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 Rapid City Regional Airport (RAP) to O'Hare International Airport (ORD) is 1 hour 58 minutes.
Time difference and current local times
The time difference between Rapid City and Chicago is 1 hour. Chicago is 1 hour ahead of Rapid City.
Rapid City, SD
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 120 kg (265 pounds).
Rapid City to Chicago flight map.
Frequent Flyer Miles Calculator
Rapid City (RAP) → Chicago (ORD).