Calculate route from Williamson County Regional (airport) (Illinois, United States) to O'Fallon (Missouri, United States).
The flight distance (as the crow flies) between Williamson County Regional (airport) and O'Fallon is 188.5 km.
Roadmap (route) to go from Williamson County Regional Airport to O'Fallon detailed above, you can also see the course layout on the map.
While doing trip Williamson County Regional (airport) - O'Fallon by car, the calculated route ends at a distance , or more straight.
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 |