Distance between cities › USA › Indiana › Bourbon, IN › Distance from Bourbon to O Fallon Book Hotels

Distance from Bourbon, IN to O Fallon, MO

Distance

384 mi

Time

7 hours 39 mins

Gas Cost

$36 - $70

There are 296.98 miles from Bourbon to O Fallon in southwest direction and 384 miles (617.99 kilometers) by car, following the I-70 route.

Bourbon and O Fallon are 7 hours 39 mins far apart, if you drive non-stop .

This is the fastest route from Bourbon, IN to O Fallon, MO. The halfway point is Marshall, IL.

Please note the time difference between Bourbon, IN and O Fallon, MO is 1 hour. The current time in Bourbon is 2:25 pm and the current time in O Fallon is 1:25 pm.

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Lowest Price Rental Cars in Bourbon, IN

Planning on renting a car to go from Bourbon, IN to O Fallon, MO? Here there are some offers to rent a car in Bourbon, IN

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Bourbon »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 15.43 gallons of gas to cover the route between Bourbon, IN and O Fallon, MO.

The estimated cost of gas to go from Bourbon to O Fallon is $50.35.

During the route, an average car will release 302.38 pounds of CO₂ to the atmosphere. The carbon footprint would be 0.79 pounds of CO₂ per mile.

Average USA gas price used for calculation is $3.26 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Bourbon, IN and O Fallon, MO

If you want to meet halfway between Bourbon, IN and O Fallon, MO or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 39.422241 and -87.650520, or 39º 25' 20.0676" N, 87º 39' 1.872" W. This location is 192.15 miles away from Bourbon, IN and O Fallon, MO and it would take approximately 3 hours 49 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Marshall, IL, situated 203 miles from Bourbon, IN and 180 miles from O Fallon, MO. It would take 3 hours 48 mins to go from Bourbon to Marshall and 2 hours 55 mins to go from O Fallon to Marshall.