Shortest distance between St. Louis and O'Fallon is 29.88 miles (48.08 km).
Flight distance from St. Louis, MO to O'Fallon, MO is 29.88 miles. Estimated flight time is 00 hours 04 minutes.
The driving distance from St. Louis, Missouri to O'Fallon, Missouri is: 34.06 miles (54.81 km) by car.
Driving from St. Louis to O'Fallon will take approximately 00 hours 38 minutes.
The distance between St. Louis and O'Fallon is 55 km if you choose to drive by road. You can go 00 hours 36 minutes if you drive your car at an average speed of 90 kilometers / hour. For different choices, please review the avg. speed travel time table on the below.
There is no time difference between St. Louis and O'Fallon. The current time is 12:56:56.
|Average Speed||Travel Time|
|30 mph (48.3 km/h)||01 hours 08 minutes|
|40 mph (64.37 km/h)||00 hours 51 minutes|
|50 mph (80.47 km/h)||00 hours 40 minutes|
|60 mph (96.56 km/h)||00 hours 34 minutes|
|70 mph (112.65 km/h)||00 hours 29 minutes|
|75 mph (120.7 km/h)||00 hours 27 minutes|
|80 mph (128.75 km/h)||00 hours 25 minutes|
A car with a fuel efficiency of 8.3 l/100 km will need 4.55 liters (1.2 gallon) of gas to cover the route between St. Louis and O'Fallon.
The estimated cost of gas to go from St. Louis to O'Fallon is $3.99 (diesel $4.41).
Take a look at our Gas Cost Calculator feature. It will figure out how much it will cost to drive this particular distance.
The average gas price per gallon of daily gas for calculations is $3.322 (Diesel $3.671) /gallon. Last changed prices on October 24, 2021.
The place names are translated into coordinates to approximate the distance between St. Louis and O'Fallon (latitude and longitude). Cities, states, and countries each have their own regional center. The Haversine formula is used to measure the radius.