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Chicago–Rapid City | ORD–RAP
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
Chicago to Rapid City flight map.
Frequent Flyer Miles Calculator
Chicago (ORD) → Rapid City (RAP).