# Distance between Rock Springs, WY (RKS) and Fort Smith, AR (FSM)

Flight distance from Rock Springs to Fort Smith (Southwest Wyoming Regional Airport – Fort Smith Regional Airport) is 905 miles / 1456 kilometers / 786 nautical miles. Estimated flight time is 2 hours 12 minutes.

Driving distance from Rock Springs (RKS) to Fort Smith (FSM) is 1160 miles / 1867 kilometers and travel time by car is about 18 hours 57 minutes.

## Map of flight path and driving directions from Rock Springs to Fort Smith.

Shortest flight path between Southwest Wyoming Regional Airport (RKS) and Fort Smith Regional Airport (FSM).

## How far is Fort Smith from Rock Springs?

There are several ways to calculate distances between Rock Springs and Fort Smith. Here are two common methods:

Vincenty's formula (applied above)
• 904.655 miles
• 1455.901 kilometers
• 786.124 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
• 903.324 miles
• 1453.759 kilometers
• 784.967 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 Southwest Wyoming Regional Airport
City: Rock Springs, WY
Country: United States
IATA Code: RKS
ICAO Code: KRKS
Coordinates: 41°35′39″N, 109°3′54″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

The time difference between Rock Springs and Fort Smith is 1 hour. Fort Smith is 1 hour ahead of Rock Springs.

MDT

CDT

## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 144 kg (317 pounds).

## Frequent Flyer Miles Calculator

Rock Springs (RKS) → Fort Smith (FSM).

Distance:
905
Elite level bonus:
0
Booking class bonus:
0

### In total

Total frequent flyer miles:
905

Round trip?