# Distance between Rock Springs, WY (RKS) and Springfield, IL (SPI)

Flight distance from Rock Springs to Springfield (Southwest Wyoming Regional Airport – Springfield Abraham Lincoln Capital Airport) is 1023 miles / 1646 kilometers / 889 nautical miles. Estimated flight time is 2 hours 26 minutes.

Driving distance from Rock Springs (RKS) to Springfield (SPI) is 1127 miles / 1814 kilometers and travel time by car is about 18 hours 41 minutes.

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

Shortest flight path between Southwest Wyoming Regional Airport (RKS) and Springfield Abraham Lincoln Capital Airport (SPI).

## How far is Springfield from Rock Springs?

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

Vincenty's formula (applied above)
• 1022.779 miles
• 1646.003 kilometers
• 888.771 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
• 1020.235 miles
• 1641.909 kilometers
• 886.560 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 Springfield Abraham Lincoln Capital Airport
City: Springfield, IL
Country: United States
IATA Code: SPI
ICAO Code: KSPI
Coordinates: 39°50′38″N, 89°40′40″W

## Time difference and current local times

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

MDT

CDT

## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 152 kg (336 pounds).

## Frequent Flyer Miles Calculator

Rock Springs (RKS) → Springfield (SPI).

Distance:
1023
Elite level bonus:
0
Booking class bonus:
0

### In total

Total frequent flyer miles:
1023

Round trip?