Map of flight path and driving directions from Chicago to Fort Smith.
Shortest flight path between Chicago O'Hare International Airport (ORD) and Fort Smith Regional Airport (FSM).
How far is Fort Smith from Chicago?
There are several ways to calculate distances between Chicago and Fort Smith. Here are two common methods:Vincenty's formula (applied above)
- 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 – the shortest distance between two points).
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 110 kg (242 pounds).
Frequent Flyer Miles Calculator
Chicago (ORD) → Fort Smith (FSM).