Air Miles Calculator

Distance between Memphis, TN (MEM) and Decatur, IL (DEC)

Flight distance from Memphis to Decatur (Memphis International Airport – Decatur Airport) is 336 miles / 541 kilometers / 292 nautical miles. Estimated flight time is 1 hour 8 minutes.

Driving distance from Memphis (MEM) to Decatur (DEC) is 403 miles / 648 kilometers and travel time by car is about 7 hours 14 minutes.

Map of flight path and driving directions from Memphis to Decatur.

Shortest flight path between Memphis International Airport (MEM) and Decatur Airport (DEC).

How far is Decatur from Memphis?

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

Vincenty's formula (applied above)
  • 336.077 miles
  • 540.864 kilometers
  • 292.043 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
  • 336.663 miles
  • 541.807 kilometers
  • 292.553 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 Memphis International Airport
City: Memphis, TN
Country: United States Flag of United States
IATA Code: MEM
ICAO Code: KMEM
Coordinates: 35°2′32″N, 89°58′36″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 Memphis and Decatur.

Time Difference

Memphis, TN

 CST

Decatur, IL

 CST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 74 kg (164 pounds).

Frequent Flyer Miles Calculator

Memphis (MEM) → Decatur (DEC).

Distance:
336
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
336

Round trip?