Calculate route from Decatur (Illinois, United States) to O'Fallon (Missouri, United States).
The flight distance (as the crow flies) between Decatur and O'Fallon is 188.7 km.
Roadmap (route) to go from Decatur to O'Fallon detailed above, you can also see the course layout on the map.
While doing trip Decatur - O'Fallon by car, the calculated route ends at a distance , or more straight.
Country flag | ![]() |
Location | Decatur |
State | Illinois |
County | Macon County |
Country | United States |
Country code / ISO 2 | US |
Latitude | 39.8403100 |
Longitude | -88.9548000 |
Altitude | 205 meters |
Time zone | America/Chicago |
Country flag | ![]() |
Location | O'Fallon |
State | Missouri |
County | Saint Charles County |
Country | United States |
Country code / ISO 2 | US |
Latitude | 38.8106100 |
Longitude | -90.6998500 |
Altitude | 165 meters |
Time zone | America/Chicago |