Map of flight path and driving directions from Sioux City to Fort Smith.
Shortest flight path between Sioux Gateway Airport (SUX) and Fort Smith Regional Airport (FSM).
How far is Fort Smith from Sioux City?
There are several ways to calculate distances between Sioux City and Fort Smith. Here are two common methods:Vincenty's formula (applied above)
- 499.360 miles
- 803.641 kilometers
- 433.932 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
- 500.081 miles
- 804.803 kilometers
- 434.559 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 Sioux City and Fort Smith.
Sioux City, IA
Fort Smith, AR
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 99 kg (217 pounds).
Frequent Flyer Miles Calculator
Sioux City (SUX) → Fort Smith (FSM).