Air Miles Calculator

Distance between New Orleans, LA (MSY) and Decatur, IL (DEC)

Flight distance from New Orleans to Decatur (Louis Armstrong New Orleans International Airport – Decatur Airport) is 683 miles / 1099 kilometers / 593 nautical miles. Estimated flight time is 1 hour 47 minutes.

Driving distance from New Orleans (MSY) to Decatur (DEC) is 777 miles / 1251 kilometers and travel time by car is about 13 hours 39 minutes.

Map of flight path and driving directions from New Orleans to Decatur.

Shortest flight path between Louis Armstrong New Orleans International Airport (MSY) and Decatur Airport (DEC).

How far is Decatur from New Orleans?

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

Vincenty's formula (applied above)
  • 682.965 miles
  • 1099.126 kilometers
  • 593.481 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
  • 684.495 miles
  • 1101.588 kilometers
  • 594.810 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 Louis Armstrong New Orleans International Airport
City: New Orleans, LA
Country: United States Flag of United States
IATA Code: MSY
ICAO Code: KMSY
Coordinates: 29°59′36″N, 90°15′28″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 New Orleans and Decatur.

Time Difference

New Orleans, LA

 CST

Decatur, IL

 CST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 123 kg (270 pounds).

Frequent Flyer Miles Calculator

New Orleans (MSY) → Decatur (DEC).

Distance:
683
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
683

Round trip?