Calculations with different methods
- 779.542 miles
- 1254.550 kilometers
- 677.403 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
- 777.551 miles
- 1251.347 kilometers
- 675.673 nautical miles
The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance).
Estimated flight time from O'Hare International Airport (ORD) to Rapid City Regional Airport (RAP) is 1 hour 58 minutes.
Time difference and current local times
The time difference between Chicago and Rapid City is 1 hour. Rapid City is 1 hour behind Chicago.
Rapid City, SD
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 120 kg (265 pounds).
Chicago to Rapid City flight map.
Frequent Flyer Miles Calculator
Chicago (ORD) → Rapid City (RAP).