Air Miles Calculator

Distance between Baltimore, MD (BWI) and Decatur, IL (DEC)

Flight distance from Baltimore to Decatur (Baltimore–Washington International Airport – Decatur Airport) is 653 miles / 1051 kilometers / 567 nautical miles. Estimated flight time is 1 hour 44 minutes.

Driving distance from Baltimore (BWI) to Decatur (DEC) is 742 miles / 1194 kilometers and travel time by car is about 13 hours 15 minutes.

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

Shortest flight path between Baltimore–Washington International Airport (BWI) and Decatur Airport (DEC).

How far is Decatur from Baltimore?

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

Vincenty's formula (applied above)
  • 652.934 miles
  • 1050.796 kilometers
  • 567.384 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
  • 651.333 miles
  • 1048.219 kilometers
  • 565.993 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 Baltimore–Washington International Airport
City: Baltimore, MD
Country: United States Flag of United States
IATA Code: BWI
ICAO Code: KBWI
Coordinates: 39°10′31″N, 76°40′5″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 Baltimore and Decatur is 1 hour. Decatur is 1 hour behind Baltimore.

Time Difference

Baltimore, MD

 EDT

Decatur, IL

 CDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 119 kg (263 pounds).

Frequent Flyer Miles Calculator

Baltimore (BWI) → Decatur (DEC).

Distance:
653
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
653

Round trip?