Michigan → Kentucky · Interstate 75 / Interstate 94
What does it actually cost to drive from Detroit, Michigan, to Louisville, Kentucky? The hard numbers: 600 km (373 miles) of pavement primarily along Interstate 75 / Interstate 94, 5h 43m behind the wheel, and roughly $50.14 in fuel alone — that is 54.5 liters (14.4 gallons) of regular unleaded at a 0.92 USD/liter benchmark. Anyone leaving Detroit, the Motor City and historic capital of the American auto industry, typically carries samples, signed proposals, or service equipment to deliver in Louisville, the largest city in Kentucky and home of the Kentucky Derby horse race, and aims to be home the same evening. It is worth confirming whether the haul fits inside your daily hours-of-service window or whether an overnight at a midpoint hotel makes more sense. Applying the IRS standard mileage rate (2025) mileage rate of $0.43/km ($0.69/mile), the gross outbound reimbursement settles at $258.00. Attach the visit purpose, client name, and plate number to the Clara receipt so the journal entry lands directly in the business-travel expense account.