minutes may not be realistic.


Flight Questions Answered

Still have questions about flying from RAP to BOI? We’ve got answers.

Which airlines fly this route?

You can find 4 major airlines flying this route most often: Alaska, American, Delta, United, and potentially more during busy seasons.

How far away is it from Boise Air Terminal Airport to Rapid City Regional Airport?

The distance between the two airports is roughly 657 miles or 1057 kilometers.

How long does it take to fly from RAP to BOI?

The real-world flight time for a nonstop RAP to BOI flight is about 2 hour 10 minutes.

How many flights go between Rapid City, SD and Boise, ID?

It depends on the day of the week and the date, but a typical day might have around 92 available flights from RAP to BOI.


Airport Location Info


Departing Airport

Origination codeRAP
Origination airport nameRapid City Regional Airport
CityRapid City, SD
Countrythe United States

Return Airport

Destination codeBOI
Destination airport nameBoise Air Terminal Airport
CityBoise, ID
Countrythe United States


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.