# Distance between Sioux City, IA (SUX) and Fort Smith, AR (FSM)

Flight distance from Sioux City to Fort Smith (Sioux Gateway Airport – Fort Smith Regional Airport) is 499 miles / 804 kilometers / 434 nautical miles. Estimated flight time is 1 hour 26 minutes.

Driving distance from Sioux City (SUX) to Fort Smith (FSM) is 559 miles / 900 kilometers and travel time by car is about 9 hours 46 minutes.

## 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).

## Airport information

A Sioux Gateway Airport
City: Sioux City, IA
Country: United States
IATA Code: SUX
ICAO Code: KSUX
Coordinates: 42°24′9″N, 96°23′3″W

B Fort Smith Regional Airport
City: Fort Smith, AR
Country: United States
IATA Code: FSM
ICAO Code: KFSM
Coordinates: 35°20′11″N, 94°22′2″W

## Time difference and current local times

There is no time difference between Sioux City and Fort Smith.

CST

CST

## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 99 kg (217 pounds).

## Frequent Flyer Miles Calculator

Sioux City (SUX) → Fort Smith (FSM).

Distance:
499
Elite level bonus:
0
Booking class bonus:
0

### In total

Total frequent flyer miles:
499

Round trip?