Distance from Saint Louis, MO to O Fallon, IL is 18Miles or 29 Km. You can get this distance about 25 mins. If you want to planning travel with plane, you can get this distance about 32 mins .
A car with an average MPG will needs 0.83 gallons of gas to get the route between these points.
The estimated cost of gas to get between Saint Louis, MO and O Fallon, IL is $1.88.
During the route, an average car will release 16.26 pounds of CO2 to the atmosphere. Your carbon footprint is 0.9 pounds of CO2 per mile.
* Average US MPG used for calculations is 21.6 MPG.
* Average US gas price used for calculation is 2.27 per gallon.
* Coordinates of Saint Louis, MO is 38.6276455, -90.19916610000001 and coordinates of O Fallon, IL is 38.5923117, -89.91099350000002