Distance between Rapid City and O'Fallon
Distance from Rapid City, SD to O'Fallon, IL is 787 miles / 1266 kilometers.
Map showing the distance from Rapid City to O'Fallon
![]() |
Air distance: | miles km |
Rapid City, SD
City: | Rapid City, SD |
Country: | United States |
O'Fallon, IL
City: | O'Fallon, IL |
Country: | United States |
Time difference between Rapid City and O'Fallon
The time difference between Rapid City and O'Fallon is 1 hour. O'Fallon is 1 hour ahead of Rapid City. Current local time in Rapid City is 14:53 MST (2025-02-27) and time in O'Fallon is 15:53 CST (2025-02-27).