Air Miles Calculator

Distance between South Bend, IN (SBN) and Decatur, IL (DEC)

Flight distance from South Bend to Decatur (South Bend International Airport – Decatur Airport) is 186 miles / 299 kilometers / 162 nautical miles. Estimated flight time is 51 minutes.

Driving distance from South Bend (SBN) to Decatur (DEC) is 235 miles / 379 kilometers and travel time by car is about 4 hours 18 minutes.

Map of flight path and driving directions from South Bend to Decatur.

Shortest flight path between South Bend International Airport (SBN) and Decatur Airport (DEC).

How far is Decatur from South Bend?

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

Vincenty's formula (applied above)
  • 185.981 miles
  • 299.308 kilometers
  • 161.613 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
  • 185.855 miles
  • 299.105 kilometers
  • 161.504 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 South Bend International Airport
City: South Bend, IN
Country: United States Flag of United States
IATA Code: SBN
ICAO Code: KSBN
Coordinates: 41°42′31″N, 86°19′2″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

The time difference between South Bend and Decatur is 1 hour. Decatur is 1 hour behind South Bend.

Time Difference

South Bend, IN

 EDT

Decatur, IL

 CDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 52 kg (115 pounds).

Frequent Flyer Miles Calculator

South Bend (SBN) → Decatur (DEC).

Distance:
186
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
186

Round trip?