How far is O'Fallon, IL from Decatur, IL?
Distance by Flight
Shortest distance between O'Fallon and Decatur is 100.28 miles (161.39 km).
Flight distance from O'Fallon, IL to Decatur, IL is 100.28 miles. Estimated flight time is 00 hours 13 minutes.
It takes 00 hours 12 minutes to travel from O'Fallon to Decatur with an airplane (average speed of 550 miles).
Driving distance
The driving distance from O'Fallon, Illinois to Decatur, Illinois is: 112.43 miles (180.94 km) by car.
Driving from O'Fallon to Decatur will take approximately 02 hours 01 minutes.
#1 O'Fallon
Township in St. Clair County, Illinois
| Population | 29606 |
|---|---|
| GPS Coordinates | 38°35'32"N 89°54'40"W |
| Latitude | 38.5922700 |
| Longitude | -89.9112100 |
| Altitude | 167 |
| Country | United States |
#2 Decatur
The most populous city in Macon County, Illinois. It is located on the Sangamon River in central Illinois. Decatur is known for its many parks and green spaces, its many historical sites, and its many attractions, such as the Decatur Museum of Art and History and the Lincoln Log Cabin State Historic Site.
| Population | 70007 |
|---|---|
| GPS Coordinates | 39°50'25"N 88°57'17"W |
| Latitude | 39.8403100 |
| Longitude | -88.9548000 |
| Altitude | 205 |
| Country | United States |
Ending point in Decatur: East Wood Street (-88.954801,39.840341)
Estimated Travel Time Between O'Fallon and Decatur
The distance between O'Fallon and Decatur is 181 km if you choose to drive by road. You can go 02 hours 00 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 O'Fallon and Decatur. The current time is 01:48:11.
| Average Speed | Travel Time |
|---|---|
| 30 mph (48.3 km/h) | 03 hours 44 minutes |
| 40 mph (64.37 km/h) | 02 hours 48 minutes |
| 50 mph (80.47 km/h) | 02 hours 14 minutes |
| 60 mph (96.56 km/h) | 01 hours 52 minutes |
| 70 mph (112.65 km/h) | 01 hours 36 minutes |
| 75 mph (120.7 km/h) | 01 hours 29 minutes |
| 80 mph (128.75 km/h) | 01 hours 24 minutes |
Gas Consumption
A car with a fuel efficiency of 8.3 l/100 km will need 15.02 liters (3.97 gallon) of gas to cover the route between O'Fallon and Decatur.
The estimated cost of gas to go from O'Fallon to Decatur is $14.31 (diesel $17.06).
Illinois gas prices.
| Gasoline | Mid Grade | Premium | Diesel | |
|---|---|---|---|---|
| Gallon | $3.61 | $4.11 | $4.55 | $4.3 |
| Total | $14.31 | $16.31 | $18.06 | $17.06 |
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 (in Illinois ) per gallon of daily gas for calculations is $3.607 (Diesel $4.300) /gallon. Last changed prices on December 22, 2024.
How did we calculate the distance?
The place names are translated into coordinates to approximate the distance between O'Fallon and Decatur (latitude and longitude). Cities, states, and countries each have their own regional center. The Haversine formula is used to measure the radius.
