Distance between Casper, WY (CPR) and Rapid City, SD (RAP)
Flight distance from Casper to Rapid City (Casper–Natrona County International Airport – Rapid City Regional Airport) is 188 miles / 303 kilometers / 164 nautical miles. Estimated flight time is 51 minutes.
Driving distance from Casper (CPR) to Rapid City (RAP) is 267 miles / 430 kilometers and travel time by car is about 4 hours 48 minutes.
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Multiple airports
Casper - Rapid City
Map of flight path and driving directions from Casper to Rapid City.
Shortest flight path between Casper–Natrona County International Airport (CPR) and Rapid City Regional Airport (RAP).
How far is Rapid City from Casper?
There are several ways to calculate distances between Casper and Rapid City. Here are two common methods:
Vincenty's formula (applied above)- 188.400 miles
- 303.200 kilometers
- 163.715 nautical miles
Vincenty's formula calculates the distance between latitude/longitude points on the earth’s surface, using an ellipsoidal model of the earth.
Haversine formula- 188.007 miles
- 302.568 kilometers
- 163.374 nautical miles
The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance – the shortest distance between two points).
Airport information
| A | Casper–Natrona County International Airport |
|---|---|
| City: | Casper, WY |
| Country: | United States  |
| IATA Code: | CPR |
| ICAO Code: | KCPR |
| Coordinates: | 42°54′28″N, 106°27′50″W |
| B | Rapid City Regional Airport |
|---|---|
| City: | Rapid City, SD |
| Country: | United States |
| IATA Code: | RAP |
| ICAO Code: | KRAP |
| Coordinates: | 44°2′43″N, 103°3′25″W |
Time difference and current local times
There is no time difference between Casper and Rapid City.
Time Difference
Casper, WY
Rapid City, SD
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 53 kg (116 pounds).
Frequent Flyer Miles Calculator
Casper (CPR) → Rapid City (RAP).
In total
Round trip?