Calculations with different methods
- 575.869 miles
- 926.772 kilometers
- 500.417 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
- 575.969 miles
- 926.932 kilometers
- 500.503 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 Fort Smith Regional Airport (FSM) is 1 hour 35 minutes.
Time difference and current local times
There is no time difference between Chicago and Fort Smith.
Fort Smith, AR
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 100 kg (220 pounds).
Chicago to Fort Smith flight map.
Frequent Flyer Miles Calculator
Chicago (ORD) → Fort Smith (FSM).