Calculations with different methods
- 646.409 miles
- 1040.294 kilometers
- 561.714 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
- 644.826 miles
- 1037.748 kilometers
- 560.339 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 Pierre Regional Airport (PIR) is 1 hour 43 minutes.
Time difference and current local times
There is no time difference between Chicago and Pierre.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 107 kg (236 pounds).
Chicago to Pierre flight map.
Frequent Flyer Miles Calculator
Chicago (ORD) → Pierre (PIR).