Air Miles Calculator

Distance between Des Moines, IA (DSM) and Decatur, IL (DEC)

Flight distance from Des Moines to Decatur (Des Moines International Airport – Decatur Airport) is 278 miles / 447 kilometers / 241 nautical miles. Estimated flight time is 1 hour 1 minutes.

Driving distance from Des Moines (DSM) to Decatur (DEC) is 359 miles / 577 kilometers and travel time by car is about 6 hours 24 minutes.

Map of flight path and driving directions from Des Moines to Decatur.

Shortest flight path between Des Moines International Airport (DSM) and Decatur Airport (DEC).

How far is Decatur from Des Moines?

There are several ways to calculate distances between Des Moines and Decatur. Here are two common methods:

Vincenty's formula (applied above)
  • 277.889 miles
  • 447.219 kilometers
  • 241.479 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
  • 277.375 miles
  • 446.391 kilometers
  • 241.032 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 Des Moines International Airport
City: Des Moines, IA
Country: United States Flag of United States
IATA Code: DSM
ICAO Code: KDSM
Coordinates: 41°32′2″N, 93°39′47″W

B Decatur Airport
City: Decatur, IL
Country: United States Flag of United States
IATA Code: DEC
ICAO Code: KDEC
Coordinates: 39°50′4″N, 88°51′56″W

Time difference and current local times

There is no time difference between Des Moines and Decatur.

Time Difference

Des Moines, IA

 CST

Decatur, IL

 CST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 66 kg (145 pounds).

Frequent Flyer Miles Calculator

Des Moines (DSM) → Decatur (DEC).

Distance:
278
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
278

Round trip?