Distance between O'Fallon and Decatur
Distance from O'Fallon, MO to Decatur, IL is 117 miles / 189 kilometers.
Map showing the distance from O'Fallon to Decatur
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Air distance: | miles km |
O'Fallon, MO
| City: | O'Fallon, MO |
| Country: | United States |
Decatur, IL
| City: | Decatur, IL |
| Country: | United States |
Time difference between O'Fallon and Decatur
There is no time difference between O'Fallon and Decatur. Current local time in O'Fallon and Decatur is 17:21 CST (2025-01-21)